如何使文本框在asp.net中不可编辑（c＃）

Question

I've creating one ASP web application, in that application one form have to update date value in the textbox field i put calender button near that textbox. it can update the date in that textbox field but its editable . i want update date value through only using calender button , i used read-only property but return empty value so not works .

Answer 1

Try client side html readonly attribute instead of ASP.NET server side readonly .

myTextBox.Attributes.Add("readonly", "readonly");

From MSDN,

The Text value of a TextBox control with the ReadOnly property set to true is sent to the server when a postback occurs, but the server does no processing for a read-only text box. This prevents a malicious user from changing a Text value that is read-only. The value of the Text property is preserved in the view state between postbacks unless modified by server-side code.

This is why textbox with server side readonly attribute has null value in postback.

Answer 2

You can use either TextBox1.Enabled = false; OR

TextBox1.Attributes.Add("readonly","readonly");

Difference is that if you make enabled= false then you cant pass the value of the textbox . If you need to pass the value of the textbox then you should use read-only property of textbox .

Answer 3

On page load event of your code behind file just write following code:

yourTextBoxName.Attributes.Add("readonly","readonly");

you can also do same by using property

Enabled="false"

on your aspx page but then you will not be able access its value in code behind page.

Answer 4

你可能想用这个

   TextBox1.Enabled = false;

Answer 5

您可以在asp.net中使textBox不可编辑

Answer 6

By using read only it will give problems on post back just set this java script property

onkeydown="javascript:return false"

by using this u can have properties like readonly and have absolutely no problem will araise