In web pages, we sometimes need to control the "input state" of the text input box. Some key attributes cannot be modified. At this time, we need to set the readonly attribute of the text input box to False. In the web page, we can use
<input name="txt_name" type="text" readonly="readonly" id="txt_Status" name="txt_name" />
But in JS, we cannot use txt_name.readonly="readonly" to set this attribute. Since JS is case-sensitive, when calling this attribute, we must use txt_name.readOnly=true to set it.
Of course, the web page text box also has an attribute that can control its status, disabled. This attribute also restricts users from modifying the content of the text box. However, after this attribute is set to "disabled", the C# background code cannot obtain the content of this control. .