C# 导出Excel方法

private void outPutExcel(System.Data.DataTable dt, System.Data.DataTable dt2)
{
if (dt == null) return;
Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application();
if (xlApp == null)
{
//clsLog.m_CreateErrorLog("无法创建Excel对象，可能计算机未安装Excel", "", "");
return;
}
//創建Excel對象
Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks;
Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet);
//Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];//取得sheet1
Microsoft.Office.Interop.Excel.Worksheet worksheet = null;
for (int sheetcount = 0; sheetcount < 2; sheetcount++)//循环根据自己需要的sheet的数目这里是两个
{
if (worksheet == null)
{
worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(Type.Missing, Type.Missing, 1, Type.Missing);
}
else
{
worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.Add(Type.Missing, worksheet, 1, Type.Missing);
}
Microsoft.Office.Interop.Excel.Range range = null;
if (sheetcount == 0)
{
long totalCount = dt.Rows.Count;
long rowRead = 0;
float percent = 0;
worksheet.Name = "明細資料一";//第一个sheet在Excel中显示的名称
////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++)
{
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
}
rowRead++;
percent = ((float)(100 * rowRead)) / totalCount;
this.lblCaption.Text = "正在导出数据[" + percent.ToString("0.00") + "%]...";
progressBar1.Value = Convert.ToInt32(percent);
System.Windows.Forms.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;
}
}
else if (sheetcount == 1)
{
long totalCount = dt2.Rows.Count;
long rowRead = 0;
float percent = 0;
worksheet.Name = "建議解決方案";
////写入标题
for (int i = 0; i < dt2.Columns.Count; i++)
{
worksheet.Cells[1, i + 1] = dt2.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 = 14.63;//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 < dt2.Rows.Count; r++)
{
for (int i = 0; i < dt2.Columns.Count; i++)
{
worksheet.Cells[r + 2, i + 1] = dt2.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
}
rowRead++;
percent = ((float)(100 * rowRead)) / totalCount;
//System.Windows.Forms.Application.DoEvents();
this.lblCaption.Text = "正在导出数据[" + percent.ToString("0.00") + "%]...";
progressBar1.Value = Convert.ToInt32(percent);
System.Windows.Forms.Application.DoEvents();
}
range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
if (dt2.Columns.Count > 1)
{
range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin;
}
string path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, System.DateTime.Today.ToString("yyyyMMdd"));
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
workbook.SaveAs(path+"aaa.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

}
}
}