winform中 将DataGrid中的数据导入Excel中,并显示Excel应用程序

/// <summary>
/// 将DataGrid中的数据导入Excel中,并显示Excel应用程序，
/// 注意调用该方法必须有安装Excel 2000应用程序,并且假定DataGrid中绑定的是一DataSet
/// </summary>
/// <param name="grid"></param>
/// <param name="ReportTitle"></param>
public static void ExportDataGridToExcel(DataGrid grid,string ReportTitle)
{
DataTable myTable = ((DataSet)grid.DataSource).Tables[0];

try
{
Excel.Application xlApp = new Excel.ApplicationClass();

int rowIndex;
int colIndex;

rowIndex = 2;
colIndex = 0;

Excel.Workbook xlBook =xlApp.Workbooks.Add(true);

if (grid.TableStyles.Count >0 )
{
Excel.Range range = xlApp.get_Range(xlApp.Cells[1,1],xlApp.Cells[1,grid.TableStyles[0].GridColumnStyles.Count]);
range.MergeCells = true;
xlApp.ActiveCell.FormulaR1C1 = ReportTitle;
xlApp.ActiveCell.Font.Size = 18;
xlApp.ActiveCell.Font.Bold = true;

foreach(DataGridColumnStyle colu in grid.TableStyles[0].GridColumnStyles)
{
colIndex=colIndex +1;
xlApp.Cells[2,colIndex] = colu.HeaderText ;
}

//得到的表所有行,赋值给单元格
for (int row = 0;row < myTable.Rows.Count;row++)
{
rowIndex = rowIndex + 1;
colIndex = 0;
for (int col=0;col<grid.TableStyles[0].GridColumnStyles.Count;col++)
{
colIndex = colIndex + 1;
xlApp.Cells[rowIndex, colIndex] = grid[row,col].ToString();
}
}
}
else
{
Excel.Range range = xlApp.get_Range(xlApp.Cells[1,1],xlApp.Cells[1,myTable.Columns.Count]);
range.MergeCells = true;
xlApp.ActiveCell.FormulaR1C1 = ReportTitle;
xlApp.ActiveCell.Font.Size = 18;
xlApp.ActiveCell.Font.Bold = true;

//将表中的栏位名称填到Excel的第一行
foreach(DataColumn Col in myTable.Columns)
{
colIndex = colIndex + 1;
xlApp.Cells[2, colIndex] = Col.ColumnName;
}

//得到的表所有行,赋值给单元格
for (int row = 0;row < myTable.Rows.Count;row++)
{
rowIndex = rowIndex + 1;
colIndex = 0;
for (int col=0;col<myTable.Columns.Count;col++)
{
colIndex = colIndex + 1;
xlApp.Cells[rowIndex, colIndex] = grid[row,col].ToString();
}
}
}

xlApp.get_Range(xlApp.Cells[2, 1], xlApp.Cells[2, colIndex]).Font.Bold = true;
xlApp.get_Range(xlApp.Cells[2, 1], xlApp.Cells[rowIndex, colIndex]).Borders.LineStyle = 1;

xlApp.Cells.EntireColumn.AutoFit();
xlApp.Cells.VerticalAlignment = Excel.Constants.xlCenter ;
xlApp.Cells.HorizontalAlignment = Excel.Constants.xlCenter ;

xlApp.Visible = true;
}
catch(Exception e)
{
throw e;
}


}