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通过反射搞定GridViewCollection 的添加新的GridViewRow问题

Posted on 2006-10-09 00:03  liufu627  阅读(665)  评论(1)    收藏  举报
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:GridView ID="gvMain" runat="server" AutoGenerateColumns="false"  >
    <Columns>
     <asp:TemplateField>
      <ItemTemplate>
        <asp:Label ID="lblCode"  runat="server"  Text='<%# Eval("Code") %>' ></asp:Label>
      </ItemTemplate>
      <EditItemTemplate>
        <asp:DropDownList ID="ddlCode"  runat="server" DataValueField="Code" DataTextField="Code"></asp:DropDownList>
        <asp:HiddenField ID="hfCode" Value='<%# Eval("Code") %>'  runat="server" />
         </EditItemTemplate>
      <HeaderTemplate>Code</HeaderTemplate>
     </asp:TemplateField>
     <asp:TemplateField>
        <ItemTemplate>
         <asp:Button ID="btnEdit" Text="Edit" runat="server" />
         &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<asp:Button ID="btnDelete" Text="Delete" runat="server" />
        </ItemTemplate>
        <EditItemTemplate>
          <asp:Button ID="btnUpdate" Text="Update" CommandName="Update" runat="server" />
          <asp:Button ID="btnCancel" Text="Cancel" CommandName="Cancel" runat="server" />
        </EditItemTemplate>
        <HeaderTemplate>Action</HeaderTemplate>
     </asp:TemplateField>
    </Columns>
    </asp:GridView>
    </div>
    </form>
</body>
</html>
以下后台代码
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections.Generic;
using System.Reflection;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
        if( Page.IsPostBack == false )
        {
            this.gvMain.DataSource = GetData( );
            this.gvMain.DataBind( );
        }      
        AddMarket( );
    }

    private void AddMarket(  )
    {
        GridViewRow row = new GridViewRow( this.gvMain.Rows.Count , this.gvMain.Rows.Count , DataControlRowType.Separator , DataControlRowState.Normal );
        foreach( DataControlField dataColumn in gvMain.Columns )
        {

            DataControlFieldCell cell = new DataControlFieldCell( dataColumn );

            dataColumn.InitializeCell( cell , DataControlCellType.DataCell , DataControlRowState.Normal , this.gvMain.Rows.Count );

            Label lblCode = null;
            foreach( Control control in cell.Controls )
            {
                if( control == null || control.UniqueID == null )
                    continue;
                if( control.UniqueID.Trim( ).ToUpper( ) == "lblCode".Trim( ).ToUpper( ) )
                {
                    lblCode = ( Label ) control;
                }
            }


            if( lblCode != null )
            {
                lblCode.Text = "Liufu";
            }
            row.Cells.Add( cell );
            //row.Parent =  this.gvMain.Rows [0].Parent;
            this.gvMain.Rows [0].Parent.Controls.Add( row );
        }
        Table tb = ( Table ) gvMain.Controls [0];
        tb.Rows.AddAt( gvMain.Rows.Count + 1 , row );
        this.gvMain.FooterRow.Parent.Controls.AddAt( 0 , row );
        this.SaveControlState( );
        this.SaveViewState( );
        GridViewRow [] rows = new GridViewRow [gvMain.Rows.Count + 1 ];
        rows [rows.Length - 1] = row;
        this.gvMain.Rows.CopyTo( rows , 0 );
        System.Collections.ArrayList list = new System.Collections.ArrayList( );
        foreach( GridViewRow tmp in rows )
        {
            list.Add( tmp );
        }
        //    this._rowsCollection = new GridViewRowCollection(this._rowsArray);

        Type typeGridView = gvMain.GetType( );

        FieldInfo [] ms = typeGridView.GetFields( BindingFlags.DeclaredOnly | BindingFlags.NonPublic 
            |                       BindingFlags.Instance | BindingFlags.CreateInstance
              );

        foreach( FieldInfo m in ms )
        {
            if( m.Name.Trim( ).ToUpper( ) == "_rowsCollection".Trim( ).ToUpper( ) )
            {
                m.SetValue( gvMain , new GridViewRowCollection( list ) );

            }

        }

    }
   

    protected object GetData( )
    {
        List<TestSource> lists = new List<TestSource>( );
        int length = 10;
        for( int i = 0 ; i < length ; i++ )
        {
            TestSource t = new TestSource( );
            t.Code = string.Format( "Code{0}{0}{0}{0}" , i );
            lists.Add( t );
        }
        return lists;
    }
    public class TestSource
    {
        private string code;

        public string Code
        {
            get
            {
                return code;
            }
            set
            {
                code = value;
            }
        }

    }
}

public class Test
{
    public string test = "test";

    void Foo( )
    {
        test = "Foo";
    }

}