asp.net文本框回发后不填充 [英] asp.net textbox doesn't populate after postback

问题描述

我使用ASP.NET和C＃夫妇文本框计算进入的结果。 TextBox2中具有输入值和点击链接Textbox1的被填充。这工作得很好，我第一次输入的值。但我改变TextBox2中的值第二次，我看到该值被分配到Textbox1的，而在按键的点击调试，但屏幕上显示不出来。我有很多其他控件和母版页。该文本框是一个更新面板内。

有人可以帮助我这是怎么回事？

下面是code：

 ＆LT; ASP：文本框ID =Textbox1的=服务器WIDTH =150像素的TabIndex =6MAXLENGTH =8＆GT;＆LT; / ASP：文本框＆GT ; ＆LT; ASP：的RequiredFieldValidator ID =RequiredFieldValidator7=服务器的ControlToValidate =TextBox1中的ErrorMessage =*＆GT;＆LT; / ASP：＆的RequiredFieldValidator GT;＆LT; ASP：文本框=服务器ID =TextBox2中WIDTH =150像素可见=假＆GT;＆LT; / ASP：文本框＆GT;＆安培; NBSP＆LT; ASP：ImageButton的=服务器ID =imgCalcAdjRate的ImageUrl =〜/资源/图像/ calrate_0.bmp的onmouseout =this.src ='.. /资源/图像/ calrate_0.bmp'的onmouseover = this.src ='.. /资源/图像/ calrate_1.bmp'HEIGHT =25像素WIDTH =25像素可见=假的onclick =imgCalcAdjRate_Click/＆GT;
 

解决方案

检查在Page_Load函数回发。

 如果（！Page.IsPostBack）{}
 

我觉得你正在失去的岗位信息反馈。该数据被更改，但它得到复位后回来了。

I am using ASP.NET and C# couple text boxes to calculate results entered. Textbox2 has a value entered and on button click Textbox1 gets populated. This works fine the first time I enter the value. But the second time I change the value in Textbox2, I see that the value is being assigned to Textbox1 while debugging on Button click, but doesn't show up on the screen. I have many other controls and a master page. The textboxes are within an update panel.

Can someone help me what's going on?

Here is the code:

<asp:TextBox ID="Textbox1" runat="server" Width="150px"   TabIndex="6" MaxLength="8"></asp:TextBox>                                                    <asp:RequiredFieldValidator ID="RequiredFieldValidator7" runat="server" ControlToValidate="TextBox1" ErrorMessage="*"></asp:RequiredFieldValidator>

<asp:TextBox runat="server" ID="Textbox2" Width="150px" Visible="false"></asp:TextBox>&nbsp

<asp:ImageButton runat="server" ID="imgCalcAdjRate" ImageUrl="~/Resource/Images/calrate_0.bmp" onmouseout="this.src='../Resource/Images/calrate_0.bmp'" onmouseover="this.src='../Resource/Images/calrate_1.bmp'"                    Height="25px" Width="25px" Visible="false" onclick="imgCalcAdjRate_Click" /> 

解决方案

Check the postback in the page_load function.

if(!Page.IsPostBack) {

}

I think you are loosing information on post back. The data is changed, but it get reset on post back.

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