C# 如何从url获取参数
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How can I get the parameters from url
提问by bowang
I'm writing an aspx to let users check the filename and create a file with that name
我正在编写一个 aspx 来让用户检查文件名并使用该名称创建一个文件
the url is
网址是
/sites/usitp/_layouts/CreateWebPage.aspx?List=%7b74AB081E-59FB-45A5-876D-
284607DA03C6%7d&RootFolder=%3bText=%27SD_RMDS%27
how can I parse the parameter 'Text' and show in the textbox?
如何解析参数“文本”并显示在文本框中？
<div>
<asp:TextBox id="Name" runat="server" />
</div>
the aspx text box is this, I tried
aspx 文本框是这个，我试过了
<asp:TextBox id="Name" runat="server" text=<%$Request.QueryString['Text']%>></asp:TextBox>>
but it didn't work
但它没有用
anyone can help me out?
任何人都可以帮助我吗？
回答by Remy
Actually, it would be
其实会是
string value = Name.Text;
回答by Kirill Bestemyanov
If you want get text value from Querystring you need to use:
如果您想从 Querystring 获取文本值，您需要使用：
var text = (string)Request.QueryString["Text"];
Then you can bind it to Text property of TextBox Name:
然后你可以将它绑定到 TextBox Name 的 Text 属性：
Name.Text = text;
Update:You can initialize you server controls values only on PageLoad event.
更新：您只能在 PageLoad 事件上初始化您的服务器控件值。
回答by Th 00 m? s
To get the value for the http get Parameter:
要获取 http get 参数的值：
string testParameter = Request.QueryString["Text"];
then set the Textbox Text
然后设置文本框文本
Name.Text = testParameter
Also its strongly suggested to not take Content directly from the url as malicious content could be injected that way into your page. ASP offers some protection from this, still its considered a good practice.
此外，强烈建议不要直接从 url 获取内容，因为恶意内容可能会以这种方式注入您的页面。ASP 提供了一些保护，但它仍然被认为是一种很好的做法。
回答by Kevin Main
You seem to be missing an & in your url between RootFolder and Text so change it to this -
您似乎在 RootFolder 和 Text 之间的 url 中缺少 &，因此将其更改为 -
/sites/usitp/_layouts/CreateWebPage.aspx?List=%7b74AB081E-59FB-45A5-876D-284607DA03C6%7d&RootFolder=%3b&Text=%27SD_RMDS%27
In terms of binding your are almost right, this should do it -
在绑定方面你几乎是正确的，这应该这样做 -
<asp:TextBox id="Name" runat="server" text='<%#Request.QueryString["Text"]%>'></asp:TextBox>
However, if you run this now it will not work as you will need to call DataBind() in your PageLoad like this
但是，如果您现在运行它，它将无法工作，因为您需要像这样在 PageLoad 中调用 DataBind()
protected void Page_Load(object sender, EventArgs e)
{
DataBind();
}
This should do as you want although it is probably easier just to do this directly in your PageLoad like this -
这应该按照您的意愿进行，尽管像这样直接在您的 PageLoad 中执行此操作可能更容易 -
Name.Text = Request.QueryString["Text"];
回答by Shadow Wizard is Ear For You
If you don't have access to the code behind (common limitation in SharePoint) then you can use JavaScript "hack" to populate the textbox with the URL value.
如果您无权访问背后的代码（SharePoint 中的常见限制），那么您可以使用 JavaScript“hack”来使用 URL 值填充文本框。
To achieve this, place this code in the very bottom of the .aspxpage with the textbox:
为此，请将此代码放置在.aspx带有文本框的页面最底部：
<script type="text/javascript">
var strTextBoxId = "<%=Name.ClientID%>";
var oTextBox = document.getElementById(strTextBoxId);
if (oTextBox) {
oTextBox.value = "<%=Request.QueryString["Text"].Replace("\"", "\\"")%>";
}
else {
//debug
alert("element with ID '" + strTextBoxId + "' does not exist");
}
</script>
Note this is notgood practice, just a way around when you can't do the best practice solution.
请注意，这不是好的做法，只是当您无法执行最佳实践解决方案时的一种解决方法。
