文章转自：http://www.cnblogs.com/sufei/archive/2009/05/23/1487540.html
在asp.net中导出Excel有两种方法，一种是将导出的文件存放在服务器某个文件夹下面，然后将文件地址输出在浏览器上；一种是将文件直接将文件输出流写给浏览器。在Response输出时，t分隔的数据，导出Excel时，等价于分列，n等价于换行。
1、将整个html全部输出Excel
此法将html中所有的内容，如按钮，表格，图片等全部输出到Excel中。
代码
1 Response.Clear();
2 Response.Buffer= true;
3 Response.AppendHeader("Content-Disposition","attachment;filename="+DateTime.Now.ToString("yyyyMMdd")+".xls");
4 Response.ContentEncoding=System.Text.Encoding.UTF8;
5 Response.ContentType = "application/vnd.ms-excel";
6 this.EnableViewState = false;
7
8
2 Response.Buffer= true;
3 Response.AppendHeader("Content-Disposition","attachment;filename="+DateTime.Now.ToString("yyyyMMdd")+".xls");
4 Response.ContentEncoding=System.Text.Encoding.UTF8;
5 Response.ContentType = "application/vnd.ms-excel";
6 this.EnableViewState = false;
7
8
这里我们利用了ContentType属性，它默认的属性为text/html，这时将输出为超文本，即我们常见的网页格式到客户端，如果改为ms-excel将将输出excel格式，也就是说以电子表格的格式输出到客户端，这时浏览器将提示你下载保存。ContentType的属性还包括：image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword 。同理，我们也可以输出(导出)图片、word文档等。下面的方法，也均用了这个属性。
2、将DataGrid控件中的数据导出Excel
上述方法虽然实现了导出的功能，但同时把按钮、分页框等html中的所有输出信息导了进去。而我们一般要导出的是数据，DataGrid控件上的数据。
代码
1 System.Web.UI.Control ctl=this.DataGrid1;
2 //DataGrid1是你在窗体中拖放的控件
3 HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
4 HttpContext.Current.Response.Charset ="UTF-8";
5 HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
6 HttpContext.Current.Response.ContentType ="application/ms-excel";
7 ctl.Page.EnableViewState =false;
8 System.IO.StringWriter tw = new System.IO.StringWriter() ;
9 System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
10 ctl.RenderControl(hw);
11 HttpContext.Current.Response.Write(tw.ToString());
12 HttpContext.Current.Response.End();
13
14
2 //DataGrid1是你在窗体中拖放的控件
3 HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
4 HttpContext.Current.Response.Charset ="UTF-8";
5 HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
6 HttpContext.Current.Response.ContentType ="application/ms-excel";
7 ctl.Page.EnableViewState =false;
8 System.IO.StringWriter tw = new System.IO.StringWriter() ;
9 System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
10 ctl.RenderControl(hw);
11 HttpContext.Current.Response.Write(tw.ToString());
12 HttpContext.Current.Response.End();
13
14
如果你的DataGrid用了分页，它导出的是当前页的信息，也就是它导出的是DataGrid中显示的信息。而不是你select语句的全部信息。
为方便使用,写成方法如下：
代码
1 public void DGToExcel(System.Web.UI.Control ctl)
2 {
3 HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
4 HttpContext.Current.Response.Charset ="UTF-8";
5 HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
6 HttpContext.Current.Response.ContentType ="application/ms-excel";
7 ctl.Page.EnableViewState =false;
8 System.IO.StringWriter tw = new System.IO.StringWriter() ;
9 System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
10 ctl.RenderControl(hw);
11 HttpContext.Current.Response.Write(tw.ToString());
12 HttpContext.Current.Response.End();
13 }
14
15
2 {
3 HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
4 HttpContext.Current.Response.Charset ="UTF-8";
5 HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
6 HttpContext.Current.Response.ContentType ="application/ms-excel";
7 ctl.Page.EnableViewState =false;
8 System.IO.StringWriter tw = new System.IO.StringWriter() ;
9 System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
