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怎么将 DataTable 直接生成 Excel

热度:5099   发布时间:2013-02-25 00:00:00
如何将 DataTable 直接生成 Excel
如何将 DataTable 生成Excel ??

我说的是在后台直接将 DataTable 生成 Excel 文件

------解决方案--------------------------------------------------------
网上有很多方法, Such as

C# code
/// <summary>/// 生成Excel文件/// </summary>/// <param name="ds">数据集</param>/// <param name="fileName">生成文件名</param>private void CreateExcel(DataTable dt, string fileName){    HttpResponse resp;    resp = Page.Response;    resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");    resp.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);    string colHeaders = "", ls_item = "";    ////定义表对象与行对象,同时用DataSet对其值进行初始化    //DataTable dt = ds.Tables[0];    DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的    int i = 0;    int cl = dt.Columns.Count;    //取得数据表各列标题,各标题之间以t分割,最后一个列标题后加回车符    for (i = 0; i < cl; i++)    {        if (i == (cl - 1))//最后一列,加n        {            colHeaders += dt.Columns[i].Caption.ToString() + "\n";        }        else        {            colHeaders += dt.Columns[i].Caption.ToString() + "\t";        }    }    resp.Write(colHeaders);    //向HTTP输出流中写入取得的数据信息    //逐行处理数据     foreach (DataRow row in myRow)    {        //当前行数据写入HTTP输出流,并且置空ls_item以便下行数据           for (i = 0; i < cl; i++)        {            if (i == (cl - 1))//最后一列,加n            {                ls_item += row[i].ToString() + "\n";            }            else            {                ls_item += row[i].ToString() + "\t";            }        }        resp.Write(ls_item);        ls_item = "";    }    resp.End(); }
------解决方案--------------------------------------------------------
public static bool ExportToExcel(DataTable table, string excelName, int[] columnIndexs, string[] columnHeads)
{
Excel.ApplicationClass oExcel = new Excel.ApplicationClass();
Excel.Workbook obook = null;
Excel.Worksheet oSheet = null;
Excel.Range range = null;
#endregion
try
{
obook = oExcel.Workbooks.Add("");
oSheet = (Excel.Worksheet)obook.Worksheets[1];
int rCount, cCount;
rCount = table.Rows.Count;
cCount = table.Columns.Count;
object obj = System.Reflection.Missing.Value;

if (cCount < columnIndexs.Length || cCount < columnHeads.Length)
{
throw new ArgumentOutOfRangeException("columnIndexs 与 columnHeads 长度必须一致。");
}
for (int i = 1; i <= columnIndexs.Length; i++)
{

range = (Excel.Range)oSheet.Columns.get_Item(i, obj);
range.NumberFormatLocal = "@";
}
for (int c = 0; c < columnIndexs.Length; c++)
{
oSheet.Cells[1, c + 1] = columnHeads[c];
for (int r = 1; r <= rCount; r++)
{
oSheet.Cells[r + 1, c + 1] = table.Rows[r - 1][columnIndexs[c]].ToString();
}
}
obook.SaveCopyAs(excelName);
obook.Close(false, System.Reflection.Missing.Value, System.Reflection.Missing.Value);
return true;
}
catch (Exception ex)
{
throw ex;
}
finally
{
ystem.Runtime.InteropServices.Marshal.ReleaseComObject(range);
System.Runtime.InteropServices.Marshal.ReleaseComObject(oSheet);
System.Runtime.InteropServices.Marshal.ReleaseComObject(obook);

oExcel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(oExcel);

GC.Collect();
}
}
------解决方案--------------------------------------------------------
http://www.cnblogs.com/ghostljj/archive/2008/09/05/629336
------解决方案--------------------------------------------------------
参考
------解决方案--------------------------------------------------------
C# code
DataTable dt=ds.Tables["table1"];             StringWriter sw=new StringWriter();             sw.WriteLine("自动编号\t姓名\tSid");              foreach(DataRow dr in dt.Rows)             {                 sw.WriteLine(dr["pID"]+"\t"+dr["pName"]+"\t"+dr["pSexID"]);             }              sw.Close();             Response.AddHeader("Content-Disposition", "attachment; filename=test.xls");             Response.ContentType = "application/ms-excel";             Response.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");             Response.Write(sw);             Response.End();
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