事件文本已更改为TextBox [英] Event Text Changed of TextBox

问题描述

我有2个文本框，当我在ferst写东西时，seconde会禁用

这是代码

I have 2 textbox i want when i write something in the ferst the seconde will disable
this is the code

<asp:TextBox ID="TextBox2" runat="server" OnTextChanged="TextBox2_TextChanged"></asp:TextBox>

        <asp:TextBox ID="TextBox3" runat="server" Enabled="False"></asp:TextBox>

protected void TextBox2_TextChanged(object sender, EventArgs e)
        {

                if (TextBox2.Text != "")
                {
                    TextBox3.Enabled = false;
                }
                else
                {
                    TextBox3.Enabled = true;
                }
         }

但是当我在textbox2中写东西时，文本框不会禁用plz帮助我

but when i write something in textbox2 the Textbox don't disable plz help me

推荐答案

你需要为TextChanged处理程序执行回发以进行触发，添加值为True的AutoPostBack属性将为您执行此操作。



这样的事情：

Hi,

You'll need to perform a postback for the TextChanged handler to fire, adding the AutoPostBack attribute with a value of True will do this for you.

Something like this:

<asp:TextBox ID="TextBox2" runat="server" OnTextChanged="TextBox2_TextChanged" AutoPostBack="True"></asp:TextBox>

...希望它有所帮助。

... hope it helps.

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