1、读取路径按钮
private void button1_Click(object sender, EventArgs e)//选取文件 { OpenFileDialog openFileDialog1 = new OpenFileDialog(); if (openFileDialog1.ShowDialog() == DialogResult.OK) { if (openFileDialog1.FileName != "") { this.textBox1.Text = openFileDialog1.FileName; } } }
2、根据路径读取csv文件值datatable
class Csv2DT { /// <summary> /// 将Csv读入DataTable /// </summary> /// <param name="filePath">csv文件路径</param> /// <param name="n">表示第n行是字段title,第n+1行是记录开始</param> /// <param name="k">可选参数表示最后K行不算记录默认0</param> public static DataTable csv2dt(string filePath, int n, DataTable dt) //这个dt 是个空白的没有任何行列的DataTable { String csvSplitBy = "(?<=^|,)("(?:[^"]|"")*"|[^,]*)"; StreamReader reader = new StreamReader(filePath, System.Text.Encoding.Default, false); int i = 0, m = 0; reader.Peek(); while (reader.Peek() > 0) { m = m + 1; string str = reader.ReadLine(); if (m >= n + 1) { if (m == n + 1) //如果是字段行，则自动加入字段。 { MatchCollection mcs = Regex.Matches(str, csvSplitBy); foreach (Match mc in mcs) { dt.Columns.Add(mc.Value); //增加列标题 } } else { MatchCollection mcs = Regex.Matches(str, "(?<=^|,)("(?:[^"]|"")*"|[^,]*)"); i = 0; System.Data.DataRow dr = dt.NewRow(); foreach (Match mc in mcs) { dr[i] = mc.Value; i++; } dt.Rows.Add(dr); //DataTable 增加一行 } } } return dt; } }
3、从datagridview取数导出excel
class microsoftoutputexcel { public static void outexcel(DataGridView dataGridView1) { string fileName = ""; string saveFileName = ""; SaveFileDialog saveDialog = new SaveFileDialog(); saveDialog.DefaultExt = "xls"; saveDialog.Filter = "Excel(*.xls)|*.xls|Excel(2007-2016)(*.xlsx)|*.xlsx"; saveDialog.FileName = fileName; saveDialog.ShowDialog(); saveFileName = saveDialog.FileName; if (saveFileName.IndexOf(":") < 0) return; //被点了取消 Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { MessageBox.Show("无法创建Excel对象，您的电脑可能未安装Excel"); return; } Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 //写入标题 for (int i = 0; i < dataGridView1.ColumnCount; i++) { worksheet.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText; } //写入数值 for (int r = 0; r < dataGridView1.Rows.Count; r++) { for (int i = 0; i < dataGridView1.ColumnCount; i++) { worksheet.Cells[r + 2, i + 1] = dataGridView1.Rows[r].Cells[i].Value; } System.Windows.Forms.Application.DoEvents(); } worksheet.Columns.EntireColumn.AutoFit();//列宽自适应 MessageBox.Show(fileName + "资料保存成功", "提示", MessageBoxButtons.OK); if (saveFileName != "") { try { workbook.Saved = true; workbook.SaveCopyAs(saveFileName); //fileSaved = true; } catch (Exception ex) {//fileSaved = false; MessageBox.Show("导出文件时出错,文件可能正被打开！ " + ex.Message); } } xlApp.Quit(); GC.Collect();//强行销毁 } } }
4、从datatable取数导出excel（1）
class datatable2excel { public static void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName) { if (tmpDataTable == null) return; int rowNum = tmpDataTable.Rows.Count; int columnNum = tmpDataTable.Columns.Count; int rowIndex = 1; int columnIndex = 0; Microsoft.Office.Interop.Excel.Application xlApp = new ApplicationClass(); xlApp.DefaultFilePath = ""; xlApp.DisplayAlerts = true; xlApp.SheetsInNewWorkbook = 1; Workbook xlBook = xlApp.Workbooks.Add(true); //将DataTable的列名导入Excel表第一行 foreach (DataColumn dc in tmpDataTable.Columns) { columnIndex++; xlApp.Cells[rowIndex, columnIndex] = dc.ColumnName; } //将DataTable中的数据导入Excel中 for (int i = 0; i < rowNum; i++) { rowIndex++; columnIndex = 0; for (int j = 0; j < columnNum; j++) { columnIndex++; xlApp.Cells[rowIndex, columnIndex] = tmpDataTable.Rows[i][j].ToString(); } } //xlBook.SaveCopyAs(HttpUtility.UrlDecode(strFileName, System.Text.Encoding.UTF8)); xlBook.SaveCopyAs(strFileName); } }
5、从datatable取数导出excel（2）
