动态地将id分配给控件 - 控件位于asp .net中的datalist控件内 [英] dynamically assign id to controls - controls are inside datalist controls in asp .net

问题描述

嗨frnds，



我使用datalist来显示数据。数据是4个选项的测试题。我有50个问题在datalist中显示。



通过使用ItemDataBound事件 - 我只向用户显示一个带有4个选项的问题。剩下的问题是看不见的。在Itemdatabound事件中 - 我正在为单选按钮分配id。但是id也没有分配给datalist，它显示不同的id。

  if （e.Item .ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem）
 {
 HiddenField HdSlNo =（HiddenField）e.Item.FindControl（  HdSlNo）; 
 RadioButton Option1 =（RadioButton）e.Item.FindControl（  Option1）; 
 RadioButton Option2 =（RadioButton）e.Item.FindControl（  Option2）; 
 RadioButton Option3 =（RadioButton）e.Item.FindControl（  Option3）; 
 RadioButton Option4 =（RadioButton）e.Item.FindControl（  Option4）; 
 RadioButton Option5 =（RadioButton）e.Item.FindControl（  Option5）; 
 
 Option1.ID =   rdbtnoption1 _ + HdSlNo.Value.ToString（ ）; 
 Option2.ID =   rdbtnoption2 _ + HdSlNo.Value.ToString（）; 
 Option3.ID =   rdbtnoption3 _ + HdSlNo.Value.ToString（）; 
 Option4.ID =   rdbtnoption4 _ + HdSlNo.Value.ToString（）; 
 Option5.ID =   rdbtnoption5 _ + HdSlNo.Value.ToString（）; 
} 

谢谢，

Suresh

解决方案

在itemDataBound事件上，只需将问题ID和选项ID分配给单选按钮控件。

或者您可以使用for循环来迭代选项/ question并将项目索引值分配给控件。



请记住，将出现不同的ID，因为每个数据列表项中的控件都需要一个唯一的ClientID，所以正确生成html并且视图状态有效。

• 可以创建一个新的动态控件并重命名
• 但 DataList 将不允许您重命名在 ItemTemplate中定义的现有控件 ID
  
  看看这个 http://stackoverflow.com/a/18976091 [ ^ ]

Hi frnds,

I am using datalist for showing datas. Datas are test questions with 4 options.I have 50 questions displaying in datalist.

By using ItemDataBound event - i am making visible only one question with 4 options to user. Remaining questions are invisible . In the Itemdatabound event - i am assigning id to the radio buttons. but also id is not assigned to the datalist ,it showing different id.

if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
            {                
HiddenField HdSlNo = (HiddenField)e.Item.FindControl("HdSlNo");
                RadioButton Option1 = (RadioButton)e.Item.FindControl("Option1");
                RadioButton Option2 = (RadioButton)e.Item.FindControl("Option2");
                RadioButton Option3 = (RadioButton)e.Item.FindControl("Option3");
                RadioButton Option4 = (RadioButton)e.Item.FindControl("Option4");
                RadioButton Option5 = (RadioButton)e.Item.FindControl("Option5");
                
                Option1.ID = "rdbtnoption1_" + HdSlNo.Value.ToString();
                Option2.ID = "rdbtnoption2_" + HdSlNo.Value.ToString();
                Option3.ID = "rdbtnoption3_" + HdSlNo.Value.ToString();
                Option4.ID = "rdbtnoption4_" + HdSlNo.Value.ToString();
                Option5.ID = "rdbtnoption5_" + HdSlNo.Value.ToString();
}

Thanks,
Suresh

解决方案

On itemDataBound event just assign the question id and option id to the radio button controls.
Or you can use for loop to iterate over the options/questions and assign the item index value to the control.

Bear in mind that different IDs will appear because the controls inside each Data List item will need a unique ClientID so the html is generated correctly and view state works.

• It is possible to create a new dynamic control and to rename it
• but the DataList will not allow you to rename the existing control ID that is defined inside the ItemTemplate
  have a look at this http://stackoverflow.com/a/18976091[^]

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