10 ctl.RenderControl(hw);
11 HttpContext.Current.Response.Write(tw.ToString());
12 HttpContext.Current.Response.End();
13 }
14
15
3、将DataSet中的数据导出Excel
有了上边的思路，就是将在导出的信息，输出（Response）客户端，这样就可以导出了。那么把DataSet中的数据导出，也就是把DataSet中的表中的各行信息，以ms-excel的格式Response到http流，这样就OK了。说明：参数ds应为填充有数据表的DataSet，文件名是全名，包括后缀名，如Excel2006.xls
代码
1 public void CreateExcel(DataSet ds,string FileName)
2 {
3 HttpResponse resp;
4 resp = Page.Response;
5 resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
6 resp.AppendHeader("Content-Disposition", "attachment;filename="+FileName);
7 string colHeaders= "", ls_item="";
8
9 //定义表对象与行对象，同时用DataSet对其值进行初始化
10 DataTable dt=ds.Tables[0];
11 DataRow[] myRow=dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
12 int i=0;
13 int cl=dt.Columns.Count;
14
15 //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符
16 for(i=0;i<cl;i++)
17 {
18 if(i==(cl-1))//最后一列，加n
19 {
20 colHeaders +=dt.Columns[i].Caption.ToString() +"n";
21 }
22 else
23 {
24 colHeaders+=dt.Columns[i].Caption.ToString()+"t";
25 }
26
27 }
28 resp.Write(colHeaders);
29 //向HTTP输出流中写入取得的数据信息
30
31 //逐行处理数据
32 foreach(DataRow row in myRow)
33 {
34 //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
35 for(i=0;i<cl;i++)
36 {
37 if(i==(cl-1))//最后一列，加n
38 {
39 ls_item +=row[i].ToString()+"n";
40 }
41 else
42 {
43 ls_item+=row[i].ToString()+"t";
44 }
45
46 }
47 resp.Write(ls_item);
48 ls_item="";
49
50 }
51 resp.End();
52 }
53
54
2 {
3 HttpResponse resp;
4 resp = Page.Response;
5 resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
6 resp.AppendHeader("Content-Disposition", "attachment;filename="+FileName);
7 string colHeaders= "", ls_item="";
8
9 //定义表对象与行对象，同时用DataSet对其值进行初始化
10 DataTable dt=ds.Tables[0];
11 DataRow[] myRow=dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
12 int i=0;
13 int cl=dt.Columns.Count;
14
15 //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符
16 for(i=0;i<cl;i++)
17 {
18 if(i==(cl-1))//最后一列，加n
19 {
20 colHeaders +=dt.Columns[i].Caption.ToString() +"n";
21 }
22 else
23 {
24 colHeaders+=dt.Columns[i].Caption.ToString()+"t";
25 }
26
27 }
28 resp.Write(colHeaders);
29 //向HTTP输出流中写入取得的数据信息
30
31 //逐行处理数据
32 foreach(DataRow row in myRow)
33 {
34 //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
35 for(i=0;i<cl;i++)
36 {
37 if(i==(cl-1))//最后一列，加n
38 {
39 ls_item +=row[i].ToString()+"n";
40 }
41 else
42 {
43 ls_item+=row[i].ToString()+"t";
44 }
45
46 }
47 resp.Write(ls_item);
48 ls_item="";
49
50 }
51 resp.End();
52 }
53
54
4、将dataview导出excel
若想实现更加富于变化或者行列不规则的excel导出时，可用本法。
若想实现更加富于变化或者行列不规则的excel导出时，可用本法。
代码
1 public void OutputExcel(DataView dv,string str)
2 {
3 //dv为要输出到Excel的数据，str为标题名称
4 GC.Collect();
5 Application excel;// = new Application();
6 int rowIndex=4;
7 int colIndex=1;
8
9 _Workbook xBk;
10 _Worksheet xSt;
11
12 excel= new ApplicationClass();
13
14 xBk = excel.Workbooks.Add(true);
15
16 xSt = (_Worksheet)xBk.ActiveSheet;
17
18 //
19 //取得标题
20 //
21 foreach(DataColumn col in dv.Table.Columns)
22 {
23 colIndex++;
24 excel.Cells[4,colIndex] = col.ColumnName;
25 xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[4,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐
26 }
27
28 //
29 //取得表格中的数据
30 //
31 foreach(DataRowView row in dv)
32 {
33 rowIndex ++;
34 colIndex = 1;
35 foreach(DataColumn col in dv.Table.Columns)
36 {
37 colIndex ++;
