/// <summary>
/// DataGridView添加行号
/// </summary>
/// <param name="dgv">DataGridView控件ID</param>
public static void AddRowIndex(this DataGridView dgv)
{
dgv.RowPostPaint += delegate(object sender, DataGridViewRowPostPaintEventArgs e)
{
SolidBrush b = new SolidBrush(dgv.RowHeadersDefaultCellStyle.ForeColor);
e.Graphics.DrawString((e.RowIndex + 1).ToString(), dgv.DefaultCellStyle.Font, b, e.RowBounds.Location.X + 10, e.RowBounds.Location.Y + 4);
};
}
/// <summary>
/// DataGridView添加全选
/// </summary>
/// <param name="dgv">DataGridView控件ID</param>
/// <param name="columnIndex">全选所在列序号</param>
public static void AddFullSelect(this DataGridView dgv, int columnIndex)
{
if (dgv.Rows.Count < 1)
{
return;
}
CheckBox ckBox = new CheckBox();
Rectangle rect = dgv.GetCellDisplayRectangle(1, -1, true);
ckBox.Size = new Size(dgv.Columns[1].Width - 12, 12); //大小
Point point = new Point(rect.X + 10, rect.Y + 3);//位置
ckBox.Location = point;
ckBox.CheckedChanged += delegate(object sender, EventArgs e)
{
for (int i = 0; i < dgv.Rows.Count; i++)
{
dgv.Rows[i].Cells[columnIndex].Value = ((CheckBox)sender).Checked;
}
dgv.EndEdit();
};
dgv.Controls.Add(ckBox);
}
/// <summary>
/// 导出到Excel（通过引用excel组件导出）
/// </summary>
/// <param name="dgv">DataGridView控件ID</param>
public static void ExportExcel(this DataGridView dgv)
{
if (dgv.Rows.Count == 0)
return;
//实例化一个Excel.Application对象
Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
try
{
//让后台执行设置为不可见，为true的话会看到打开一个Excel，然后数据在往里写
excel.Visible = false;
//设置禁止弹出保存和覆盖的询问提示框
excel.DisplayAlerts = false;
excel.AlertBeforeOverwriting = false;
//新增加一个工作簿，Workbook是直接保存，不会弹出保存对话框，加上Application会弹出保存对话框，值为false会报错
excel.Application.Workbooks.Add(true);
//生成Excel中列头名称
for (int i = 0; i < dgv.Columns.Count; i++)
{
excel.Cells[1, i + 1] = dgv.Columns[i].HeaderText;
}
//把DataGridView当前页的数据保存在Excel中
for (int i = 0; i < dgv.Rows.Count; i++)
{
for (int j = 0; j < dgv.Columns.Count; j++)
{
if (dgv[j, i].ValueType == typeof(string))
{
excel.Cells[i + 2, j + 1] = "'" + dgv[j, i].Value.ToString();
}
else
{
excel.Cells[i + 2, j + 1] = dgv[j, i].Value.ToString();
}
}
}
//保存excel文件
excel.Save(System.AppDomain.CurrentDomain.BaseDirectory + "temp.xls");
}
catch
{
}
finally
{
excel.Quit();
System.Runtime.InteropServices.Marshal.FinalReleaseComObject(excel);
excel = null;
GC.Collect();
}
}
/// <summary>
/// 导出到Excel（通过生成html导出）
/// </summary>
/// <param name="dgv">DataGridView控件ID</param>
public static void ExportExcel(this DataGridView dgv)
{
if (dgv.Rows.Count == 0)
return;
const string HEADER = "<html xmlns:x=\"urn:schemas-microsoft-com:office:excel\">" +
"<meta http-equiv=Content-Type content=\"text/html; charset=\"gb2312\">" +
"<head>" +
"<!--[if gte mso 9]><xml>" +
"<x:ExcelWorkbook>" +
"<x:ExcelWorksheets>" +
"<x:ExcelWorksheet>" +
"<x:Name>工作表标题</x:Name>" +
"<x:WorksheetOptions>" +
"<x:Print>" +
"<x:ValidPrinterInfo />" +
"</x:Print>" +
"</x:WorksheetOptions>" +
"</x:ExcelWorksheet>" +
"</x:ExcelWorksheets>" +
"</x:ExcelWorkbook>" +
"</xml>" +
"<![endif]-->";
const string STYLE = "<style type=\"text/css\">" +
".text" +
" {" +
" vnd.ms-excel.numberformat:@;" +
" }" +
"</style>";
using(SaveFileDialog saveFileDialog = new SaveFileDialog())
{
saveFileDialog.Title = "导出Excel文件到";
saveFileDialog.Filter = "Execl files(*.xls)|All Files(*.*)";
saveFileDialog.FileName = DateTime.Now.ToString("yyyyMMdd_HHmmss") + ".xls";
saveFileDialog.AddExtension = true;
saveFileDialog.RestoreDirectory = true;
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
using (StreamWriter writer = new StreamWriter(saveFileDialog.FileName, false, System.Text.Encoding.GetEncoding("gb2312"), 1024))
{
writer.WriteLine(HEADER);
writer.WriteLine(STYLE);
writer.WriteLine("</head><body><table border=\"1\" style=\"font-size:9pt\"><tr>");
for (int i = 0; i < dgv.Columns.Count; i++)
{
writer.WriteLine(string.Format("<th>{0}</th>", dgv.Columns[i].HeaderText));
}
for (int i = 0; i < dgv.Rows.Count; i++)
{
writer.WriteLine("<tr>");
for (int j = 0; j < dgv.Columns.Count; j++)
{
writer.WriteLine(string.Format("<td class=\"text\">{0}</td>", dgv[j, i].Value.ToString()));
}
writer.WriteLine("</tr>");
}
writer.WriteLine("</table></body>");
}
}
}
}