Question

在我的母版页中，我在AspxComboBox项的ASPxMenu标记中有一个Template我可以在任意aspx页面上访问它但是当我尝试设置时其Value或SelectedIndex然后更改不更新

<dx:MenuItem>
          <Template>
             <dx:ASPxComboBox ID="CbalarmSelect" runat="server" AutoPostBack="true" ViewStateMode="Enabled"  OnSelectedIndexChanged="cbalarmselect_changed">
           <Items>
              <dx:ListEditItem Text="Select Option" Selected="true" Value="0" />
              <dx:ListEditItem  Text="Sample" Value="1" />
              <dx:ListEditItem Text="Demo" Value="2" />
           </Items>
   </dx:ASPxComboBox>
  </Template>
 </dx:MenuItem>

访问此ComboBox的C＃代码

 ASPxMenu item = (ASPxMenu)Master.FindControl("ASPxMenu1");  
 ASPxComboBox combo = (ASPxComboBox)item.Items.FindByName("AlarmSubscription").FindControl("CbalarmSelect");
 combo.SelectedIndex =1  ;

出于测试目的，我将其可见性设置为false combo.Visible = false;但是可见平均集功能无法正常工作

Answer 1

我试图在SelectedIndex事件期间设置Page_Load并且它无效。然后我在Page_LoadComplete事件中移动我的代码并且它对我有效

void Page_LoadComplete(object sender, EventArgs e)
{
                ASPxMenu item = (ASPxMenu)Master.FindControl("ASPxMenu1");  
                ASPxComboBox combo =         (ASPxComboBox)item.Items.FindByName("AlarmSubscription").FindControl("CbalarmSelect");
                combo.SelectedIndex =1  ;
}

Answer 2

客户端脚本

将ClientInstanceName属性设置为comboBox以将其作为cbxJobType访问客户端和ID属性以访问控制服务器端。

// by text
comboBox.SetText('Text #2');
// by value
comboBox.SetValue('Value #2');
// by index
comboBox.SetSelectedIndex(1);

服务器端代码

// by text
cbalarmSelect.Text = "Text #2";
// by value
cbalarmSelect.Value = "Value #2";
// by index
cbalarmSelect.SelectedIndex = 1;

此代码也可以正常工作：

cbalarmSelect.SelectedItem = cbalarmSelect.Items.FindByValue("Value #2");

ASPxComboBox , How to set selected item?

设置值或SelectedIndex功能在AspxComboBox中不起作用

2 个答案: