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

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;
}