将SqlServer的数据导出到Excel中的各种方法

以下都只是介绍操作的原理，具体要求要在应用中具体分析改变。

1. 此方法常用在form或者Console Application中，使用时须用要添加Reference，具体做法：

右键点击项目添加“Add Reference”，在Tom组件下，选择“Microsoft
Excel 14.0 Object Library”，然后在项目中使用

下面注释//it looks like excele table start with 1 not 1

应该为//it looks like excele table start with 1 not 0

private static void exportToExcel(DataTable dt)
        {
            Excel.Application excel=new Excel.Application();
            excel.Application.Workbooks.Add(true);
            excel.Visible = true;

            //get the columns
            for (int i = 0; i < dt.Columns.Count;i++ )
            {
                //here is started with 1
                //it looks like excele table start with 1 not 1
                excel.Cells[1, i + 1] = dt.Columns[i].ColumnName.ToString(); 
            }

            //get the data in rows
            for (int row = 0; row < dt.Rows.Count;row++ )
            {
                for (int col = 0; col < dt.Columns.Count; col++)
                {
                    excel.Cells[row+2, col+1] = dt.Rows[row][dt.Columns[col]].ToString();
                }
            }
            //FolderBrowserDialog path = new FolderBrowserDialog();//打开文件对话框
            //path.ShowDialog();
            //textBox1.Text = path.SelectedPath;//选择文件夹

            //save excel
            //excel.SaveWorkspace();

            excel.Quit();
        }

2. 在web应用中，可通过HttpContext.Response.write()来实现

protected static void  toExcel(DataTable da){
        System.Web.HttpContext context = System.Web.HttpContext.Current;
        context.Response.Clear();

        foreach( DataColumn colum in da.Columns){
            context.Response.Write(colum.ColumnName+"\t");
        }

        context.Response.Write(System.Environment.NewLine);

        foreach (DataRow row in da.Rows) {
            for (int i = 0; i < da.Rows.Count; i++)
            {
                context.Response.Write(row[i].ToString()+"\t");
            }
            context.Response.Write(System.Environment.NewLine);
        }
        context.Response.ContentType = "application/vnd.ms-excel";
        context.Response.AppendHeader("Content-Disposition", "attachment; filename=plan.xls");
        context.Response.End();
    }