class finallyoutexcel { /// <summary> /// 将DataTable数据导出到Excel表 /// </summary> /// <param name="tmpDataTable">要导出的DataTable</param> /// <param name="strFileName">Excel的保存路径及名称</param> public void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName) { if (tmpDataTable == null) { return; } long rowNum = tmpDataTable.Rows.Count;//行数 int columnNum = tmpDataTable.Columns.Count;//列数 Microsoft.Office.Interop.Excel.Application m_xlApp = new Microsoft.Office.Interop.Excel.Application(); m_xlApp.DisplayAlerts = false;//不显示更改提示 m_xlApp.Visible = false; Microsoft.Office.Interop.Excel.Workbooks workbooks = m_xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 try { if (rowNum > 65536)//单张Excel表格最大行数 { long pageRows = 65535;//定义每页显示的行数,行数必须小于65536 int scount = (int)(rowNum / pageRows);//导出数据生成的表单数 if (scount * pageRows < rowNum)//当总行数不被pageRows整除时，经过四舍五入可能页数不准 { scount = scount + 1; } for (int sc = 1; sc <= scount; sc++) { if (sc > 1) { object missing = System.Reflection.Missing.Value; worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add( missing, missing, missing, missing);//添加一个sheet } else { worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[sc];//取得sheet1 } string[,] datas = new string[pageRows + 1, columnNum]; for (int i = 0; i < columnNum; i++) //写入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption;//表头信息 } Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int init = int.Parse(((sc - 1) * pageRows).ToString()); int r = 0; int index = 0; int result; if (pageRows * sc >= rowNum) { result = (int)rowNum; } else { result = int.Parse((pageRows * sc).ToString()); } for (r = init; r < result; r++) { index = index + 1; for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式 } System.Windows.Forms.Application.DoEvents(); //添加进度条 } Microsoft.Office.Interop.Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。 m_xlApp.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMaximized;//Sheet表最大化 range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } } else { string[,] datas = new string[rowNum + 1, columnNum]; for (int i = 0; i < columnNum; i++) //写入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption; } Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int r = 0; for (r = 0; r < rowNum; r++) { for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式 } System.Windows.Forms.Application.DoEvents(); //添加进度条 } Microsoft.Office.Interop.Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。 m_xlApp.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMaximized; range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } workbook.Saved = true; workbook.SaveCopyAs(strFileName); } catch (Exception ex) { MessageBox.Show("导出异常：" + ex.Message, "导出异常", MessageBoxButtons.OK, MessageBoxIcon.Warning); } finally { EndReport(m_xlApp); } } /// <summary> /// 退出报表时关闭Excel和清理垃圾Excel进程 /// </summary> private void EndReport(Microsoft.Office.Interop.Excel.Application m_xlApp) { object missing = System.Reflection.Missing.Value; try { m_xlApp.Workbooks.Close(); m_xlApp.Workbooks.Application.Quit(); m_xlApp.Application.Quit(); m_xlApp.Quit(); } catch { } finally { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Workbooks); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Application); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp); m_xlApp = null; } catch { } try { //清理垃圾进程 this.killProcessThread(); } catch { } GC.Collect(); } } /// <summary> /// 杀掉不死进程 /// </summary> private void killProcessThread() { ArrayList myProcess = new ArrayList(); for (int i = 0; i < myProcess.Count; i++) { try { System.Diagnostics.Process.GetProcessById(int.Parse((string)myProcess[i])).Kill(); } catch { } } } }
6、从datatable取数导出excel（3）
