将EditText转换为Int

我让用户将他们的身高和体重输入EditText，然后计算他们的BMI。我试图将EditText转换为int，这样我就可以进行计算。将EditText转换为Int

EditText userHeight = FindViewById<EditText>(Resource.Id.editTextHeight); 
EditText userWeight = FindViewById<EditText>(Resource.Id.editTextWeight); 


int intuserweight = Convert.ToInt32(userWeight.Text); 
intuserweight = int.Parse(userWeight.Text); 

int intuserheight = Int32.Parse(userHeight.Text);

我已经尝试了两种转换，并且都是System.FormatException: Input string was not in a correct format。

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 

using Android.App; 
using Android.Content; 
using Android.OS; 
using Android.Runtime; 
using Android.Views; 
using Android.Widget; 

namespace AndroidDoctorApp 
{ 
[Activity(Label = "Enter Intake")] 
public class EnterIntake : Activity 
{ 
    protected override void OnCreate(Bundle savedInstanceState) 
    { 
     base.OnCreate(savedInstanceState); 

     // Create your application here 

     SetContentView(Resource.Layout.EnterIntake); 



     EditText userDate = FindViewById<EditText>(Resource.Id.editTextDate); 
     EditText userTime = FindViewById<EditText>(Resource.Id.editTextTime); 
     EditText userHeight = FindViewById<EditText>(Resource.Id.editTextHeight); 
     EditText userWeight = FindViewById<EditText>(Resource.Id.editTextWeight); 

     Button btnBMI = FindViewById<Button>(Resource.Id.btnCalcBMI); 
     Button btnAddHistory = FindViewById<Button>(Resource.Id.buttonAddHistory); 
     Button btnViewHistory = FindViewById<Button>(Resource.Id.buttonViewHistory); 




     int bmi; 
     int intuserweight = int.Parse(userWeight.Text.ToString()); 
     // intuserweight = int.Parse(userWeight.Text); 


     int intuserheight = Int32.Parse(userHeight.Text); 

     bmi = intuserweight/(intuserheight * intuserheight); 


     btnBMI.Click += (object sender, EventArgs e) => 
     { 

      string toast = string.Format("Your BMI is: ", bmi); 
      Toast.MakeText(this, toast, ToastLength.Long).Show(); 


     }; 



     btnAddHistory.Click += (object sender, EventArgs e) => 
     { 

      string toast = string.Format("BMI Added to History "); 
      Toast.MakeText(this, toast, ToastLength.Long).Show(); 

     }; 


    } 
}

}

来源

2016-02-18 Wahm

您可能首先要检查的是如何'userWeight.Text'样子 – Ian

使用此：

的输入进级

编辑的完整代码

int userweight = int.Parse(userWeight.getText().toString());

编辑 INT BMI; int intuserweight; int intuserheight;

btnBMI.Click += (object sender, EventArgs e) => 
    { 
     intuserweight = int.Parse(userWeight.Text.ToString()); 
     intuserheight = int.Parse(userHeight.Text.ToString()); 

    bmi = intuserweight/(intuserheight * intuserheight); 
     string toast = string.Format("Your BMI is: ", bmi); 
     Toast.MakeText(this, toast, ToastLength.Long).Show(); 
    };

试试这个。对不起，任何语法错误（如果有的话），因为我是一个Java人，在C＃中不多。不要忘记告诉它是否有效。

来源

2016-02-18 12:52:32 Shuddh

@Wahm这样做解决问题了吗？ – Shuddh

是我已经试过了，但getText没有出现 'Android.Widget.EditText'没有包含'getText'的定义，也没有扩展方法'getText'接受类型为'Android.Widget.EditText'的第一个参数被发现（你是否缺少使用指令或程序集引用？） – Wahm

然后使用.Text.toString（） – Shuddh

你尝试像

int user_Weight=Integer.parseInt(userheight.gettext().toString());

来源

2016-02-18 12:54:04

将EditText转换为Int

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