第一種：將DataGrid中的數據以流的形式寫到excel中，格式以html的形式存在
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=DialoutTemplate.xls");
// 如果設置為GetEncoding("GB2312");導出的文件將會出現亂碼！！！
Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.ContentType = "application/ms-excel";//設置輸出文件類型為excel文件。
//Response.ContentType = "application/vnd.ms-excel";//輸出類型
//Response.Charset = "";
//關閉ViewState
EnableViewState = false;
System.IO.StringWriter tw = new System.IO.StringWriter();//將信息寫入字符串
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);//在WEB窗體頁上寫出一系列連續的HTML特定字符和文本。
//此類提供ASP.NET服務器控件在將HTML內容呈現給客戶端時所使用的格式化功能
//獲取control的HTML
dg.RenderControl(hw);//將table中的內容輸出到HtmlTextWriter對象中
// 把HTML寫回浏覽器
Response.Write(tw.ToString());
Response.Flush();
Response.End();
第二種：將數據源中的數據以文件流的形式寫到excel中，格式以txt的形式存在
FileStream fs = new FileStream(Server.MapPath("report_export/DialoutTemplate.xls"), FileMode.Create, FileAccess.Write);
StreamWriter rw = new StreamWriter(fs, Encoding.Default);//建立StreamWriter為寫作准備;
DataTable dt = GetDataTableSource();
int count = dt.Columns.Count;
string head = "";
string values = "";
for (int i = 0; i < count; i++)
{
string h = dt.Columns[i].ColumnName + "\t";
string v = dt.Rows[0][i].ToString() + "\t";
head += h;
values += v;
}
rw.WriteLine(head);
rw.WriteLine(values);
rw.Close();
fs.Close();
Response.Redirect("report_export/DialoutTemplate.xls");
第三種：將數據源中的數據直接寫到excel中，格式以xls形式存在，好處導出的
數據可以直接導入，可以將數字格式自動轉化為文本格式，可以減少
格式轉化的繁瑣環節，還可以預留將數字轉換為文本的格式的行數，
可以完全自定義
Excel.Application xlApp;
Excel.Workbook xlBook;
Excel.Workbooks xlBooks;
//Excel.Range xlRange;
Excel.Sheets xlsheets;
Excel.Worksheet xlSheet;
int k = 0;
try
{
string strCurrentPath = Server.MapPath("report_export/DialoutTemplate.xls");
string FilePath = strCurrentPath;
FileInfo fi = new FileInfo(FilePath);
if (fi.Exists) //判斷文件是否已經存在,如果存在就刪除!
{
fi.Delete();
}
xlApp = new Excel.Application();
xlBooks = xlApp.Workbooks;
xlBook = xlBooks.Add(Type.Missing);
xlsheets = xlBook.Worksheets;
IntPtr intptr = new IntPtr(xlApp.Hwnd);
xlSheet = (Excel.Worksheet)xlsheets.get_Item(1);
DataTable dt = GetDataTableSource();
int count = dt.Columns.Count;
for (int i = 0; i < count; i++)
{
string h = dt.Columns[i].ColumnName;
string v = dt.Rows[0][i].ToString();
((Excel.Range)xlSheet.Cells[1, i + 1]).Value2 = h;
Excel.Range r1 = xlSheet.get_Range(xlSheet.Cells[1, 1], xlSheet.Cells[1, i + 1]);
r1.NumberFormatLocal = "@";
((Excel.Range)xlSheet.Cells[2, i + 1]).Value2 = v;
Excel.Range r2 = xlSheet.get_Range(xlSheet.Cells[2, 1], xlSheet.Cells[2, i + 1]);
r2.NumberFormatLocal = "@";
}
for (int j = 1; j < 500; j++)
{
Excel.Range r = xlSheet.get_Range(xlSheet.Cells[2 + j, 1], xlSheet.Cells[2 + j, count]);
r.NumberFormatLocal = "@";
}
xlBook.SaveAs(FilePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
xlBook.Close(false, Type.Missing, Type.Missing);
xlBooks.Close();
xlApp.Quit();
Response.Redirect("report_export/DialoutTemplate.xls");
GetWindowThreadProcessId(intptr, out k);
System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(k);
p.Kill();
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
finally
{
//xlRange = null;
xlSheet = null;
xlBook = null;
xlApp = null;
}
摘自 飛哥的專欄
