ASP.NET - 将 C# 变量传递给 HTML
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ASP.NET - Passing a C# variable to HTML
提问by Matthew
I am trying to pass variables declared in C# to html. The variables have all been declared as public in the code-behind.
我试图将在 C# 中声明的变量传递给 html。这些变量都在代码隐藏中声明为 public。
This is the HTML code I am using:
这是我正在使用的 HTML 代码：
<asp:TextBox ID="TextBoxChildID" Text='<%= Child_ID %>' runat="server" Enabled="false"></asp:TextBox>
The problem is that when the page loads, the text '<%= Child_ID %>' appears in the textbox instead of the value in the variable.
问题是当页面加载时，文本 '<%= Child_ID %>' 出现在文本框中，而不是变量中的值。
What is wrong please?
请问有什么问题？
采纳答案by David
All of this is assuming that this is just a textbox somewhere on your page, rather than in a DataBound control. If the textbox is part of an itemTemplate in a repeater, and Child_ID is something that differes by data row, then all of this is incorrect.
所有这些都假设这只是页面上某处的文本框，而不是 DataBound 控件中的文本框。如果文本框是转发器中 itemTemplate 的一部分，并且 Child_ID 是因数据行而不同的东西，那么所有这些都是不正确的。
Do this instead:
改为这样做：
<asp:TextBox ID="TextBoxChildID" runat="server" Enabled="false"><%= Child_ID %></asp:TextBox>
In short, you're making the same mistake I was making when I asked this question: Why <%= %> works in one situation but not in another
简而言之，当我问这个问题时，您犯了同样的错误：为什么 <%= %> 在一种情况下有效，但在另一种情况下无效
Alternatively, in code-behind, you can have this in your ASPX:
或者，在代码隐藏中，您可以在 ASPX 中使用它：
<asp:TextBox ID="TextBoxChildID" runat="server" Enabled="false"></asp:TextBox>
and this in your Code-Behind:
这在您的代码隐藏中：
TextBoxChildID.Text = Child_ID;
回答by Rafael Carvalho
The variable must be public first. And:
变量必须首先是公共的。和：
'<%# Child_ID %>'
回答by Pankaj
<script type="text/javascript">
function abc()
{
var id = document.getElementById('txtTextBox');
id.value=<%=MyProperty %>;
alert(id.value);
}
</script>
protected int MyProperty
{
get
{
return 1;
}
}
Page.RegisterStartupScript(Guid.NewGuid().ToString(),
"<script language = 'javascript'>abc();</script>");
回答by Rafael Carvalho
In the HTML:
在 HTML 中：
<asp:HiddenField ID="HiddenField1" runat="server" />
In The Codebehind:
在代码隐藏中：
protected void Page_Load(object sender, EventArgs e)
{
HiddenField1.Value = Child_ID;
}
It would be the best way, it creates a hidden input with the value.
这将是最好的方法，它创建一个带有值的隐藏输入。