38 if(col.DataType == System.Type.GetType("System.DateTime"))
39 {
40 excel.Cells[rowIndex,colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
41 xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
42 }
43 else
44 if(col.DataType == System.Type.GetType("System.String"))
45 {
46 excel.Cells[rowIndex,colIndex] = "'"+row[col.ColumnName].ToString();
47 xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
48 }
49 else
50 {
51 excel.Cells[rowIndex,colIndex] = row[col.ColumnName].ToString();
52 }
53 }
54 }
55 //
56 //加载一个合计行
57 //
58 int rowSum = rowIndex + 1;
59 int colSum = 2;
60 excel.Cells[rowSum,2] = "合计";
61 xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,2]).HorizontalAlignment = XlHAlign.xlHAlignCenter;
62 //
63 //设置选中的部分的颜色
64 //
65 xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Select();
66 xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex = 19;//设置为浅黄色，共计有56种
67 //
68 //取得整个报表的标题
69 //
70 excel.Cells[2,2] = str;
71 //
72 //设置整个报表的标题格式
73 //
74 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Bold = true;
75 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Size = 22;
76 //
77 //设置报表表格为最适应宽度
78 //
79 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Select();
80 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Columns.AutoFit();
81 //
82 //设置整个报表的标题为跨列居中
83 //
84 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).Select();
85 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection;
86 //
87 //绘制边框
88 //
89 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Borders.LineStyle = 1;
90 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,2]).Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//设置左边线加粗
91 xSt.get_Range(excel.Cells[4,2],excel.Cells[4,colIndex]).Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//设置上边线加粗
92 xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//设置右边线加粗
93 xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;//设置下边线加粗
94 //
95 //显示效果
96 //
97 excel.Visible=true;
98
99 //xSt.Export(Server.MapPath(".")+""+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportFormat.ssExportHTML);
100 xBk.SaveCopyAs(Server.MapPath(".")+""+this.xlfile.Text+".xls");
101
102 ds = null;
103 xBk.Close(false, null,null);
104
105 excel.Quit();
106 System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
107 System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
108 System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
109 xBk = null;
110 excel = null;
111 xSt = null;
112 GC.Collect();
113 string path = Server.MapPath(this.xlfile.Text+".xls");
114
115 System.IO.FileInfo file = new System.IO.FileInfo(path);
116 Response.Clear();
117 Response.Charset="GB2312";
118 Response.ContentEncoding=System.Text.Encoding.UTF8;
119 // 添加头信息，为"文件下载/另存为"对话框指定默认文件名
120 Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
121 // 添加头信息，指定文件大小，让浏览器能够显示下载进度
122 Response.AddHeader("Content-Length", file.Length.ToString());
123
124 // 指定返回的是一个不能被客户端读取的流，必须被下载
125 Response.ContentType = "application/ms-excel";
126
127 // 把文件流发送到客户端
128 Response.WriteFile(file.FullName);
129 // 停止页面的执行
130
131 Response.End();
132 }
133
134
2 {
3 //dv为要输出到Excel的数据，str为标题名称
4 GC.Collect();
5 Application excel;// = new Application();
6 int rowIndex=4;
7 int colIndex=1;
8
9 _Workbook xBk;
10 _Worksheet xSt;
11
12 excel= new ApplicationClass();
