验证C#中的单选按钮和复选框 [英] Validate radio buttons and check boxes in C#

问题描述

我希望有人能够帮助我.

我在提交"按钮上有一条try catch语句，希望验证一系列单选按钮和复选框.

内容如下:

I hope someone will be able to assist me.

I have a try catch statement on the submit button hoping to validate a series of radio buttons and check boxes.

It goes as follows:

try
{
if (btnButton1.Checked == "")
{ throw new Exception("Please provide a rating"); }
}

catch (Exception ex)

{
Response.Write(ex.Message);
}

从该消息看来，该操作员无法使用，并且我也不确定所选择的.Checked选项.

请协助.

谢谢.

From the message it appears the operator cannot be used, and I am also not sure about the .Checked option I chose.

Please assist.

Thank you.

推荐答案

RadioButton.Checked属性是一个布尔值:如果选中，则为true，否则为false.
因此，将它与空字符串进行比较永远是行不通的...

The RadioButton.Checked property is a bool : true if checked, false if not.
So comparing it against an empty string is never going to work...

if (!btnButton1.Checked)
{
 throw new Exception("Please provide a rating"); }
}

尝试使用:

Try using:

if (btnButton1.Checked == Checkstate.Checked)

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