将参数传递给方法 [英] Passing parameter to a method

问题描述

嗨大家好，还在这里学习所以请耐心等待！



我试图将参数传递给我的方法，但不断得到编译错误



错误1 - 当前背景下不存在'vehicleMake'这个名称



以下代码，任何帮助都很多感谢，请简化您的答案，因为我还是新手，谢谢。

Hi folks, still learning here so please bear with me!

I am trying to pass a parameter to my method, but keep getting an complier error

Error1 - The name 'vehicleMake' does not exist in the current context

Code below, any help much appreciated, please simplify your answers as I’m still new to this, thanks.

public void RegReturn()
{

    string regNo;
    regNo = txtReg.Text;

    GetVehicleData RegSearch = new GetVehicleData();

    {
        RegSearch.GetTyreSize(regNo);
        TextBox1.Text = vehicleMake;

    }
}


public string GetTyreSize(string regNo)
{
    var service = new TyrescannerWebApp.com.carwebuk.www1.CarweBVRRWebService();
    var vehicleData = service.strB2BGetVehicleByVRM("regNo, "0.31.test");
    var vehicleMake = vehicleData.SelectSingleNode("//Vehicle/Combined_Make").InnerText;

    return vehicleMake;

}

推荐答案

读取范围 [ ^ ]变量以解决为什么你不能从调用方法访问方法中的变量。因为你有返回值，你可以使用如下所示。

read Scope [^] of variable to undestand why you can't access varible inside your method from calling method. since you have return value, you can use that as below.

string vehicleMake = RegSearch.GetTyreSize(regNo);
//use the return value from your method 
TextBox1.Text = vehicleMake;

当你使用它超出其范围时，很明显会出现此错误。你只能在GetTyreSize方法中使用它。



简单地使它成为全球（并不总是一个好方法）或返回它（好方法），如：

Its obvious to get this error as you are using it going beyond its scope. You can use it inside GetTyreSize Method only.

Simply make it Global(not always a good approach) or return it (good approach) like:

TextBox1.Text = RegSearch.GetTyreSize(regNo);

希望有所帮助：）

Hope it helps :)

这篇关于将参数传递给方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！