OnCheckedChanged 事件未触发
我有一个带有一列复选框的 GridView（GridView 的其余部分是从数据库填充的）。我正在使用 AJAX 来执行不同的功能，我想知道我是否没有在正确的位置调用 OnCheckedChanged 事件。是否应该将其包装在某种 UpdatePanel 中？我对所有这些工作原理仍然很陌生......基本上我的目标是在选中复选框时更改数据库中的一个位值。我知道如何做到这一点的逻辑，我只是不知道我是否以正确的方式处理我的 OnCheckedChanged 事件。
.CS.aspx
protected void CheckBoxProcess_OnCheckedChanged(Object sender, EventArgs args)
{
CheckBox checkbox = (CheckBox)sender;
GridViewRow row = (GridViewRow)checkbox.NamingContainer;
OrderBrowser.Text += "CHANGED";
}
}
<html xmlns="http://www.w3.org/1999/xhtml">
<asp:DropDownList runat="server" ID="orderByList" AutoPostBack="true">
<asp:ListItem Value="fName" Selected="True">First Name</asp:ListItem>
<asp:ListItem Value="lName">Last Name</asp:ListItem>
<asp:ListItem Value="state">State</asp:ListItem>
<asp:ListItem Value="zip">Zip Code</asp:ListItem>
<asp:ListItem Value="cwaSource">Source</asp:ListItem>
<asp:ListItem Value="cwaJoined">Date Joined</asp:ListItem>
</asp:DropDownList>
</div>
<div>
<asp:Label runat="server" ID="searchLabel" Text="Search For: " />
<asp:TextBox ID="searchTextBox" runat="server" Columns="30" />
<asp:Button ID="searchButton" runat="server" Text="Search" />
</div>
<div>
<asp:UpdatePanel ID = "up" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID = "orderByList"
EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlId="searchButton" EventName="Click" />
</Triggers>
<ContentTemplate>
<div align="center">
<asp:GridView ID="DefaultGrid" runat = "server" DataKeyNames = "fName"
onselectedindexchanged = "DefaultGrid_SelectedIndexChanged"
autogenerateselectbutton = "true"
selectedindex="0">
<SelectedRowStyle BackColor="Azure"
forecolor="Black"
font-bold="true" />
<Columns>
<asp:TemplateField HeaderText="Processed">
<ItemTemplate>
<asp:CheckBox ID="CheckBoxProcess" runat="server" Enabled="true" OnCheckedChanged = "CheckBoxProcess_OnCheckedChanged" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<asp:TextBox ID="OrderBrowser" columns="100" Rows="14" runat="server" Wrap="false" TextMode="MultiLine" ReadOnly = "true">
</asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
I have a GridView with a column of checkboxes (the rest of the GridView is being populated from a database). I'm using AJAX to perform different functions, and I'm wondering if i'm just not calling the OnCheckedChanged event in the right place. Should it be wrapped in some sort of UpdatePanel? I'm still really new to how all of this works...basically what I'm aiming for is to change a bit value in my database when a checkbox is checked. I know the logic of how to do that, I just don't know if I'm addressing my OnCheckedChanged event the right way.
.CS
protected void CheckBoxProcess_OnCheckedChanged(Object sender, EventArgs args)
{
CheckBox checkbox = (CheckBox)sender;
GridViewRow row = (GridViewRow)checkbox.NamingContainer;
OrderBrowser.Text += "CHANGED";
}
}
.aspx
<html xmlns="http://www.w3.org/1999/xhtml">
<asp:DropDownList runat="server" ID="orderByList" AutoPostBack="true">
<asp:ListItem Value="fName" Selected="True">First Name</asp:ListItem>
<asp:ListItem Value="lName">Last Name</asp:ListItem>
<asp:ListItem Value="state">State</asp:ListItem>
<asp:ListItem Value="zip">Zip Code</asp:ListItem>
<asp:ListItem Value="cwaSource">Source</asp:ListItem>
<asp:ListItem Value="cwaJoined">Date Joined</asp:ListItem>
</asp:DropDownList>
</div>
<div>
<asp:Label runat="server" ID="searchLabel" Text="Search For: " />
<asp:TextBox ID="searchTextBox" runat="server" Columns="30" />
<asp:Button ID="searchButton" runat="server" Text="Search" />
</div>
<div>
<asp:UpdatePanel ID = "up" runat="server">
<Triggers>
<asp:AsyncPostBackTrigger ControlID = "orderByList"
EventName="SelectedIndexChanged" />
<asp:AsyncPostBackTrigger ControlId="searchButton" EventName="Click" />
</Triggers>
<ContentTemplate>
<div align="center">
<asp:GridView ID="DefaultGrid" runat = "server" DataKeyNames = "fName"
onselectedindexchanged = "DefaultGrid_SelectedIndexChanged"
autogenerateselectbutton = "true"
selectedindex="0">
<SelectedRowStyle BackColor="Azure"
forecolor="Black"
font-bold="true" />
<Columns>
<asp:TemplateField HeaderText="Processed">
<ItemTemplate>
<asp:CheckBox ID="CheckBoxProcess" runat="server" Enabled="true" OnCheckedChanged = "CheckBoxProcess_OnCheckedChanged" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</div>
<asp:TextBox ID="OrderBrowser" columns="100" Rows="14" runat="server" Wrap="false" TextMode="MultiLine" ReadOnly = "true">
</asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
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评论（2）
尝试为复选框控件打开 AutoPostBack。
这可能是您的方法未被调用的原因。
Try turning AutoPostBack on for the checkbox control.
This maybe the reason your method isn't being called.
请尝试使用数据库检查该值：
Checked='<%# Convert.ToBoolean(Eval("Processed"))%>'Please try to check the value with the DB:
Checked='<%# Convert.ToBoolean(Eval("Processed"))%>'