通过活动，从C＃的输入值 [英] pass input value from activities c#

问题描述

我想用户输入的文本从传递到活动1活性2。
我试过的东西很多，但所有的对我做了这个错误的东西，
这是错误当我试图把在TextView的价值我得到。

I'm trying to pass user input text from activity1 to activity2. I tried alot of thing but all of the thing did to me this error, this is the error i get when i'm trying to put the value in textview.

https://www.dropbox.com/s/cpsbflk4r1ep46x/error.PNG

//this is the first activity 

        SetContentView(Resource.Layout.Main);
        base.OnCreate(bundle);
        TextView t1 = FindViewById<TextView>(Resource.Id.t1);

        long l = 1;

        ImageButton i1 = FindViewById<ImageButton>(Resource.Id.i1);

        i1.Click += delegate
        {

            t1.Text = l++.ToString();
        };

        Button b1 = FindViewById<Button>(Resource.Id.b1);
        b1.Click += (sender, e) =>
        {
            string b = t1.Text;
            Intent intent = new Intent(this, typeof(Activity2));
            intent.PutExtra("j", b);
            StartActivity(intent);
        };

//this is the second activity

        TextView money = FindViewById<TextView>(Resource.Id.money);

        SetContentView(Resource.Layout.layout1);
        var l = this.Intent.Extras.GetString("j");

        money.Text = l;

感谢，

推荐答案

试试这个：

在主要活动

var activity2 = new Intent (this, typeof(next_activity));
                activity2.PutExtra ("value",i);
                StartActivity (activity2);  

在next_activity

On the next_activity

  var Passed_value  = Intent.GetStringExtra ("value",0);
    // for int use: Intent.GetIntExtra

也可以尝试改变

t1.Text = l++.ToString();

到

t1.Text = l++;

和

string b = t1.Text;

到

string b = t1.Text.ToString();

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