Dataset里面只有一个TABLE,他们是程序运行中产生的,在内存中
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一用水晶报表绑定dataset
然后直接生成excel二
先将你的dataset中的数据绑定到一个DataGrid上,
然后利用如下代码即可将dataset中的数据导出excel ...
HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=Excel.xls");
Response.ContentType = "application/vnd.ms-excel";
HttpContext.Current.Response.Charset ="";
HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.Default;
dgTest.Page.EnableViewState =false;
System.IO.StringWriter tw = new System.IO.StringWriter() ;
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
dgTest.Visible=true;
dgTest.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();
// 导出列表信息到Excel
public static void gSendGridInfoToExcel(DataGrid GridX)
{
Excel.Application excel= new Excel.ApplicationClass();
Excel._Workbook xBk = excel.Workbooks.Add(true);
Excel._Worksheet xSt = (Excel._Worksheet)xBk.ActiveSheet;
Excel.Range excelCell=null;
try
{
//赋值对象
object[] objarr;
DataTable dtTest=new DataTable();;
int i,j;
int iRows,iCows;
int iVisable;
iVisable=0;
iCows=0;
ArrayList list=new ArrayList();
//如果绑定数据源是DataTable和DataSet,取得行数
if (GridX.DataSource is System.Data.DataSet || GridX.DataSource is System.Data.DataTable)
{
dtTest=(DataTable)GridX.DataSource;
iRows=dtTest.Rows.Count;
}
else if (GridX.DataSource is System.Data.DataView)
{
DataView dvTest=(DataView)GridX.DataSource;
iRows=dvTest.Count;
dtTest=dvTest.Table;
}
//如果是集合取得行数
else
{
System.Collections.CollectionBase ColTest;
ColTest=(System.Collections.CollectionBase)GridX.DataSource;
iRows=ColTest.Count;
}
//如果有TableStyles则根据TableStyles取得(标题行)
if (GridX.TableStyles.Count>0)
{
iCows=GridX.TableStyles[0].GridColumnStyles.Count;
for(i=0;i<iCows;i++)
{
if(GridX.TableStyles[0].GridColumnStyles[i].Width>0)
{
iVisable++;
list.Add(GridX.TableStyles[0].GridColumnStyles[i].HeaderText);
} }
objarr = new object[iVisable];
objarr=list.ToArray();
excelCell = xSt.get_Range(excel.Cells[1,1],excel.Cells[1,iVisable]);
excelCell.Value2 = objarr;
//数据行
for(i=0;i<iRows;i++)
{
objarr = new object[iVisable];
list.Clear(); for(j=0;j<iCows;j++)
{
if(GridX.TableStyles[0].GridColumnStyles[j].Width>0)
{
list.Add("'"+GridX[i,j].ToString().Replace("\n",""));
} }
if (list.Equals(System.DBNull.Value))
{
break;
}
objarr=list.ToArray();
excelCell = xSt.get_Range(excel.Cells[i+2,1],excel.Cells[i+2,iVisable]);
excelCell.Value2 = objarr;
}
}
else
{
iCows=dtTest.Columns.Count;
for(i=0;i<iCows;i++)
{
list.Add(dtTest.Columns[i].Caption);
}
objarr = new object[iCows];
objarr=list.ToArray();
excelCell = xSt.get_Range(excel.Cells[1,1],excel.Cells[1,iCows]);
excelCell.Value2 = objarr; //数据行
for(i=0;i<iRows;i++)
{
objarr = new object[iCows];
list.Clear(); for(j=0;j<iCows;j++)
{
list.Add("'"+GridX[i,j].ToString().Replace("\n",""));
}
if (list.Equals(System.DBNull.Value))
{
break;
}
objarr=list.ToArray();
excelCell = xSt.get_Range(excel.Cells[i+2,1],excel.Cells[i+2,iCows]);
excelCell.Value2 = objarr;
} }
dtTest.Dispose(); excel.Visible=true; }
catch (System.Exception e)
{
throw e;
}
finally
{
excelCell=null;
xBk=null;
xSt=null;
excel=null;
GC.Collect();
} } }