13
14 xBk = excel.Workbooks.Add(true);
15
16 xSt = (_Worksheet)xBk.ActiveSheet;
17
18 //
19 //取得标题
20 //
21 foreach(DataColumn col in dv.Table.Columns)
22 {
23 colIndex++;
24 excel.Cells[4,colIndex] = col.ColumnName;
25 xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[4,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐
26 }
27
28 //
29 //取得表格中的数据
30 //
31 foreach(DataRowView row in dv)
32 {
33 rowIndex ++;
34 colIndex = 1;
35 foreach(DataColumn col in dv.Table.Columns)
36 {
37 colIndex ++;
38 if(col.DataType == System.Type.GetType("System.DateTime"))
39 {
40 excel.Cells[rowIndex,colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
41 xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
42 }
43 else
44 if(col.DataType == System.Type.GetType("System.String"))
45 {
46 excel.Cells[rowIndex,colIndex] = "'"+row[col.ColumnName].ToString();
47 xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
48 }
49 else
50 {
51 excel.Cells[rowIndex,colIndex] = row[col.ColumnName].ToString();
52 }
53 }
54 }
55 //
56 //加载一个合计行
57 //
58 int rowSum = rowIndex + 1;
59 int colSum = 2;
60 excel.Cells[rowSum,2] = "合计";
61 xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,2]).HorizontalAlignment = XlHAlign.xlHAlignCenter;
62 //
63 //设置选中的部分的颜色
64 //
65 xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Select();
66 xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex = 19;//设置为浅黄色，共计有56种
67 //
68 //取得整个报表的标题
69 //
70 excel.Cells[2,2] = str;
71 //
72 //设置整个报表的标题格式
73 //
74 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Bold = true;
75 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Size = 22;
76 //
77 //设置报表表格为最适应宽度
78 //
79 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Select();
80 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Columns.AutoFit();
81 //
82 //设置整个报表的标题为跨列居中
83 //
84 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).Select();
85 xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection;
86 //
87 //绘制边框
88 //
89 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Borders.LineStyle = 1;
90 xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,2]).Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//设置左边线加粗
91 xSt.get_Range(excel.Cells[4,2],excel.Cells[4,colIndex]).Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//设置上边线加粗
92 xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//设置右边线加粗
93 xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;//设置下边线加粗
94 //
95 //显示效果
96 //
97 excel.Visible=true;
98
99 //xSt.Export(Server.MapPath(".")+""+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportFormat.ssExportHTML);
100 xBk.SaveCopyAs(Server.MapPath(".")+""+this.xlfile.Text+".xls");
101
102 ds = null;
103 xBk.Close(false, null,null);
104
105 excel.Quit();
106 System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
107 System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
108 System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
109 xBk = null;
110 excel = null;
111 xSt = null;
112 GC.Collect();
113 string path = Server.MapPath(this.xlfile.Text+".xls");
114
115 System.IO.FileInfo file = new System.IO.FileInfo(path);
116 Response.Clear();
117 Response.Charset="GB2312";
118 Response.ContentEncoding=System.Text.Encoding.UTF8;
119 // 添加头信息，为"文件下载/另存为"对话框指定默认文件名
120 Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
