javascript 将函数名称作为参数传递给另一个函数
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Passing function name as a parameter to another function
提问by Anu
I am calling a web services from client side on .aspx page, and I want to call a function on the success of this service.
我正在 .aspx 页面上从客户端调用 Web 服务，并且我想在此服务成功时调用一个函数。
The name of function will be passed as a parameter to this function, which will dynamically change.
函数名称将作为参数传递给该函数，该函数将动态更改。
I am passing it like this:
我是这样传递的：
function funName parm1, parm2, onSucceedCallFuntion
function onSucceedCallFuntion(result)
//doing something here.
Perhaps because it's a string is why the "succeed" function could not be called
也许因为它是一个字符串，所以无法调用“succeed”函数
function funName(parm1, par2, onSucceedFunName) {
$.ajax({
url: "../WebServices/ServiceName.asmx/ServiceFunName",
data: JSON.stringify({
parm1: parm1,
par2: par2
}), // parameter map type: "POST", // data has to be POSTED
contentType: "application/json",
dataType: "json",
success: onSucceedFunName,
});
function onSucceedFunName() {}
回答by sdleihssirhc
If you're passing the name of the function as a string, you could try this:
如果您将函数的名称作为字符串传递，则可以尝试以下操作：
window[functionName]();
But that assumes the function is in the global scope. Another, much better way to do it would be to just pass the function itself:
但这假设该函数在全局范围内。另一种更好的方法是只传递函数本身：
function onSuccess() {
alert('Whoopee!');
}
function doStuff(callback) {
/* do stuff here */
callback();
}
doStuff(onSuccess); /* note there are no quotes; should alert "Whoopee!" */
Edit
编辑
If you need to pass variables to the function, you can just pass them in along withthe function. Here's what I mean:
如果需要将变量传递给函数，只需将它们与函数一起传递即可。这就是我的意思：
// example function
function greet(name) {
alert('Hello, ' + name + '!');
}
// pass in the function first,
// followed by all of the variables to be passed to it
// (0, 1, 2, etc; doesn't matter how many)
function doStuff2() {
var fn = arguments[0],
vars = Array.prototype.slice.call(arguments, 1);
return fn.apply(this, vars);
}
// alerts "Hello, Chris!"
doStuff2(greet, 'Chris');
