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Summary of methods such as js calling the background and the background calling the frontend_javascript skills

WBOYOriginal: 2016-05-16 16:52:151515browse

JS calls the background, the background calls the frontend and other methods summary

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

Method 1: 1. First create a button and put it in the background The content of the call or processing is written into Button1_Click;

Copy code The code is as follows:

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

2. You can call it like this in the foreground:

Copy code The code is as follows:

Method 2: 1. Declare the function as public or protected

Copy code The code is as follows:

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

2. Foreground calling method

Copy code The code is as follows:

Method three: 1.

Method 4:

Copy code The code is as follows:

〈! --Used to store the functions you want to call--〉

In .CS there are:

Copy code The code is as follows:

 
public Page_OnLoad() 
{ 
if (!Page.IsPost()) 
{ 
string strFunName=Request.Form[ "FunName"]!=null?Request.Form["FunName"]:""; 
//Determine which function to call based on the value passed back
switch(strFunName) 
{ 
case " enter()": 
enter(); //Call this function
break; 
case "other": 
//Call other functions
break; 
default: 
//Call the default function
break; 
} 
} 
} 
public void enter() 
{ 
//...such as calculating a certain value
} 

2. How to access C# variables in JavaScript?

The answer is as follows:

Method 1: 1. Access

Method 2: 1. If PUBLIC STRING N is defined in the background; the format for referencing this variable in the front-end js is' <%=n%>' or " <%=n%> ; "

Method 3: 1. Or you can register a script on the page after assigning values to server-side variables

" "

tmp is a background variable, and then you can directly access temp in js to get the value.

3. How to access existing variables of JavaScript in C#?

The answer is as follows:

Method 1: 1. Use static text control to hide the field in the frontend and change the js variable Write the value into it;

2. Use request["id"] in the background to get the value;

Method 2: You can use cookie or session

4. How to use C# Access JavaScript functions in?

The answer is as follows:

Execute javaScript functions in c# code:

Method 1: 1. Page.RegisterStartupScript("ggg"," ");

Method 2: Use the Literal class, then

Copy the code The code is as follows:

 
private void Button2_Click(object sender, System.EventArgs e) 
{ 
string str; 
str=" "; 
//Literal1.Visible=true; 
Literal1.Text=str; 
} 

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