121 // 添加头信息，指定文件大小，让浏览器能够显示下载进度
122 Response.AddHeader("Content-Length", file.Length.ToString());
123
124 // 指定返回的是一个不能被客户端读取的流，必须被下载
125 Response.ContentType = "application/ms-excel";
126
127 // 把文件流发送到客户端
128 Response.WriteFile(file.FullName);
129 // 停止页面的执行
130
131 Response.End();
132 }
133
134
二、winForm中导出Excel的方法：
1、方法1：
1、方法1：
代码
1 SqlConnection conn=new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["conn"]);
2 SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);
3 DataSet ds=new DataSet();
4 da.Fill(ds,"table1");
5 DataTable dt=ds.Tables["table1"];
6 string name=System.Configuration.ConfigurationSettings.AppSettings["downloadurl"].ToString()+DateTime.Today.ToString("yyyyMMdd")+new Random(DateTime.Now.Millisecond).Next(10000).ToString()+".csv";//存放到web.config中downloadurl指定的路径，文件格式为当前日期+4位随机数
7 FileStream fs=new FileStream(name,FileMode.Create,FileAccess.Write);
8 StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("gb2312"));
9 sw.WriteLine("自动编号,姓名,年龄");
10 foreach(DataRow dr in dt.Rows)
11 {
12 sw.WriteLine(dr["ID"]+","+dr["vName"]+","+dr["iAge"]);
13 }
14 sw.Close();
15 Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(name));
16 Response.ContentType = "application/ms-excel";// 指定返回的是一个不能被客户端读取的流，必须被下载
17 Response.WriteFile(name); // 把文件流发送到客户端
18 Response.End();
19
20
21 public void Out2Excel(string sTableName,string url)
22 {
23 Excel.Application oExcel=new Excel.Application();
24 Workbooks oBooks;
25 Workbook oBook;
26 Sheets oSheets;
27 Worksheet oSheet;
28 Range oCells;
29 string sFile="",sTemplate="";
30 //
31 System.Data.DataTable dt=TableOut(sTableName).Tables[0];
32
33 sFile=url+"myExcel.xls";
34 sTemplate=url+"MyTemplate.xls";
35 //
36 oExcel.Visible=false;
37 oExcel.DisplayAlerts=false;
38 //定义一个新的工作簿
39 oBooks=oExcel.Workbooks;
40 oBooks.Open(sTemplate,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing, Type.Missing, Type.Missing);
41 oBook=oBooks.get_Item(1);
42 oSheets=oBook.Worksheets;
43 oSheet=(Worksheet)oSheets.get_Item(1);
44 //命名该sheet
45 oSheet.Name="Sheet1";
46
47 oCells=oSheet.Cells;
48 //调用dumpdata过程，将数据导入到Excel中去
49 DumpData(dt,oCells);
50 //保存
51 oSheet.SaveAs(sFile,Excel.XlFileFormat.xlTemplate,Type.Missing,Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);
52 oBook.Close(false, Type.Missing,Type.Missing);
53 //退出Excel，并且释放调用的COM资源
54 oExcel.Quit();
55
56 GC.Collect();
57 KillProcess("Excel");
58 }
59
60 private void KillProcess(string processName)
61 {
62 System.Diagnostics.Process myproc= new System.Diagnostics.Process();
63 //得到所有打开的进程
64 try
65 {
66 foreach (Process thisproc in Process.GetProcessesByName(processName))
67 {
68 if(!thisproc.CloseMainWindow())
69 {
70 thisproc.Kill();
71 }
72 }
73 }
74 catch(Exception Exc)
75 {
76 throw new Exception("",Exc);
77 }
78 }
79
80
2 SqlDataAdapter da=new SqlDataAdapter("select * from tb1",conn);
3 DataSet ds=new DataSet();
4 da.Fill(ds,"table1");
5 DataTable dt=ds.Tables["table1"];
6 string name=System.Configuration.ConfigurationSettings.AppSettings["downloadurl"].ToString()+DateTime.Today.ToString("yyyyMMdd")+new Random(DateTime.Now.Millisecond).Next(10000).ToString()+".csv";//存放到web.config中downloadurl指定的路径，文件格式为当前日期+4位随机数
7 FileStream fs=new FileStream(name,FileMode.Create,FileAccess.Write);
8 StreamWriter sw=new StreamWriter(fs,System.Text.Encoding.GetEncoding("gb2312"));
