大家好,又见面了,我是你们的朋友全栈君。
事实上网上有非常多关于Excel的样例,可是不是非常好,他们的代码没有非常全,读的起来还非常晦涩。经过这几天的摸索,最终能够完毕我想要导出报表Excel的效果了。以下是我的效果图。
一.前台的页面图
GridView的第一页的内容
GridView第二页的内容:
大家可能遇到这样的情况,就是这个时候导出Excel的时候,打开Excel的时候发现GridView的第二页的内容却没有导出到Excel表里面。事实上解决这样的情况,非常easy,仅仅要在导出之前,把Gridview的设置分页设置为Flase即可了。
以下是我导出Gridview里面的所有内容,打开Excel表例如以下:
这就能够导出所有的GridView里面的内容了,包含了GridView的第一页和第二页的内容。
二、实现的代码
1.前台的代码:
<div style=” margin:20px;”> <asp:GridView ID=”gvRecord” runat=”server” AllowPaging=”True” CellPadding=”3″ AutoGenerateColumns=”False” BorderColor=”White” BorderStyle=”Ridge” BorderWidth=”2px” BackColor=”White” CellSpacing=”1″ GridLines=”None” onprerender=”gvRecord_PreRender” onpageindexchanged=”gvRecord_PageIndexChanged” onpageindexchanging=”gvRecord_PageIndexChanging” > <PagerSettings FirstPageText=”Home Page” LastPageText=”Last Page” NextPageText=”Next” PreviousPageText=”Previous” /> <RowStyle ForeColor=”Black” BackColor=”#E5F1FF” HorizontalAlign=”Center” /> <Columns> <asp:TemplateField HeaderText=”Extension”> <ItemTemplate> <asp:Label ID=”Label1″ runat=”server” Text='<%# Bind(“Extn”) %>’></asp:Label> </ItemTemplate> <ItemStyle Width=”200px” /> </asp:TemplateField> <asp:TemplateField HeaderText=”Wake up time”> <ItemTemplate> <asp:Label ID=”Label2″ runat=”server” Text='<%# Bind(“CallTime”) %>’></asp:Label> </ItemTemplate> <ItemStyle Width=”300px” /> </asp:TemplateField> <asp:TemplateField HeaderText=”Status”> <ItemTemplate> <asp:Label ID=”Label3″ runat=”server” Text='<%# getResult(Eval(“Status”).ToString()) %>’></asp:Label> </ItemTemplate> <ItemStyle Width=”250px” /> </asp:TemplateField> <asp:TemplateField HeaderText=”Call number”> <ItemTemplate> <asp:Label ID=”Label4″ runat=”server” Text='<%# Bind(“callcount”) %>’></asp:Label> </ItemTemplate> <ItemStyle Width=”150px” /> </asp:TemplateField> </Columns> <FooterStyle BackColor=”#C6C3C6″ ForeColor=”Black” /> <PagerStyle BackColor=”#C6C3C6″ ForeColor=”Black” HorizontalAlign=”Right” /> <SelectedRowStyle BackColor=”#9471DE” Font-Bold=”True” ForeColor=”White” /> <HeaderStyle BackColor=”#C9E2FF” Font-Bold=”True” ForeColor=”#000000″ /> </asp:GridView> <p> <asp:Button ID=”btnExcel” CssClass=”button” runat=”server” Text=”Statements ” onclick=”btnExcel_Click” /></p> </div>
2.后台代码例如以下:
using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using Model; using DAL; using System.Collections.Generic; using System.IO;
public partial class _3C_CallManager_CallRecord : System.Web.UI.Page { int selectFlag = 0; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { bind(); } }
public string getResult(string str) { if (str == “0”) return “Haven’t called”; if (str == “1”) return “check-out”; if (str == “2”) return “success”; if (str == “3”) return “fail”; if (str == “4”) return “dealing”; if (str == “5”) return “Artificial wake”; else return “unkown”;
} public void bind() { selectFlag = 0; gvRecord.DataSource = VgCallService.GetInfo(); gvRecord.DataBind(); } protected void btnExcel_Click(object sender, EventArgs e) { DateTime dt = System.DateTime.Now; string str = dt.ToString(“yyyyMMddhhmmss”); str = str “.xls”;
gvRecord.AllowPaging = false; if (selectFlag == 0) bind(); if (selectFlag == 1) selectBind();
GridViewToExcel(gvRecord, “application/ms-excel”, str);
// Export(gvRecord, “application/ms-excel”, str);
}
/// <summary> /// 将网格数据导出到Excel /// </summary> /// <param name=”ctrl”>网格名称(如GridView1)</param> /// <param name=”FileType”>要导出的文件类型(Excel:application/ms-excel)</param> /// <param name=”FileName”>要保存的文件名称</param> public static void GridViewToExcel(Control ctrl, string FileType, string FileName) { HttpContext.Current.Response.Charset = “GB2312”; HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;//注意编码 HttpContext.Current.Response.AppendHeader(“Content-Disposition”, “attachment;filename=” HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8).ToString()); HttpContext.Current.Response.ContentType = FileType;//image/JPEG;text/HTML;image/GIF;vnd.ms-excel/msword ctrl.Page.EnableViewState = false; StringWriter tw = new StringWriter(); HtmlTextWriter hw = new HtmlTextWriter(tw); ctrl.RenderControl(hw); HttpContext.Current.Response.Write(tw.ToString()); HttpContext.Current.Response.End(); } /// <summary> /// ReLoad this VerifyRenderingInServerForm is neccessary /// </summary> /// <param name=”control”></param>
public override void VerifyRenderingInServerForm(Control control) {
}
protected void gvRecord_PreRender(object sender, EventArgs e) { if(selectFlag==0) bind(); } protected void gvRecord_PageIndexChanged(object sender, EventArgs e) {
} protected void gvRecord_PageIndexChanging(object sender, GridViewPageEventArgs e) { this.gvRecord.PageIndex = e.NewPageIndex;
bind(); } }
注意问题说明:
1)前台页面<%@ Page Language=”C#” EnableEventValidation=”false” AutoEventWireup=”true” CodeFile=”CallRecord.aspx.cs” Inherits=”_3C_CallManager_CallRecord” %>注意加入EnableEventValidation=”false”,要不然会报错的。
2)GridView的绑定数据库的代码
gvRecord.DataSource = VgCallService.GetInfo();//VgCallService.GetInfo()是获取数据库的集合,我是封装好的,依据你们的获取的集合做不同的调整。 gvRecord.DataBind(); 3)点击GridView下一页的关键代码,在PageIndexChanging事件里面
this.gvRecord.PageIndex = e.NewPageIndex; //注意这个不能少。
bind();
4)在导出Excel的button事件里面记得先gvRecord.AllowPaging = false;把GridView的分页取消之后,再调用GridViewToExcel方法。
5)以下的不可少。
public override void VerifyRenderingInServerForm(Control control) {
}
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