C#向excel中写入数据的三种方式

第一种：将DataGrid中的数据以流的形式写到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");

// 如果设置为GetEncoding("GB2312");导出的文件将会出现乱码！！！

Response.ContentEncoding = System.Text.Encoding.UTF8;

Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。

//Response.ContentType = "application/vnd.ms-excel";//输出类型

//Response.Charset = "";

//关闭ViewState

EnableViewState = false;

System.IO.StringWriter tw = new System.IO.StringWriter();//将信息写入字符串

System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);//在WEB窗体页上写出一系列连续的HTML特定字符和文本。

//此类提供ASP.NET服务器控件在将HTML内容呈现给客户端时所使用的格式化功能

//获取control的HTML

dg.RenderControl(hw);//将table中的内容输出到HtmlTextWriter对象中

// 把HTML写回浏览器

Response.Write(tw.ToString());

Response.Flush();

Response.End();

第二种：将数据源中的数据以文件流的形式写到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为写作准备;

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");

第三种：将数据源中的数据直接写到excel中，格式以xls形式存在，好处导出的

数据可以直接导入，可以将数字格式自动转化为文本格式，可以减少

格式转化的繁琐环节，还可以预留将数字转换为文本的格式的行数，

可以完全自定义

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) //判断文件是否已经存在,如果存在就删除!

{

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;

}