9 sw.WriteLine("自动编号,姓名,年龄");
10 foreach(DataRow dr in dt.Rows)
11 {
12 sw.WriteLine(dr["ID"]+","+dr["vName"]+","+dr["iAge"]);
13 }
14 sw.Close();
15 Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(name));
16 Response.ContentType = "application/ms-excel";// 指定返回的是一个不能被客户端读取的流，必须被下载
17 Response.WriteFile(name); // 把文件流发送到客户端
18 Response.End();
19
20
21 public void Out2Excel(string sTableName,string url)
22 {
23 Excel.Application oExcel=new Excel.Application();
24 Workbooks oBooks;
25 Workbook oBook;
26 Sheets oSheets;
27 Worksheet oSheet;
28 Range oCells;
29 string sFile="",sTemplate="";
30 //
31 System.Data.DataTable dt=TableOut(sTableName).Tables[0];
32
33 sFile=url+"myExcel.xls";
34 sTemplate=url+"MyTemplate.xls";
35 //
36 oExcel.Visible=false;
37 oExcel.DisplayAlerts=false;
38 //定义一个新的工作簿
39 oBooks=oExcel.Workbooks;
40 oBooks.Open(sTemplate,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing,Type.Missing, Type.Missing, Type.Missing);
41 oBook=oBooks.get_Item(1);
42 oSheets=oBook.Worksheets;
43 oSheet=(Worksheet)oSheets.get_Item(1);
44 //命名该sheet
45 oSheet.Name="Sheet1";
46
47 oCells=oSheet.Cells;
48 //调用dumpdata过程，将数据导入到Excel中去
49 DumpData(dt,oCells);
50 //保存
51 oSheet.SaveAs(sFile,Excel.XlFileFormat.xlTemplate,Type.Missing,Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);
52 oBook.Close(false, Type.Missing,Type.Missing);
53 //退出Excel，并且释放调用的COM资源
54 oExcel.Quit();
55
56 GC.Collect();
57 KillProcess("Excel");
58 }
59
60 private void KillProcess(string processName)
61 {
62 System.Diagnostics.Process myproc= new System.Diagnostics.Process();
63 //得到所有打开的进程
64 try
65 {
66 foreach (Process thisproc in Process.GetProcessesByName(processName))
67 {
68 if(!thisproc.CloseMainWindow())
69 {
70 thisproc.Kill();
71 }
72 }
73 }
74 catch(Exception Exc)
75 {
76 throw new Exception("",Exc);
77 }
78 }
79
80
2、方法2：
代码
1 protected void ExportExcel()
2 {
3 gridbind();
4 if(ds1==null) return;
5
6 string saveFileName="";
7 // bool fileSaved=false;
8 SaveFileDialog saveDialog=new SaveFileDialog();
9 saveDialog.DefaultExt ="xls";
10 saveDialog.Filter="Excel文件|*.xls";
11 saveDialog.FileName ="Sheet1";
12 saveDialog.ShowDialog();
13 saveFileName=saveDialog.FileName;
14 if(saveFileName.IndexOf(":")<0) return; //被点了取消
15 // excelapp.Workbooks.Open (App.path & 工程进度表.xls)
16
17 Excel.Application xlApp=new Excel.Application();
18 object missing=System.Reflection.Missing.Value;
19
20
21 if(xlApp==null)
22 {
23 MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
24 return;
25 }
26 Excel.Workbooks workbooks=xlApp.Workbooks;
27 Excel.Workbook workbook=workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
28 Excel.Worksheet worksheet=(Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
29 Excel.Range range;
30
31
32 string oldCaption=Title_label .Text.Trim ();
33 long totalCount=ds1.Tables[0].Rows.Count;
34 long rowRead=0;
35 float percent=0;
36
37 worksheet.Cells[1,1]=Title_label .Text.Trim ();
38 //写入字段
39 for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
40 {
41 worksheet.Cells[2,i+1]=ds1.Tables[0].Columns.ColumnName;
42 range=(Excel.Range)worksheet.Cells[2,i+1];
43 range.Interior.ColorIndex = 15;
44 range.Font.Bold = true;
45
46 }
47 //写入数值
48 Caption .Visible = true;
49 for(int r=0;r<ds1.Tables[0].Rows.Count;r++)
50 {
51 for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
