ASP.NET front and back calls the method
- 2020-05-07 19:31:07
- OfStack
1.JavaScript accesses the C# function
2.JavaScript accesses C# variable
3. Access the existing variables of JavaScript in C#
4. How do I access the JavaScript function in C#
JavaScript accesses the C# function
method 1.
1. First, create a button and write the contents of the call or processing to button_click in the background;
2. Write one js function in the foreground, document.getElementById ("btn1").click ();
3. Call js function in the foreground or background, fire click event, equal to access the background c# function;
method 2.
1. Functions are declared as public or protected
2. In html < %=fucntion()% > You can call
method 3.
Access the C# variable in JavaScript
Method 1:1, through the page on the hidden field access < input id="xx" type="hidden" runat="server" >
Method 2:1, such as the background defined PUBLIC STRING N; The format of the reference to this variable in foreground js is' < %=n% > 'or "+ < %=n% > +"
Method 3:1, or you can register a script on the page after a server-side variable is assigned
" < script language='javascript' > var temp=" + tmp + " < /script > "
tmp is the background variable, and then js has direct access to temp to get the value.
An existing variable in C# that accesses JavaScript
Method 1:1. The foreground USES the static text control to hide the field and writes the js variable value into it.
2. The background USES request["id"] to get the value;
Method 2: you can use cookie or session
The JavaScript function is accessed in C#
Method 1:1, Page.RegisterStartupScript("ggg"," < script > SetVisible(1); < /script > ");
Method 2: use the Literal class, then
2.JavaScript accesses C# variable
3. Access the existing variables of JavaScript in C#
4. How do I access the JavaScript function in C#
JavaScript accesses the C# function
method 1.
1. First, create a button and write the contents of the call or processing to button_click in the background;
2. Write one js function in the foreground, document.getElementById ("btn1").click ();
3. Call js function in the foreground or background, fire click event, equal to access the background c# function;
method 2.
1. Functions are declared as public or protected
public string Hello()
{
return("Hello World");
}
2. In html < %=fucntion()% > You can call
<html xmlns="http://www.w3.org/1999/xhtml%22>
<head runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
function say()
{
var strHello = "<%=Hello()%>";
alert(strHello);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="say();" />
</div>
</form>
</body>
</html>
method 3.
<script language="javascript">
function __doPostBack(eventTarget, eventArgument)
{
var frontForm = document.Form1; // Refers to the runat=server the form
frontForm.__EVENTTARGET.value = eventTarget;
frontForm.__EVENTARGUMENT.value = eventArgument;
frontForm.submit();
}
</script>
<input id="Button1" type="button" name="Button1" value=" button " onclick="javascript:__doPostBack('Button1','')">
Access the C# variable in JavaScript
Method 1:1, through the page on the hidden field access < input id="xx" type="hidden" runat="server" >
Method 2:1, such as the background defined PUBLIC STRING N; The format of the reference to this variable in foreground js is' < %=n% > 'or "+ < %=n% > +"
Method 3:1, or you can register a script on the page after a server-side variable is assigned
" < script language='javascript' > var temp=" + tmp + " < /script > "
tmp is the background variable, and then js has direct access to temp to get the value.
An existing variable in C# that accesses JavaScript
Method 1:1. The foreground USES the static text control to hide the field and writes the js variable value into it.
2. The background USES request["id"] to get the value;
Method 2: you can use cookie or session
The JavaScript function is accessed in C#
Method 1:1, Page.RegisterStartupScript("ggg"," < script > SetVisible(1); < /script > ");
Method 2: use the Literal class, then
private void Button2_Click(object sender, System.EventArgs e)
{
string str;
str="<script language='javascript'>";
str+="selectRange()";
str+="</script>";
//Literal1.Visible=true;
Literal1.Text=str;
}