Sql数据保存到Excel文件中

public string ExportExcel( DataSet ds,string saveFileName)
{
try
{
if (ds == null)
return "数据库为空"; bool fileSaved = false; Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null)
{
return "无法创建Excel对象，可能您的机子未安装Excel";
} Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[];//取得sheet1
//写入字段
for (int i = ; i < ds.Tables[].Columns.Count; i++)
{
worksheet.Cells[, i + ] = ds.Tables[].Columns[i].ColumnName;
}
//写入数值 for (int r = ; r < ds.Tables[].Rows.Count; r++)
{
for (int i = ; i < ds.Tables[].Columns.Count; i++)
{
worksheet.Cells[r + , i + ] = ds.Tables[].Rows[r][i];
}
System.Windows.Forms.Application.DoEvents();
}
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。
if (saveFileName != "")
{
try
{
workbook.Saved = true;
workbook.SaveCopyAs(saveFileName);
fileSaved = true;
}
catch (Exception ex)
{
fileSaved = false;
MessageBox.Show("导出文件时出错,文件可能正被打开！\n" + ex.Message);
}
}
else
{
fileSaved = false;
}
xlApp.Quit();
GC.Collect();//强行销毁
if (fileSaved && System.IO.File.Exists(saveFileName)) System.Diagnostics.Process.Start(saveFileName); //打开EXCEL
return "成功保存到Excel";
}
catch (Exception ex)
{
return ex.ToString();
}
}