52 {
53 worksheet.Cells[r+3,i+1]=ds1.Tables[0].Rows[r];
54 }
55 rowRead++;
56 percent=((float)(100*rowRead))/totalCount;
57 this.Caption.Text= "正在导出数据["+ percent.ToString("0.00") +"%]";
58 Application.DoEvents();
59 }
60 worksheet.SaveAs(saveFileName,missing,missing,missing,missing,missing,missing,missing,missing);
61
62 this.Caption.Visible= false;
63 this.Caption.Text= oldCaption;
64
65 range=worksheet.get_Range(worksheet.Cells[2,1],worksheet.Cells[ds1.Tables[0].Rows.Count+2,ds1.Tables[0].Columns.Count]);
66 range.BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin,Excel.XlColorIndex.xlColorIndexAutomatic,null);
67
68 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
69 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle =Excel.XlLineStyle.xlContinuous;
70 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight =Excel.XlBorderWeight.xlThin;
71
72 if(ds1.Tables[0].Columns.Count>1)
73 {
74 range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex=Excel.XlColorIndex.xlColorIndexAutomatic;
75 }
76 workbook.Close(missing,missing,missing);
77 xlApp.Quit();
78 }
79
80
2 {
3 gridbind();
4 if(ds1==null) return;
5
6 string saveFileName="";
7 // bool fileSaved=false;
8 SaveFileDialog saveDialog=new SaveFileDialog();
9 saveDialog.DefaultExt ="xls";
10 saveDialog.Filter="Excel文件|*.xls";
11 saveDialog.FileName ="Sheet1";
12 saveDialog.ShowDialog();
13 saveFileName=saveDialog.FileName;
14 if(saveFileName.IndexOf(":")<0) return; //被点了取消
15 // excelapp.Workbooks.Open (App.path & 工程进度表.xls)
16
17 Excel.Application xlApp=new Excel.Application();
18 object missing=System.Reflection.Missing.Value;
19
20
21 if(xlApp==null)
22 {
23 MessageBox.Show("无法创建Excel对象，可能您的机子未安装Excel");
24 return;
25 }
26 Excel.Workbooks workbooks=xlApp.Workbooks;
27 Excel.Workbook workbook=workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
28 Excel.Worksheet worksheet=(Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
29 Excel.Range range;
30
31
32 string oldCaption=Title_label .Text.Trim ();
33 long totalCount=ds1.Tables[0].Rows.Count;
34 long rowRead=0;
35 float percent=0;
36
37 worksheet.Cells[1,1]=Title_label .Text.Trim ();
38 //写入字段
39 for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
40 {
41 worksheet.Cells[2,i+1]=ds1.Tables[0].Columns.ColumnName;
42 range=(Excel.Range)worksheet.Cells[2,i+1];
43 range.Interior.ColorIndex = 15;
44 range.Font.Bold = true;
45
46 }
47 //写入数值
48 Caption .Visible = true;
49 for(int r=0;r<ds1.Tables[0].Rows.Count;r++)
50 {
51 for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
52 {
53 worksheet.Cells[r+3,i+1]=ds1.Tables[0].Rows[r];
54 }
55 rowRead++;
56 percent=((float)(100*rowRead))/totalCount;
57 this.Caption.Text= "正在导出数据["+ percent.ToString("0.00") +"%]";
58 Application.DoEvents();
59 }
60 worksheet.SaveAs(saveFileName,missing,missing,missing,missing,missing,missing,missing,missing);
61
62 this.Caption.Visible= false;
63 this.Caption.Text= oldCaption;
64
65 range=worksheet.get_Range(worksheet.Cells[2,1],worksheet.Cells[ds1.Tables[0].Rows.Count+2,ds1.Tables[0].Columns.Count]);
66 range.BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin,Excel.XlColorIndex.xlColorIndexAutomatic,null);
67
68 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
69 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle =Excel.XlLineStyle.xlContinuous;
