C# 单击asp.net按钮时如何在url后添加查询字符串
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How to add a querystring after url when asp.net button is clicked
提问by HanYi Zhang
I have a asp.net page that has a button to click. When click on it, I wish to have a querystring such as ?id=1 added after the normal url. How can I do that from server side c# code?
我有一个 asp.net 页面，有一个按钮可以点击。单击它时，我希望在普通 url 之后添加一个查询字符串，例如 ?id=1。我怎样才能从服务器端 C# 代码做到这一点？
采纳答案by Jasmine
Three ways... server-side redirect, LinkButton, and client-side button or link.
三种方式...服务器端重定向、LinkButton 和客户端按钮或链接。
You can have your button event handler redirect to a location with a querystring...
您可以将按钮事件处理程序重定向到带有查询字符串的位置...
Response.Redirect("myPage.aspx?id=" + myId.toString(), true);
You can render the button as a LinkButton and set the URL...
您可以将按钮呈现为 LinkButton 并设置 URL...
LinkButton myLinkButton = new LinkButton("myPage.aspx?id=" + myId.toString(), true);
Or, you can render the button as a client side link - this is what I do when using Repeater controls...
或者，您可以将按钮呈现为客户端链接 - 这就是我在使用中继器控件时所做的......
<a href='myPage.aspx?id=<%# Eval("myID") %>'>Link</a>
I prefer the last method, particularly when I need a whole bunch of links.
我更喜欢最后一种方法，特别是当我需要一大堆链接时。
BTW, this is application of KISS - all you need is a regular old link, you don't need to jump through server-side hoops to create a link with a querystring in it. Using regular client-side HTML whenever possible is how to keep ASP.Net simple. I don't see enough of that technique in the wild.
顺便说一句，这是 KISS 的应用程序 - 您只需要一个常规的旧链接，您不需要跳过服务器端箍来创建带有查询字符串的链接。尽可能使用常规的客户端 HTML 是保持 ASP.Net 简单的方法。我在野外看不到足够的这种技术。
回答by DeveloperBuddy
There are various way to add querystring in url. You can use following code If you want to add value on server side:
有多种方法可以在 url 中添加查询字符串。如果要在服务器端添加值，可以使用以下代码：
protected void Button_Click(object sender, EventArgs e)
{
Int32 id = 1;
// Or your logic to generate id
string url = String.Format("anypage.aspx?id={0}",id.ToString());
}
回答by Vishal Gupta
How to build a query string for a URL in C#?
Or you can use this code.
或者您可以使用此代码。
string url = Request.Url.GetLeftPart(UriPartial.Path);
url += (Request.QueryString.ToString() == "" ) ? "?pagenum=1" : "?" + Request.QueryString.ToString() + "&pagenum=1";
回答by user0474975
I realize this is an old question, but I had the exact same problem when we wanted to create a new URL string so Google Analytics could "count" when a form was submitted.
我意识到这是一个老问题，但是当我们想要创建一个新的 URL 字符串以便 Google Analytics 可以在提交表单时“计数”时，我遇到了完全相同的问题。
I was using an ASP:Button to submit the form and saving to a database and displaying a thank-you message on postback. Therefore, the URL pre- and post-submit was the same, and I had to modify it in some way.
我使用 ASP:Button 提交表单并保存到数据库并在回发时显示感谢消息。因此，提交前和提交后的 URL 是相同的，我不得不以某种方式对其进行修改。
I used the following code and it worked for me:
我使用了以下代码，它对我有用：
C#, in Page_Load:
C#，在 Page_Load 中：
btnSubmit.PostBackUrl = "Page.aspx?id=" + id.ToString() + "&newquerystring=newvalue";
where Page.aspx is the page with the button that I want to postback to (the same page), ID is a dynamic ID I'm using to grab content from our CMS, and obviously the new querystring item.
其中 Page.aspx 是带有我想要回发到的按钮的页面（同一页面），ID 是我用来从我们的 CMS 中获取内容的动态 ID，显然是新的查询字符串项。
I hope this helps.
我希望这有帮助。
