我想用StreamWrite将DataTable生成Excel
StreamWriter Mywrite = new StreamWriter(Url,true,System.Text.Encoding.Default);
string LineText = "";
//生成头
for(int i=0;i<dt.Columns.Count;i++)
{
if(i!=dt.Columns.Count-1)
{
LineText += dt.Columns[i].ColumnName.ToString()+"\t";
}
else
{
LineText += dt.Columns[i].ColumnName.ToString();
}
}
Mywrite.WriteLine(LineText);
//生成数据
for(int i=0;i<dt.Rows.Count;i++)
{
LineText ="";
for(int a=0;a<dt.Columns.Count;a++)
{
if(a!=dt.Columns.Count-1)
{
LineText += dt.Rows[i][a].ToString()+"\t";
}
else
{
LineText += dt.Rows[i][a].ToString();
}
}
Mywrite.WriteLine(LineText); }
Mywrite.Close();这样写会有权限问题,如何解决呢?
StreamWriter Mywrite = new StreamWriter(Url,true,System.Text.Encoding.Default);
string LineText = "";
//生成头
for(int i=0;i<dt.Columns.Count;i++)
{
if(i!=dt.Columns.Count-1)
{
LineText += dt.Columns[i].ColumnName.ToString()+"\t";
}
else
{
LineText += dt.Columns[i].ColumnName.ToString();
}
}
Mywrite.WriteLine(LineText);
//生成数据
for(int i=0;i<dt.Rows.Count;i++)
{
LineText ="";
for(int a=0;a<dt.Columns.Count;a++)
{
if(a!=dt.Columns.Count-1)
{
LineText += dt.Rows[i][a].ToString()+"\t";
}
else
{
LineText += dt.Rows[i][a].ToString();
}
}
Mywrite.WriteLine(LineText); }
Mywrite.Close();这样写会有权限问题,如何解决呢?
{
// HttpContext.Current.Response.Charset ="GB2312";
HttpContext.Current.Response.Charset ="";
HttpContext.Current.Response.AppendHeader("Content-Disposition","attachment;filename=money.xls");
HttpContext.Current.Response.ContentEncoding =System.Text.Encoding.GetEncoding("GB2312");
HttpContext.Current.Response.ContentType ="application/ms-excel";//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword
ctl.Page.EnableViewState =false;
System.IO.StringWriter tw = new System.IO.StringWriter() ;
System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);
ctl.RenderControl(hw);
HttpContext.Current.Response.Write(tw.ToString());
HttpContext.Current.Response.End();
}然后再调用:ToExcel(datagrid1)
{
//
// TODO: 在此处添加构造函数逻辑
//
//dv为要输出到Excel的数据,str为标题名称
GC.Collect();
Application excel;// = new Application();
int rowIndex=4;
int colIndex=1; _Workbook xBk;
_Worksheet xSt; excel= new ApplicationClass();
xBk = excel.Workbooks.Add(true);
xSt = (_Worksheet)xBk.ActiveSheet; //
//取得标题
//
foreach(DataColumn col in dv.Table.Columns)
{
colIndex++;
excel.Cells[4,colIndex] = col.ColumnName;
xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[4,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置标题格式为居中对齐
} //
//取得表格中的数据
//
foreach(DataRowView row in dv)
{
rowIndex ++;
colIndex = 1;
foreach(DataColumn col in dv.Table.Columns)
{
colIndex ++;
if(col.DataType == System.Type.GetType("System.DateTime"))
{
excel.Cells[rowIndex,colIndex] = (Convert.ToDateTime(row[col.ColumnName].ToString())).ToString("yyyy-MM-dd");
xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置日期型的字段格式为居中对齐
}
else
if(col.DataType == System.Type.GetType("System.String"))
{
excel.Cells[rowIndex,colIndex] = "'"+row[col.ColumnName].ToString();
xSt.get_Range(excel.Cells[rowIndex,colIndex],excel.Cells[rowIndex,colIndex]).HorizontalAlignment = XlVAlign.xlVAlignCenter;//设置字符型的字段格式为居中对齐
}
else
{
excel.Cells[rowIndex,colIndex] = row[col.ColumnName].ToString();
}
}
}
//
//加载一个合计行
//
int rowSum = rowIndex + 1;
int colSum = 2;
excel.Cells[rowSum,2] = "合计";
xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,2]).HorizontalAlignment = XlHAlign.xlHAlignCenter;
//
//设置选中的部分的颜色
//
xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Select();
xSt.get_Range(excel.Cells[rowSum,colSum],excel.Cells[rowSum,colIndex]).Interior.ColorIndex = 19;//设置为浅黄色,共计有56种
//
//取得整个报表的标题
//
excel.Cells[2,2] = str;
//
//设置整个报表的标题格式
//
xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Bold = true;
xSt.get_Range(excel.Cells[2,2],excel.Cells[2,2]).Font.Size = 22;
//
//设置报表表格为最适应宽度
//
xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Select();
xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Columns.AutoFit();
//
//设置整个报表的标题为跨列居中
//
xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).Select();
xSt.get_Range(excel.Cells[2,2],excel.Cells[2,colIndex]).HorizontalAlignment = XlHAlign.xlHAlignCenterAcrossSelection;
//
//绘制边框
//
xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,colIndex]).Borders.LineStyle = 1;
xSt.get_Range(excel.Cells[4,2],excel.Cells[rowSum,2]).Borders[XlBordersIndex.xlEdgeLeft].Weight = XlBorderWeight.xlThick;//设置左边线加粗
xSt.get_Range(excel.Cells[4,2],excel.Cells[4,colIndex]).Borders[XlBordersIndex.xlEdgeTop].Weight = XlBorderWeight.xlThick;//设置上边线加粗
xSt.get_Range(excel.Cells[4,colIndex],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeRight].Weight = XlBorderWeight.xlThick;//设置右边线加粗
xSt.get_Range(excel.Cells[rowSum,2],excel.Cells[rowSum,colIndex]).Borders[XlBordersIndex.xlEdgeBottom].Weight = XlBorderWeight.xlThick;//设置下边线加粗
//
//显示效果
//
excel.Visible=true; //xSt.Export(Server.MapPath(".")+"\\"+this.xlfile.Text+".xls",SheetExportActionEnum.ssExportActionNone,Microsoft.Office.Interop.OWC.SheetExportFormat.ssExportHTML);
xBk.SaveCopyAs(Server.MapPath(".")+"\\"+this.xlfile.Text+".xls"); ds = null;
xBk.Close(false, null,null);
excel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(xBk);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
System.Runtime.InteropServices.Marshal.ReleaseComObject(xSt);
xBk = null;
excel = null;
xSt = null;
GC.Collect();
string path = Server.MapPath(this.xlfile.Text+".xls"); System.IO.FileInfo file = new System.IO.FileInfo(path);
Response.Clear();
Response.Charset="GB2312";
Response.ContentEncoding=System.Text.Encoding.UTF8;
// 添加头信息,为"文件下载/另存为"对话框指定默认文件名
Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
// 添加头信息,指定文件大小,让浏览器能够显示下载进度
Response.AddHeader("Content-Length", file.Length.ToString());
// 指定返回的是一个不能被客户端读取的流,必须被下载
Response.ContentType = "application/ms-excel";
// 把文件流发送到客户端
Response.WriteFile(file.FullName);
// 停止页面的执行
Response.End();
}