2、方法2：
protected void ExportExcel()
{
gridbind();
if(ds1==null) return;
string saveFileName="";
// bool fileSaved=false;
SaveFileDialog saveDialog=new SaveFileDialog();
saveDialog.DefaultExt ="xls";
saveDialog.Filter="Excel文件|*.xls";
saveDialog.FileName ="Sheet1";
saveDialog.ShowDialog();
saveFileName=saveDialog.FileName;
if(saveFileName.IndexOf(":")<0) return; //被點了取消
// Excelapp.Workbooks.Open (App.path & 工程進度表.xls)
Excel.Application xlApp=new Excel.Application();
object missing=System.Reflection.Missing.Value;
if(xlApp==null)
{
MessageBox.Show("無法創建Excel對象，可能您的機子未安裝Excel");
return;
}
Excel.Workbooks workbooks=xlApp.Workbooks;
Excel.Workbook workbook=workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet=(Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
Excel.Range range;
string oldCaption=Title_label .Text.Trim ();
long totalCount=ds1.Tables[0].Rows.Count;
long rowRead=0;
float percent=0;
worksheet.Cells[1,1]=Title_label .Text.Trim ();
//寫入字段
for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
{
worksheet.Cells[2,i+1]=ds1.Tables[0].Columns.ColumnName;
range=(Excel.Range)worksheet.Cells[2,i+1];
range.Interior.ColorIndex = 15;
range.Font.Bold = true;
}
//寫入數值
Caption .Visible = true;
for(int r=0;r<ds1.Tables[0].Rows.Count;r++)
{
for(int i=0;i<ds1.Tables[0].Columns.Count;i++)
{
worksheet.Cells[r+3,i+1]=ds1.Tables[0].Rows[r];
}
rowRead++;
percent=((float)(100*rowRead))/totalCount;
this.Caption.Text= "正在導出數據["+ percent.ToString("0.00") +"%]...";
Application.DoEvents();
}
worksheet.SaveAs(saveFileName,missing,missing,missing,missing,missing,missing,missing,missing);
this.Caption.Visible= false;
this.Caption.Text= oldCaption;
range=worksheet.get_Range(worksheet.Cells[2,1],worksheet.Cells[ds1.Tables[0].Rows.Count+2,ds1.Tables[0].Columns.Count]);
range.BorderAround(Excel.XlLineStyle.xlContinuous,Excel.XlBorderWeight.xlThin,Excel.XlColorIndex.xlColorIndexAutomatic,null);
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Excel.XlColorIndex.xlColorIndexAutomatic;
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle =Excel.XlLineStyle.xlContinuous;
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight =Excel.XlBorderWeight.xlThin;
if(ds1.Tables[0].Columns.Count>1)
{
range.Borders[Excel.XlBordersIndex.xlInsideVertical].ColorIndex=Excel.XlColorIndex.xlColorIndexAutomatic;
}
workbook.Close(missing,missing,missing);
xlApp.Quit();
}
三、附注：
雖然都是實現導出execl的功能，但在asp.net和winform的程序中，實現的代碼是各不相同的。在ASP.Net中，是在服務器端讀取數據，在服務器端把數據以ms-execl的格式，以Response輸出到浏覽器（客戶端)；而在winform中，是把數據讀到客戶端（因為winform運行端就是客戶端），然後調用客戶端安裝的Office組件，將讀到的數據寫在execl的工作簿中。
