使用参数从JavaScript调用C＃方法

I want to call a C# method with parameter from JavaScript. It is possible, if I remove the parameter s of the method <% showDetail(); %>

我想用JavaScript中的参数调用C＃方法。如果我删除方法<％showDetail（）的参数s，则有可能; ％>

function showDetail(kurz)
        {
            String s = kurz.toString();
            <% showDetail(s); %>;
        }

C# methods to test:

要测试的C＃方法：

public void showDetail(String s)
        {
            Label_Test.Text = s.ToString();
        }
public void showDetail()
        {
            Label_Test.Text = "";
        }

It works fine without parameter but with s variable I get a compiler error:

没有参数它工作正常，但有s变量我得到编译器错误：

CS0103: The name 's' does not exist in the current context

CS0103：当前上下文中不存在名称''

I have tried

我努力了

showDetail(Object s){....}

and also

并且

showDetail(String s){....}

but it does not work.

但它不起作用。

5 个解决方案

#1

Create a web method. That's an easy and neat way of calling c# methods from Javascript. You can call that method using jQuery Ajax. See the below example for a webMethod.

创建一个Web方法。这是从Javascript调用c＃方法的简单而简洁的方法。您可以使用jQuery Ajax调用该方法。有关webMethod的信息，请参阅以下示例。

[WebMethod]
public static string RegisterUser(string s)
{
    //do your stuff
    return stringResult;
}

and then call this method using jQuery ajax. You can pass parameters also. like given below

然后使用jQuery ajax调用此方法。您也可以传递参数。如下所示

function showDetail(kurz) { 
String sParam = kurz.toString(); 
    $.ajax({ 
    type: "POST", 
    url: "PageName.aspx/MethodName", 
    data: "{s:sParam}", // passing the parameter 
    contentType: "application/json; charset=utf-8", 
    dataType: "json", 
    success: function(retValue) {
        // Do something with the return value from.Net method
        } 
    }); 
}

#2

Use Hidden field to pass the value(set the value using javascript.). And call the javscript function with out parameter.. That value u can get it from the hidden field

使用隐藏字段传递值（使用javascript设置值）。并使用out参数调用javscript函数。该值可以从隐藏字段中获取

#3

You can achieve this by using WebMethods

您可以使用WebMethods实现此目的

First of all create a webmethod.

首先创建一个web方法。

    [WebMethod]
public string MethodName(string Parameter)
{
string msg=string.Empty;
//Your Code
return msg;
}

And in Java Script call that functions as

并在Java脚本调用中起作用

WebService.MethodName(Parameter,onSuccess,Error) // Here Webservice is the name of your asmx file

function onSuccess(result)
{
//Your code
}

function Error()
{
alert("Error");
}

#4

the solution provide by Varun Paul is the one I have used and it works as long you correct the following error: data: "{s:sParam}",

Varun Paul提供的解决方案是我使用的解决方案，只要您纠正以下错误，它就可以正常工作：数据：“{s：sParam}”，

It should be written as: data: { s:sParam },

它应该写成：data：{s：sParam}，

data is used to pass parameters to the C# method. Hope it helps. Thanks,

data用于将参数传递给C＃方法。希望能帮助到你。谢谢，

#5

-1

Its possible to interact c# application with javascript, use jint.dll for that

它可以与javascript交互c＃应用程序，使用jint.dll

Jint - Javascript Interpreter for .NET

Jint - .NET的Javascript解释器

For Example

例如

Following are the java script functions

以下是java脚本函数

function reverse(my_str)  
{ 
    var sb = new jintTestApplication.Test();//jintTestApplication is the namespace name
    return sb.Test1(reverse2(my_str) );
} 

function reverse2(my_str)  
{    
 var comStr="";  
    var result="";  
    var i=my_str.length;  

    i=i-1;  
     for (var x = i; x >=0; x--)  
      {  
        result= my_str.charAt(x);  
        comStr+=result;  
       }  
   return comStr; 
}

so in this case you have to create the object of your class inside the javascript and is possible to call a c# method

所以在这种情况下你必须在javascript中创建你的类的对象，并且可以调用c＃方法

            JintEngine engine = new JintEngine();
            engine.Run(ReadJavaScript());
            Console.WriteLine(engine.Run("reverse('Foooooo');"));

   public static  string ReadJavaScript()
   {
    string allines = File.ReadAllText(@"[path]\test.js");
   }



public void Test1(string message)
{
MessageBox.show(message);
}

#1