回发时复选框状态未更改

Question

我对用户控件 (.ascx) 进行了以下标记

<table>
<tr>
    <td>
        <asp:Label ID="Label1" runat="server" Text="Select Logical Symbol to Search:"></asp:Label>
    </td>
    <td>
        <asp:DropDownList ID="ddlComponentType" runat="server" 
            onselectedindexchanged="ddlComponentType_SelectedIndexChanged" AutoPostBack="true">
        </asp:DropDownList>
    </td>
    <td>
        <asp:CheckBox ID="chkAdvSearchAllLibs" runat="server" ToolTip="Check this box to search all available libraries" Text="Search All Libraries"/>
    </td>
</tr>
<tr>
    <td>
        <asp:Label ID="Label2" runat="server" Text="Search by Logical Symbol Properties:"></asp:Label>
    </td>
    <td>
    </td>
</tr>

在页面加载

protected void Page_Load(object sender, EventArgs e)
{
     SearchResults(ref attributeSearch, compTypeID);
}

SearchResults 在哪里

 private void SearchResults(ref string attributeSearch, int compTypeID)
    {
        DataTable dtResults = this.AdvancedSearchControl.GetSearchResults(ref attributeSearch, compTypeID);
    }

在我的 UserControl.ascx.cs 中

public DataTable GetSearchResults(ref string _attrVals, int compTypeID)
{
                //Other Logic Goes Here
                IEnumerable<Model.ComponentInfo.ComponentType> compTypeResult = from compTypes in BLLibrary.GetComponentTypeBasedOnLib(this.CurrentLibraryId, this.CurrentLibrary, this.chkAdvSearchAllLibs.Checked) select compTypes.Value;
}

this.chkAdvSearchAllLibs.Checked 始终为 false，无论 check-box 是否在页面上被选中并回发。

Answer 1

服务器端：

将 AutoPostBack="True" 添加到复选框。它没有回发。

客户端：

<asp:CheckBox runat="server" ID="cb" onclick="checkboxchanged(this);" />

function checkboxchanged( sender ) {
if ( sender.checked ) {
        // clicked and checked
    } else {
        // clicked and unchecked
    }
}