asp.net 自定义控件数据绑定的问题

最近写了一个自定义控件，功能是根据设置了的type属性，来显示相应的内容，控件代码如下：
WebUserControl.ascx
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<asp:RadioButtonList ID="RadioButtonList1" runat="server" RepeatColumns="5">
    <asp:ListItem Selected="True">1</asp:ListItem>
    <asp:ListItem>2</asp:ListItem>
    <asp:ListItem>3</asp:ListItem>
    <asp:ListItem>4</asp:ListItem>
    <asp:ListItem>5</asp:ListItem>
</asp:RadioButtonList>
<asp:DropDownList ID="DropDownList1" runat="server">
    <asp:ListItem Selected="True">1</asp:ListItem>
    <asp:ListItem>2</asp:ListItem>
    <asp:ListItem>3</asp:ListItem>
    <asp:ListItem>4</asp:ListItem>
</asp:DropDownList>
<asp:CheckBoxList ID="CheckBoxList1" runat="server" RepeatColumns="5">
    <asp:ListItem>1</asp:ListItem>
    <asp:ListItem>2</asp:ListItem>
    <asp:ListItem>3</asp:ListItem>
    <asp:ListItem>4</asp:ListItem>
    <asp:ListItem>5</asp:ListItem>
</asp:CheckBoxList>
WebUserControl.ascx.csusing System;
using System.Data;
using System.Configuration;
using System.Collections;
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;
[Serializable()]
public partial class WebUserControl : System.Web.UI.UserControl
{
    private int _Type = 0;    public int Type
    {
        get { return _Type; }
        set { 
            
            _Type = value;
            SetVisible();
        }
    }    protected void Page_Load(object sender, EventArgs e)
    {
        SetVisible();
    }    void SetVisible()
    {
        switch (_Type)
        {
            case 0:
                RadioButtonList1.Visible = true;
                DropDownList1.Visible = false;
                CheckBoxList1.Visible = false;
                break;
            case 1:
                RadioButtonList1.Visible = false;
                DropDownList1.Visible = true;
                CheckBoxList1.Visible = false;
                break;            case 2:
                RadioButtonList1.Visible = false;
                DropDownList1.Visible = false;
                CheckBoxList1.Visible = true;
                break;
        }
    
    }
}使用这个页面的测试页面：
Default2.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %><%@ Register Src="WebUserControl.ascx" TagName="WebUserControl" TagPrefix="uc1" %><!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="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID">
            <Columns>
                <asp:TemplateField HeaderText="Name">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Type">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Type") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <uc1:WebUserControl id="WebUserControl1" Type='<%# Convert.ToInt32(Eval("Type")) %>' runat="server">
                        </uc1:WebUserControl>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    
    </div>
        <br />
        <br />
        <br />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    </form>
</body>
</html>Default2.aspx.cs
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %><%@ Register Src="WebUserControl.ascx" TagName="WebUserControl" TagPrefix="uc1" %><!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="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="ID">
            <Columns>
                <asp:TemplateField HeaderText="Name">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField HeaderText="Type">
                    <EditItemTemplate>
                        <asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Type") %>'></asp:TextBox>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <uc1:WebUserControl id="WebUserControl1" Type='<%# Convert.ToInt32(Eval("Type")) %>' runat="server">
                        </uc1:WebUserControl>
                    </ItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>
    
    </div>
        <br />
        <br />
        <br />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    </form>
</body>
</html>
Default2.aspx.csusing System;
using System.Data;
using System.Configuration;
using System.Collections;
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;public partial class Default2 : System.Web.UI.Page
{
    DataTable Dt ;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
           
        
        } Dt = new DataTable();
            Dt.Columns.Add(new DataColumn("ID"));
            Dt.Columns.Add(new DataColumn("name"));
            Dt.Columns.Add(new DataColumn("type"));
            DataRow DR;
            DR = Dt.NewRow();
            DR["ID"] = 1;
            DR["name"] = "aa";
            DR["Type"] = 1;
            Dt.Rows.Add(DR);            DR = Dt.NewRow();
            DR["ID"] = 2;
            DR["name"] = "bb";
            DR["Type"] = 2;
            Dt.Rows.Add(DR);
            DR = Dt.NewRow();
            DR["ID"] = 3;
            DR["name"] = "cc";
            DR["Type"] = 0;
            Dt.Rows.Add(DR);
       GridView1.DataSource = Dt;
        GridView1.DataBind();
        
       
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        GridView1.DataBind();
        for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            WebUserControl WUC;
            GridView1.SelectedIndex = i;
            WUC = (WebUserControl)GridView1.SelectedRow.FindControl("WebUserControl1");
            Response.Write(WUC.Type);
        }
    }
}
现在的问题是，单击提交按钮后，那些单选等控件的选中状态都没有了，怎么才能把这些状态保存下来？或者说得到这些选中状态？

解决方案 »

  1.   

    应该是不会点个按钮就将其他控件的状态清空的
    你把绑定数据的代码写到if(!Page.IsPostBack)下面
    写在外面的话点一次按钮就会重新执行一次绑定
      

  2.   


     protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
               Dt = new DataTable();
                Dt.Columns.Add(new DataColumn("ID"));
                Dt.Columns.Add(new DataColumn("name"));
                Dt.Columns.Add(new DataColumn("type"));
                DataRow DR;
                DR = Dt.NewRow();
                DR["ID"] = 1;
                DR["name"] = "aa";
                DR["Type"] = 1;
                Dt.Rows.Add(DR);            DR = Dt.NewRow();
                DR["ID"] = 2;
                DR["name"] = "bb";
                DR["Type"] = 2;
                Dt.Rows.Add(DR);
                DR = Dt.NewRow();
                DR["ID"] = 3;
                DR["name"] = "cc";
                DR["Type"] = 0;
                Dt.Rows.Add(DR);
                GridView1.DataSource = Dt;
                GridView1.DataBind();
           } 
           
        }
      

  3.   

    fly_goldfish 的方法不管用，单击那个button后的页面就什么都不显示了：（