。net 自动导出excel

#region 自动保存excel 

/// <summary> 

/// winform生成Excle文件并保存到指定位置 

/// </summary> 

/// <param name="dt">数据源</param> 

/// <param name="saveFileName">生成Excel文件名</param> 

public void ExportToExcel(DataTable dt, string saveFileName) 

{ 

if (dt == null) return; 

Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); 

if (xlApp == null) 

{ 

// lblMsg.Text = "无法创建Excel对象，可能您的机子未安装Excel"; 

MessageBox.Show("请确保您的电脑已经安装Excel", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Error); 

return; 

} 

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[1]; //取得sheet1 

Microsoft.Office.Interop.Excel.Range range = null; 

long totalCount = dt.Rows.Count; 

long rowRead = 0; 

float percent = 0; 





//写入标题 

for (int i = 0; i < dt.Columns.Count; i++) 

{ 

worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName; 

range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]; 

//range.Interior.ColorIndex = 15;//背景颜色 

range.Font.Bold = true; //粗体 

range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //居中 

//加边框 

//range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, 

// Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); 

//range.ColumnWidth = 4.63;//设置列宽 

//range.EntireColumn.AutoFit();//自动调整列宽 

//r1.EntireRow.AutoFit();//自动调整行高 

} 

//写入内容 

for (int r = 0; r < dt.Rows.Count; r++) 

{ 

for (int i = 0; i < dt.Columns.Count; i++) 

{ 

try 

{ 

worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i]; 





range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + 2, i + 1]; 

range.Font.Size = 9; //字体大小 

//加边框 

//range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, 

// Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); 

range.EntireColumn.AutoFit(); //自动调整列宽 

} 

catch (Exception) 

{ 

} 

} 

rowRead++; 

percent = ((float)(100 * rowRead)) / totalCount; 

Application.DoEvents(); 

} 





range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; 

if (dt.Columns.Count > 1) 

{ 

range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; 

} 





try 

{ 

workbook.Saved = true; 

//workbook.Saved = true; 

workbook.SaveCopyAs(saveFileName); 

} 

catch (Exception ex) 

{ 

MessageBox.Show("导出文件时出错,文件可能正被打开!", "系统信息"); 

} 

workbooks.Close(); 

if (xlApp != null) 

{ 

xlApp.Workbooks.Close(); 

xlApp.Quit(); 

int generation = GC.GetGeneration(xlApp); 

System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp); 

xlApp = null; 

GC.Collect(generation); 

} 

GC.Collect(); //强行销毁 





#region 强行杀死最近打开的Excel进程 





System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL"); 

DateTime startTime = new DateTime(); 

int m, killId = 0; 

for (m = 0; m < excelProc.Length; m++) 

{ 

if (startTime < excelProc[m].StartTime) 

{ 

startTime = excelProc[m].StartTime; 

killId = m; 

} 

} 

if (excelProc[killId].HasExited == false) 

{ 

excelProc[killId].Kill(); 

} 





#endregion 

} 

#endregion