使用按钮在 aspx.cs 上调用 JavaScript 函数（在 aspx 中）
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Call JavaScript function (in aspx) on aspx.cs using a button
提问by kaub0st3r
I have this aspx:
我有这个aspx：
<body>
<div>
<script type="text/javascript">
function NewPage() {
document.location.href = "http://www.nextservice.pt/"
}
</script>
<form id="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Btn2" runat="server" Text="OK" onclick="Button2_Click" />
CODE1: <asp:Label ID="Label1" runat="server" Text="Label" ForeColor="#CC0000" />
</form>
</div>
</body>
and I'm working with web forms, and I wont call this button on aspx.cs
我正在处理网络表单，我不会在 aspx.cs 上调用这个按钮
public partial class SITE_TESTER : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button2_Click (object sender, EventArgs e)
{
string code = TextBox1.Text.ToString();
if (!verifyCode(code)) // comparing users from table
{
Label1.Text = "Not Exists"; //for invalid code
}
else
{
Label1.Text = "Exist"; //for sucsseful code
/*
I Wont call my JavaScript Function here!!!!
*/
}
}
}
回答by Manish Mishra
you can call a javascript method from server side in asp.net by following ways:
您可以通过以下方式在 asp.net 中从服务器端调用 javascript 方法：
protected void button_Click(object sender , EventArgs e)
{
string jsMethodName= = "NewPage()";
ScriptManager.RegisterClientScriptBlock(this, typeof(string), "uniqueKey", jsMethodName, true);
//or
//ScriptManager.RegisterStartupScript(this, GetType(), "NewPage()", false);
}
you can use either ScriptManager.RegisterStartupScriptor ScriptManager.RegisterClientScriptBlock
你可以使用ScriptManager.RegisterStartupScript或ScriptManager.RegisterClientScriptBlock
so difference between the two is explained below:
所以两者之间的区别解释如下：
Let's say we have a .aspx page with the following form tag : (Line nos. are for reference)
假设我们有一个带有以下表单标签的 .aspx 页面：（行号仅供参考）
1. <form id="Form1" runat="server">
2. ..
3. ..
4. ..
5. </form>
Now let's look at key differences for each method :
现在让我们看看每种方法的主要区别：
A.
Page.RegisterClientScriptBlock()will insert the blockof script
before Line 2.
Page.RegisterStartupScript()will insert the script after Line 4.
A.
Page.RegisterClientScriptBlock()将在第 2 行之前插入脚本块。
Page.RegisterStartupScript()将在第 4 行之后插入脚本。
B.
Page.RegisterClientScriptBlock()should usually be used for scripts
encapsulated in functions. (hence the word "block")
Page.RegisterStartupScript()can be used for any script, even if it's
not in a function.
B.
Page.RegisterClientScriptBlock()通常用于封装在函数中的脚本。（因此“块”一词）
Page.RegisterStartupScript()可用于任何脚本，即使它不在函数中。
C.
Page.RegisterClientScriptBlock()should be used for functions that
don't need to run on Page load.
Page.RegisterStartupScript()should be used for scripts that must run
on Page Load.
C.
Page.RegisterClientScriptBlock()应该用于不需要在页面加载时运行的功能。
Page.RegisterStartupScript()应该用于必须在页面加载时运行的脚本。
D.
Page.RegisterClientScriptBlock()should be used for a script that does
not require the form elements to have been created.
Page.RegisterStartupScript()should be used for scripts that require
the form elements to have been created and uses references to them.
D.
Page.RegisterClientScriptBlock()应用于不需要创建表单元素的脚本。
Page.RegisterStartupScript()应该用于需要创建表单元素并使用对它们的引用的脚本。
Notice that all the 4 differences are essentially related to each other (they build upon the prev. one). The difference put in one line can sometimes be too subtle.
请注意，所有 4 个差异本质上都是相互关联的（它们建立在上一个差异的基础上）。一行中的差异有时可能过于微妙。
回答by Viktor S.
You can add a script which will be executed when page is loaded to browser:
您可以添加将在页面加载到浏览器时执行的脚本：
Page.RegisterStartupScript("unique_key", "<script type=\"text/javascript\">NewPage()</script>"); // but this is deprecated function
or like this:
或者像这样：
ClientScript.RegisterClientScriptBlock(this.GetType(), "unique_key", "NewPage()", true);
But if you simply want to do a redirect (as I can see from your NewPage function), you can do:
但是如果你只是想做一个重定向（正如我从你的 NewPage 函数中看到的那样），你可以这样做：
Response.Redirect("http://www.example.com");
