多重复选框下拉列表 [英] Multi check box drop down list

问题描述

大家好，

我为多重检查下拉列表创建了一个Web用户控件。

这是代码片段：

Hi All,
I have created a web user control for multi check drop down list.
Here is code snippet:

<asp:TextBox ID="txtCombo" runat="server" ReadOnly="true" Text="--Select--" CssClass="DropDownCss" BackColor="#EEEEEE" Width="225" Height="25" ></asp:TextBox>
<cc1:PopupControlExtender ID="PopupControlExtender111"  runat="server" 
    TargetControlID="txtCombo" PopupControlID="Panel111" Position="Bottom" >
</cc1:PopupControlExtender>

<input type="hidden" name="hidVal" id="hidVal" runat="server" />

<asp:Panel ID="Panel111" runat="server"  Width="230" BackColor="#EEEEEE" BorderColor="Gray" BorderWidth="1">
    
    <asp:CheckBoxList ID="chkList" 
        runat="server" 
        Height="150" onclick="CheckItem(this)">                                                                                                                                                                        
    </asp:CheckBoxList>
    
</asp:Panel>

控件正在获取绑定并显示值但是当页面获得回发时控制正在重新初始化。



即使页面回发，如何保持当前选定的值。



请建议



谢谢和问候，

Avinash

The control is getting bind and showing values but when page is getting postback the control is getting reinitialize.

How to keep current selected values even if page is postback.

Please suggest

Thanks and Regards,
Avinash

推荐答案

Loading of your checklist should check Page.isPostBack property and it not PostBack then load it.

if(!Page.isPostBack){
// load your checklist
}

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