class finallyoutexcel1 { /// <summary> /// 将DataTable数据导出到Excel表 /// </summary> /// <param name="tmpDataTable">要导出的DataTable</param> /// <param name="strFileName">Excel的保存路径及名称</param> public void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName) { if (tmpDataTable == null) { return; } long rowNum = tmpDataTable.Rows.Count;//行数 int columnNum = tmpDataTable.Columns.Count;//列数 Microsoft.Office.Interop.Excel.Application m_xlApp = new Microsoft.Office.Interop.Excel.Application(); m_xlApp.DisplayAlerts = false;//不显示更改提示 m_xlApp.Visible = false; Microsoft.Office.Interop.Excel.Workbooks workbooks = m_xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 try { if (rowNum > 65536)//单张Excel表格最大行数 { long pageRows = 65535;//定义每页显示的行数,行数必须小于65536 int scount = (int)(rowNum / pageRows);//导出数据生成的表单数 if (scount * pageRows < rowNum)//当总行数不被pageRows整除时，经过四舍五入可能页数不准 { scount = scount + 1; } for (int sc = 1; sc <= scount; sc++) { if (sc > 1) { object missing = System.Reflection.Missing.Value; worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add( missing, missing, missing, missing);//添加一个sheet } else { worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[sc];//取得sheet1 } string[,] datas = new string[pageRows + 1, columnNum]; for (int i = 0; i < columnNum; i++) //写入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption;//表头信息 } Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int init = int.Parse(((sc - 1) * pageRows).ToString()); int r = 0; int index = 0; int result; if (pageRows * sc >= rowNum) { result = (int)rowNum; } else { result = int.Parse((pageRows * sc).ToString()); } for (r = init; r < result; r++) { index = index + 1; for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; datas[index, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式 } System.Windows.Forms.Application.DoEvents(); //添加进度条 } Microsoft.Office.Interop.Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。 m_xlApp.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMaximized;//Sheet表最大化 range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[index + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } } else { string[,] datas = new string[rowNum + 1, columnNum]; for (int i = 0; i < columnNum; i++) //写入字段 { datas[0, i] = tmpDataTable.Columns[i].Caption; } Microsoft.Office.Interop.Excel.Range range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, columnNum]); range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Bold = true; range.Font.Size = 9; int r = 0; for (r = 0; r < rowNum; r++) { for (int i = 0; i < columnNum; i++) { object obj = tmpDataTable.Rows[r][tmpDataTable.Columns[i].ToString()]; string str1 = obj.ToString(); datas[r + 1, i] = obj == null ? "" : "'" + obj.ToString().Trim();//在obj.ToString()前加单引号是为了防止自动转化格式 } System.Windows.Forms.Application.DoEvents(); //添加进度条 } Microsoft.Office.Interop.Excel.Range fchR = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); fchR.Value2 = datas; worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。 m_xlApp.WindowState = Microsoft.Office.Interop.Excel.XlWindowState.xlMaximized; range = worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[rowNum + 1, columnNum]); //range.Interior.ColorIndex = 15;//15代表灰色 range.Font.Size = 9; range.RowHeight = 14.25; range.Borders.LineStyle = 1; range.HorizontalAlignment = 1; } workbook.Saved = true; workbook.SaveCopyAs(strFileName); } catch (Exception ex) { MessageBox.Show("导出异常：" + ex.Message, "导出异常", MessageBoxButtons.OK, MessageBoxIcon.Warning); } finally { EndReport(m_xlApp); } } /// <summary> /// 退出报表时关闭Excel和清理垃圾Excel进程 /// </summary> private void EndReport(Microsoft.Office.Interop.Excel.Application m_xlApp) { object missing = System.Reflection.Missing.Value; try { m_xlApp.Workbooks.Close(); m_xlApp.Workbooks.Application.Quit(); m_xlApp.Application.Quit(); m_xlApp.Quit(); } catch { } finally { try { System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Workbooks); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp.Application); System.Runtime.InteropServices.Marshal.ReleaseComObject(m_xlApp); m_xlApp = null; } catch { } try { //清理垃圾进程 this.killProcessThread(); } catch { } GC.Collect(); } } /// <summary> /// 杀掉不死进程 /// </summary> private void killProcessThread() { ArrayList myProcess = new ArrayList(); for (int i = 0; i < myProcess.Count; i++) { try { System.Diagnostics.Process.GetProcessById(int.Parse((string)myProcess[i])).Kill(); } catch { } } } }
