Summary of how javascript calls front and back method instances

JS calls the background, the background calls the frontend, etc. Summary

1. Execute the function in the C# code in the javaScript function:

Method 1: 1. First establish A button writes the calling or processing content into Button1_Click in the background;

protected void Button1_Click(object sender, EventArgs e) 
{ 
this.TextBox1.Text = "voodooer"; 
}

2. It can be called like this in the foreground:

<input type="button" value="访问C#的方法" onclick=&#39;document.getElementById("Button1").click();&#39; />

Method 2: 1. The function is declared as public or protected

public string ss() 
{ 
return("voodooer"); 
}

2. Foreground calling method

<script language=javascript> 
var a = " <%=ss()%>"; 
alert(a); 
</script>

Method three: 1. ");

Method 2: Use Literal class, then

private void Button2_Click(object sender, System.EventArgs e) 
{ 
string str; 
str=" <script language=&#39;javascript&#39;>"; 
str+="selectRange()"; 
str+=" </script>"; 
//Literal1.Visible=true; 
Literal1.Text=str; 
}

The above is the detailed content of Summary of how javascript calls front and back method instances. For more information, please follow other related articles on the PHP Chinese website!