无法访问modalpopup中的下拉列表值 [英] Not able to access dropdown value inside modalpopup
问题描述
我能够在modalpopup中选择下拉值。但是，当我将表单添加到母版页并将脚本管理器移动到母版页时。以下事件开始发生
模态弹出窗口位于更新面板内。我在模态弹出窗口中有一个下拉控件。当我在下拉列表中选择数据并在模态弹出窗口中单击确定时，无论我选择什么，它总是将下拉选择值显示为第一个索引。我无法找到解决方案。
当我将代码添加到现有母版页时，问题就出现了以下脚本管理器。
< asp：ScriptManager
ID =ScriptManagerRAMS
runat =server
ScriptMode =发布>
以下是步骤
1.模块弹出窗口是从Grid linkEdit启动的。模块弹出窗口在面板中。 Grid位于更新面板中围绕所有内容的面板之外。
步骤2.我使用
$ b加载Preload中的下拉列表$ b
if（！IsPostBack）
{
下拉列表在这里加载。
}
3.当模态弹出窗口可见时，下拉列表具有正确的值。但是当您设置手表时，您会看到{Please Select}的默认值。然后我尝试选择不同的值，您会看到{请选择}。你在OnSelectedIndexChanged中看到同样的东西。
注意：
我在MasterPage中有这个代码。所有内容都有更新面板。在下拉链接周围只有一个面板。我可以看到标签内容，但我在下拉列表中看到的唯一内容是默认选择。但是，显示的内容是正确的。当我尝试更改选择时。我仍然得到默认设置。这项工作在添加到母版页之前。
示例代码布局
< asp：UpdatePanel ID =UpdatePanel1runat =服务器> <&的ContentTemplate GT;
< asp：Panel ID =Panel1runat =server>
< asp：DropDownList ID =DropDownList1runat =serverAutoPostBack =trueOnSelectedIndexChanged =DropDownList1_SelectedIndexChanged> < asp：ListItem>红色
< asp：ListItem>绿色< asp：ListItem>蓝色
<触发器>
< asp：AsyncPostBackTrigger ControlID =DropDownList1EventName =SelectedIndexChanged/> < / Triggers>
我在正在运行的应用程序中使用以下内容。
<％ - < asp：ToolkitScriptManager ID =tsmrunat =server>
- ％>
主页不能正常使用以下内容
< asp：ScriptManager ID =ScriptManagerRAMSrunat =serverScriptMode =Release >
我尝试使用下面的一个并收到错误消息解析器错误消息：未知的服务器标签'asp：ToolkitScriptManager'。
<％ - < asp：ToolkitScriptManager ID =tsmrunat =server>
I was able to select dropdown value inside of modalpopup. But, when I added the form to a masterpage and move the scriptmanager to the Masterpage. The below events started happening
Modal popup is inside the update panel. I have a dropdown control inside modal popup. When i select the data in the dropdown and click ok on the modal popup it always shows the dropdown selectedvalue as first index no matter what i select . I am not able to find the solution for this.
The problem started when I added the code to a existing master page which has the following scriptmanager.
<asp:ScriptManager
ID="ScriptManagerRAMS"
runat="server"
ScriptMode="Release" >
Here are the steps
1. The modual popup is launch from the Grid linkEdit. The module popup is within a panel. The Grid is outside of the panel within the Update Panel that surrounds everything.
Step 2. I load the dropdown list within the Preload with a
if (!IsPostBack)
{
The dropdown are load here.
}
3. When the modal popup is visible the dropdown has the correct value. But when you set a watch you see the default value of {Please Select}. Then I attempt to select a different value and you see {Please Select}. You see the same thing within the OnSelectedIndexChanged.
Note:
I have this code within a MasterPage. There is Update panel around the everything. Within there is simply a panel around the dropdown links. I can see the label content but the only content that I see on the dropdown is the default selection. But, what is displayed is correct. When I try to make a change to the selection. I still get the default setting. This work before it was added to the masterpage.
Sample Code Layout
<asp:UpdatePanel ID="UpdatePanel1" runat="server"> <contenttemplate>
<asp:Panel ID="Panel1" runat="server">
<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> <asp:ListItem>Red
<asp:ListItem>Green <asp:ListItem>Blue
<Triggers>
<asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="SelectedIndexChanged" /> </Triggers>
I am using the following in the application that is working.
<%-- <asp:ToolkitScriptManager ID="tsm" runat="server">
--%>
The one with the masterpage that is not working is using the following
<asp:ScriptManager ID="ScriptManagerRAMS" runat="server" ScriptMode="Release" >
I tried using the one below and get a error message Parser Error Message: Unknown server tag 'asp:ToolkitScriptManager'.
<%-- <asp:ToolkitScriptManager ID="tsm" runat="server">
推荐答案
如果您的下拉列表位于更新面板中，则在您使用更新面板触发器之前，下拉列表selectedIndex将不会触发。
附加示例代码。试着去做。如果还有问题。发布代码。
If your dropdown is in the update panel then the dropdown selectedIndex will not fire until you used Update panel trigger.
A sample code is attached. try to make it. if still have problem. post the code.
<triggers>
<asp:asyncpostbacktrigger controlid="DropDownList1" eventname="SelectedIndexChanged" xmlns:asp="#unknown" />
</triggers>
在更新面板Modal弹出窗口中使用此触发器。
在控件ID中写下你的dropdownName，然后使用selectedIndex。
Use this trigger inside of your update panel Modal popup.
write your dropdownName in the control ID and then use the selectedIndex.
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