C# .NET关于GridView和ASPxGridView导出Excel表格的解决方法

GridView导出Excel

1.前端页面代码：

<asp:Button ID="Button4" runat="server" Text="导出Excel" OnClick="ExcelClick" Height="22px" Width="82px" />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="White"  BackColor="#111111"
             DataKeyNames="ID" CssClass="auto-style2" OnRowDataBound="GridView1_RowDataBound" AllowPaging="True" OnRowCreated="GridView1_RowCreated" OnPageIndexChanging="GridView1_PageIndexChanging"   PageSize="10000"   GridLines="Both" Font-Italic="False">
        <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="#222222" />
        <Columns>

        <asp:BoundField DataField="soDate" HeaderText="销售单日期"  ControlStyle-Width="120px" DataFormatString="{0:yyyy/MM/dd}" HtmlEncode="False" ReadOnly="True"><ControlStyle Width="120px"></ControlStyle></asp:BoundField>   
<%--省略-->
            
        </Columns>
        <RowStyle ForeColor="#FFFFFF" BackColor="#222222" /> 
        <SelectedRowStyle BackColor="#AA0000" Font-Bold="True" ForeColor="#FFFF00" />
        <PagerStyle BackColor="#222222" ForeColor="#FFFFFF" />
        <HeaderStyle BackColor="#111111" Font-Bold="True" ForeColor="#FFFFFF" HorizontalAlign="Center" />
        </asp:GridView>

说明：ForeColor为前景色（这里为字体的颜色），BackColor为背景色。第一行是导出Excel的按钮，OnClick="ExcelClick"调用了下面的导出方法

2.后端代码

 //导出GridView Excel
        protected void ExcelClick(object sender, EventArgs e)
        {
    
    

            string attachment = "attachment;  filename=MyExcel" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".xls";
            Response.ClearContent();
            Response.Buffer = true;
            Response.AddHeader("content-disposition", attachment);
            Response.Charset = "UTF-8";
            Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
            Response.ContentType = "application/ms-excel";
            System.IO.StringWriter sw = new System.IO.StringWriter();
            HtmlTextWriter htw = new HtmlTextWriter(sw);
            GridView1.RenderControl(htw);
            Response.Output.Write(sw.ToString());
            Response.Flush();
            Response.End();

        }

        public override void VerifyRenderingInServerForm(Control control)
        {
    
    
			//如果不加这个重载方法导出会报错
        }

代码说明：该导出方法就是直接把html的格式一起导出了。

3.效果
浏览器的样式：

导出后用Excel打开：

ASPxGridView导出Excel

1.前端代码

<asp:Button ID="Button4" runat="server" Text="导出Excel" OnClick="ExcelClick1" Height="22px" Width="82px" />
<dx:ASPxGridViewExporter ID="ASPxGridViewExporter1" runat="server" GridViewID="ASPxGridView1" ></dx:ASPxGridViewExporter>
 <dx:ASPxGridView ID="ASPxGridView1" ForeColor="White" runat="server" KeyFieldName="id" AutoGenerateColumns="False" >
        <Columns>
            <dx:GridViewBandColumn Caption="销售单日期" VisibleIndex="2"><Columns><dx:GridViewDataTextColumn Caption="SO issue date" FieldName="soDate" VisibleIndex="0"></dx:GridViewDataTextColumn></Columns></dx:GridViewBandColumn>
            <%--省略-->
        </Columns>
        <SettingsPager PageSize="2000">
        </SettingsPager>
       <SettingsText EmptyDataRow=" " />
            <Styles>
                <Table BackColor="#222222"></Table>
                <Header BackColor="#222222" ForeColor="White"></Header>
                <Row ForeColor="White"></Row>
                <PagerBottomPanel BackColor="#222222"></PagerBottomPanel>
            </Styles>
            <StylesPager>
                <PageNumber BackColor="#222222" ForeColor="White"></PageNumber><Pager ForeColor="White"></Pager>
            </StylesPager>
    </dx:ASPxGridView>

说明：先对dx:ASPxGridView绑定数据，设置样式，设置表头等元素，然后dx:ASPxGridViewExporter是导出Excel的方法。

2.后台代码

//导出ASPxGridView Excel
        protected void ExcelClick1(object sender, EventArgs e)
        {
    
    
            ASPxGridView1.DataSource = Session["conindevelopment"];
            ASPxGridView1.DataBind();
           
            ASPxGridViewExporter1.WriteXlsToResponse("MyExcel" + System.DateTime.Now.ToString("yyyyMMddHHmmss"));
        }

说明：Session["conindevelopment"]是在系统连接数据库查找数据时，把连接数据库的属性和数据一并放入Session中，以此减少系统的性能开销，在导出excel文件往往是一键导出，无需等待。

Session设置代码如下：

private void BindData()
        {
    
    

            SqlConnection sqlConna = new SqlConnection(strConnn);
            string strSql = "select * from xxx";
            SqlDataAdapter sqlDa = new SqlDataAdapter(strSql, sqlConna);
            DataSet dt = new DataSet();
            sqlDa.Fill(dt, "xxx");
            this.ASPxGridView1.DataSource = dt;
            this.ASPxGridView1.DataBind();
            Session["conindevelopment"] = dt;  //设置Session
            panelGone.Visible = false;
            sqlConna.Close();
            sqlConna.Dispose();
        }

3.效果

结语：这两种导出方法，我更倾向于第二种，第二种导出来的是真正的Excel表格，而第一种导出的是html网页表格，Excel可以打开，但是存在兼容性问题。当然了，导出Excel的方法有很多种，我只是简单的介绍一下这两种，其他的日后有机会再研究一下。