如何分享C＃和JavaScript之间的变量？ [英] How to share a variable between C# and JavaScript?

问题描述

我想分享的C＃和JavaScript之间的 currentTab 变量。这里是我的code：

I want to share the currentTab variable between C# and JavaScript. Here is my code:

C＃：

public int currentTab = 1;

protected void Page_Load(object sender, EventArgs e)
{
    Page.ClientScript.RegisterStartupScript(Type.GetType("System.String"), "addScript", "showTab(" + currentTab + ");", true);
}

JavaScript的：

var currentTab = "<%=currentTab%>";

function showTab(index)
{
    currentTab = index;
    // Show tab at (index)
}

我用这种办法来在回发再次显示当前选项卡。然而， currentTab 在C＃中剩余的 1 在回传。我怎样才能解决这个问题呢？

I used this approach to show the current tab again on PostBack. However, currentTab on C# is remaining 1 after PostBack. How can I solve this issue?

推荐答案

您可以从您的javascript函数写的指数，到hiddenfield，然后阅读上回发。

You can write the index from your javascript function, to a hiddenfield, and then read that on postback.

在您的code，你检查hiddenfield，如果你的页面是回发。
像这样：

In your code, you check the hiddenfield, if your page is postback. Like so:

protected void Page_Load(object sender, EventArgs e)
    {
        if (Page.IsPostBack)
        {
            currentTab = Int32.Parse(HiddenTabValue.Value);
        }

    }

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