70 range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight =Excel.XlBorderWeight.xlThin;
71
72 if(ds1.Tables[0].Columns.Count>1)
73 {
74 range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex=Excel.XlColorIndex.xlColorIndexAutomatic;
75 }
76 workbook.Close(missing,missing,missing);
77 xlApp.Quit();
78 }
79
80
6.从DataGridView里导出
代码
1 /// <summary>
2 /// 常用方法，列之间加\t开。
3 /// </summary>
4 /// <remarks>
5 /// using System.IO;
6 /// </remarks>
7 /// <param name="dgv"></param>
8 private void DataGridViewToExcel(DataGridView dgv)
9 {
10 SaveFileDialog dlg = new SaveFileDialog();
11 dlg.Filter = "Execl files (*.xls)|*.xls";
12 dlg.CheckFileExists = false;
13 dlg.CheckPathExists = false;
14 dlg.FilterIndex = 0;
15 dlg.RestoreDirectory = true;
16 dlg.CreatePrompt = true;
17 dlg.Title = "保存为Excel文件";
18
19 if (dlg.ShowDialog() == DialogResult.OK)
20 {
21 Stream myStream;
22 myStream = dlg.OpenFile();
23 StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
24 string columnTitle = "";
25 try
26 {
27 //写入列标题
28 for (int i = 0; i < dgv.ColumnCount; i++)
29 {
30 if (i > 0)
31 {
32 columnTitle += "\t";
33 }
34 columnTitle += dgv.Columns[i].HeaderText;
35 }
36 sw.WriteLine(columnTitle);
37
38 //写入列内容
39 for (int j = 0; j < dgv.Rows.Count; j++)
40 {
41 string columnValue = "";
42 for (int k = 0; k < dgv.Columns.Count; k++)
43 {
44 if (k > 0)
45 {
46 columnValue += "\t";
47 }
48 if (dgv.Rows[j].Cells[k].Value == null)
49 columnValue += "";
50 else
51 columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();
52 }
53 sw.WriteLine(columnValue);
54 }
55 sw.Close();
56 myStream.Close();
57 }
58 catch (Exception e)
59 {
60 MessageBox.Show(e.ToString());
61 }
62 finally
63 {
64 sw.Close();
65 myStream.Close();
66 }
67 }
68 }
69
2 /// 常用方法，列之间加\t开。
3 /// </summary>
4 /// <remarks>
5 /// using System.IO;
6 /// </remarks>
7 /// <param name="dgv"></param>
8 private void DataGridViewToExcel(DataGridView dgv)
9 {
10 SaveFileDialog dlg = new SaveFileDialog();
11 dlg.Filter = "Execl files (*.xls)|*.xls";
12 dlg.CheckFileExists = false;
13 dlg.CheckPathExists = false;
14 dlg.FilterIndex = 0;
15 dlg.RestoreDirectory = true;
16 dlg.CreatePrompt = true;
17 dlg.Title = "保存为Excel文件";
18
19 if (dlg.ShowDialog() == DialogResult.OK)
20 {
21 Stream myStream;
22 myStream = dlg.OpenFile();
23 StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
24 string columnTitle = "";
25 try
26 {
27 //写入列标题
28 for (int i = 0; i < dgv.ColumnCount; i++)
29 {
30 if (i > 0)
31 {
32 columnTitle += "\t";
33 }
34 columnTitle += dgv.Columns[i].HeaderText;
35 }
36 sw.WriteLine(columnTitle);
37
38 //写入列内容
39 for (int j = 0; j < dgv.Rows.Count; j++)
40 {
41 string columnValue = "";
42 for (int k = 0; k < dgv.Columns.Count; k++)
43 {
44 if (k > 0)
45 {
46 columnValue += "\t";
47 }
48 if (dgv.Rows[j].Cells[k].Value == null)
49 columnValue += "";
50 else
51 columnValue += dgv.Rows[j].Cells[k].Value.ToString().Trim();
52 }
53 sw.WriteLine(columnValue);
54 }
55 sw.Close();
56 myStream.Close();
57 }
58 catch (Exception e)
59 {
60 MessageBox.Show(e.ToString());
61 }
62 finally
63 {
64 sw.Close();
65 myStream.Close();
66 }
67 }
68 }
69
三、附注：
虽然都是实现导出excel的功能，但在asp.net和winform的程序中，实现的代码是各不相同的。在asp.net中，是在服务器端读取数据，在服务器端把数据以ms-excel的格式，以Response输出到浏览器（客户端)；而在winform中，是把数据读到客户端（因为winform运行端就是客户端），然后调用客户端安装的office组件，将读到的数据写在excel