asp.net 导出GridView里的数据到Excel中

asp.net 导出GridView里的数据到Excel中，全部，当前页，选择行，选中行，所选行，复
关键字: asp.net 导出 gridview 数据 excel 全部 当前页 选择行 选中行 所选行 复选框 
按下保存按钮，可以选择保存当前行，当前页和全部记录 

C#代码 
#region 保存   
  
/// <summary>   
/// 保存   
/// </summary>   
protected void btnBC_Click(object sender, EventArgs e)   
{   
    string save_cblJL = "";   
    for (int i = 0; i < this.cblJL.Items.Count; i++)   
    {   
        if (this.cblJL.Items[i].Selected == true)   
        {   
            save_cblJL += this.cblJL.Items[i].Value + ",";   
        }   
    }   
  
    string[] save_Excel = save_cblJL.Split(',');   
  
    for (int j = 0; j < save_Excel.Length - 1;j++ )   
    {   
        if (save_Excel[j].Equals("全部记录"))   
        {   
            toExcelClk(gvwjdccx, 3);   
        }   
        else if (save_Excel[j].Equals("当前页"))   

        {   
            toExcelClk(gvwjdccx, 2);   
        }   
        else if (save_Excel[j].Equals("当前记录"))   
        {   
            toExcelClk(gvwjdccx, 1);   
        }   
    }   
}  
#endregion 保存  

#region 保存

/// <summary>
/// 保存
/// </summary>
protected void btnBC_Click(object sender, EventArgs e)
{
string save_cblJL = "";
for (int i = 0; i < this.cblJL.Items.Count; i++)
{
if (this.cblJL.Items[i].Selected == true)
{
save_cblJL += this.cblJL.Items[i].Value + ",";
}
}

string[] save_Excel = save_cblJL.Split(',');

for (int j = 0; j < save_Excel.Length - 1;j++ )