当值通过JavaScript修改客户端回发后ASP.NET文本框失去价值 [英] ASP.NET textbox losing value after postback when value is changed client-side via javascript

问题描述

我是通过javascript客户端设置一个文本框的值。当我刷新页面的价值会丢失。

I am setting the value of a textbox via javascript client-side. When I refresh the page the value is lost.

文本框未禁用或者设置为只读。

The textbox is not disabled or set to read-only.

我已阅读建议把价值在一个隐藏字段，我想preFER没有做到这一点。这似乎是一个黑客。

I have read suggestions to put the value in a hidden field, I'd prefer not to do this. It seems like a hack.

文本框在用户控件这样：

The textbox is in a user control as such:

<div id="Row" class="RaidRow" runat="server">
    <asp:Button ID="RaidRowButton" runat="server" CssClass="RaidRowButton" OnClick="RaidRowButton_Click" />
    <asp:TextBox ID="CharacterNameTextBox" runat="server" CssClass="RaidRowControl SlotTextBox" MaxLength="12" />
    <asp:Label ID="ClassNameLabel" runat="server" CssClass="RaidRowControl ClassLabel" />
</div>

这是控制在.aspx页面上。

This control is on the .aspx page.

当用户双击文本框，presses进入，而文本框具有焦点，或更改文本，JavaScript函数以下称为：

When the user double-clicks the textbox, presses enter while the textbox has focus, or changes the text, the following javascript function is called:

function VerifyCharacter(slotNumber, event)
{
    var enterWasPressed = false;

    if (event && event.which == 13)
    {
    	enterWasPressed = true;
    }
    else if (window.event && window.event.keyCode == 13)
    {
    	enterWasPressed = true;
    }

    if (event == null || enterWasPressed)
    {
    	var realmName = 'Lightninghoof';

    	var characterNameTextBox = GetCharacterNameTextBox(slotNumber);
    	characterNameTextBox.style.color = '#CCCCCC';

    	var classLabel = GetClassNameLabel(slotNumber);
    	classLabel.style.color = '#CCCCCC';
    	classLabel.innerHTML = 'Unknown';

    	WoW_Stats.CharacterInformation.GetCharacterInformation(realmName, characterNameTextBox.value, slotNumber, GetCharacterInformation_Success, GetCharacterInformation_Failed);
    }
}

一旦Web服务调用完成后，下面的JavaScript函数被调用：

Once the web-service call is complete, the following javascript function is called:

function GetCharacterInformation_Success(characterInformationResult)
{
    var characterInfo = Sys.Serialization.JavaScriptSerializer.deserialize(characterInformationResult, true);

    var classLabel = GetClassNameLabel(characterInfo.SlotNumber);
    classLabel.style.color = characterInfo.ClassColor;
    classLabel.innerHTML = characterInfo.ClassName;

    var characterNameTextBox = GetCharacterNameTextBox(characterInfo.SlotNumber);
    characterNameTextBox.style.color = characterInfo.ClassColor;
}

唯一的问题是，当我刷新页面，在CharacterNameTextBox和ClassNameLabel文本，这是通过JavaScript设置客户端，都将丢失。

The only problem is that when I refresh the page, the text in the CharacterNameTextBox and ClassNameLabel, which were set client-side via javascript, are lost.

我怎样才能确保控件保留回发之间的价值？

How can I make sure the controls retain their value between postbacks?

推荐答案

刷新页面（pressing F5）比回传不同的。我不相信你的文本框中的值将被调回上刷新服务器。在文本框中的值将得到回发到上发的服务器虽然（只要文本框的只读属性未设置​​为true，但是这是一个不同的故事）。

Refreshing the page (pressing F5) is different than a postback. I don't believe the value in your text box is going to be posted back to the server on a refresh. The value in the text box will get posted back to the server on a postback though (as long as the ReadOnly attribute of the TextBox is not set to true, but that's a different story).

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