GridView中的数据导出到Excel方法(经测试完整) （带模版列）

 

GridView中的数据导出到Excel方法(经测试完整) 

protected void Button2_Click(object sender, EventArgs e)
    ...{
        if (this.GridView1.Rows.Count == 0)
        ...{
            Response.Write("<script>alert('没有查找到数据,无法导出！')");
        }
        else
        ...{
            this.GridView1.AllowPaging = false; // 将有分页的GridView中的数据全部导出到Excel
            gvBond();
            export("application/ms-excel", "工作人员.xls");
            // 换成 export("application/ms-word", "工作人员.doc"); 那么导出的就是Word格式的了.
            this.GridView1.AllowPaging = true;
            gvBond();
        }
    }
     public void export(string FileType, string FileName)
    ...{
        string style = @"<style>.text{mso-number-format:@}</script>";//导入到excel时,保存表里数字列中前面存在的 0 .

           PrepareGridViewForExport(Control gv)//将模版列显示出来
        Response.Clear();
        Response.Charset = "GB2312";
        Response.ContentEncoding = Encoding.UTF7;
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());
        Response.ContentType = FileType;
        this.EnableViewState = false;
        this.GridView1.AllowPaging = false;
        System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
        StringWriter sw = new StringWriter();
        HtmlTextWriter htw = new HtmlTextWriter(sw);
        this.GridView1.RenderControl(htw);
        Response.Write(style);
        Response.Write(sw.ToString());
        //Response.Write(dt.ToString());
        Response.End();
    }

    public override void VerifyRenderingInServerForm(Control control)
    ...{
        //在后台中重载VerifyRenderingInServerForm()方法，否则报错为“类型"GridView"的控件"GridView1"必须放在具有 runat=server 的窗体标记内“
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    ...{
        if (e.Row.RowType == DataControlRowType.DataRow)
        ...{
            e.Row.Cells[3].Attributes.Add("class", "text");//在数字列前存在的 0 的列中加入 class 样式 以便保存 0 
        }
    }

注:如果GricView中有分页的话,导出到Excel时就会报错.可通过修改页文件可以修正这个问题：EnableEventValidation = "false". 

<%@ Page Language="C#" EnableEventValidation="false" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

如果GridView存在模板列，其中包含子控件，例如CheckBox等，导出EXCEL后就会出现该区域的不规律。所以要对模板列单独处理（转载）
 private  void PrepareGridViewForExport(Control gv)//模式化特殊元素 flashcong
    ...{

        LinkButton lb = new LinkButton();
        Literal l = new Literal();
        string name = String.Empty;

        for (int i = 0; i < gv.Controls.Count; i++)
        ...{

            if (gv.Controls[i].GetType() == typeof(LinkButton))
            ...{

                l.Text = (gv.Controls[i] as LinkButton).Text;
                gv.Controls.Remove(gv.Controls[i]);
                gv.Controls.AddAt(i, l);

            }

            else if (gv.Controls[i].GetType() == typeof(DropDownList))
            ...{

                l.Text = (gv.Controls[i] as DropDownList).SelectedItem.Text;
                gv.Controls.Remove(gv.Controls[i]);
                gv.Controls.AddAt(i, l);

            }

            else if (gv.Controls[i].GetType() == typeof(CheckBox))
            ...{

               l.Text = (gv.Controls[i] as CheckBox).Checked ? "True" : "False";
               gv.Controls.Remove(gv.Controls[i]);
               gv.Controls.AddAt(i, l);

            }

            else if (gv.Controls[i].GetType() == typeof(ImageButton))
            ...{
              l.Text = "图片";
              gv.Controls.Remove(gv.Controls[i]);
              gv.Controls.AddAt(i, l);
            }

            if (gv.Controls[i].HasControls())
            ...{
                PrepareGridViewForExport(gv.Controls[i]);
            }

        }

    }对以上特殊元素，可以替换成目标代码输出即可