访问动态RadioButtonList数组对象 [英] Accessing a dynamic RadioButtonList array object

问题描述

我已经创建了RadioButtonList类的数组，但显然似乎无法访问它或使用从中检索到的答案.

我总是得到一个例外:对象引用未设置为对象的实例.

I''ve created an array of RadioButtonList class, but apparently can''t seem to access it or use the answer retrieved from it.

I always get the exception: Object reference not set to an instance of an object.

protected void Button5_Click(object sender, EventArgs e)
{


    RadioButtonList[] RBLPain = new RadioButtonList[2];





        RBLPain[0] = new RadioButtonList();


        RBLPain[0].Items.Add("Yes");

        RBLPain[0].Items.Add("No");

        Panel1.Controls.Add(RBLPain[0]);



            if (RBLPain[0].SelectedItem.Text == "Yes")
            {
               Response.Write(RBLPain[0].SelectedItem.Text);
            }


    }

任何帮助将不胜感激，谢谢您:)

Any help would be appreciated thanks :)

推荐答案

您可以像这样更改代码，添加一个判断:

you can alter your code like this , add a judgment :

ifRBLPain[0].SelectedItem != null)
{
  if (RBLPain[0].SelectedItem.Text == "Yes")
   {
       Response.Write(RBLPain[0].SelectedItem.Text);
   }
}

如果您还有其他疑问，请告诉我.

if you have a doubt else, let me know.

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