C＃Visual Studio文本框转换为文本文件

Question

I'm new with visual studio c#. This is maybe a stupid question but I find no solution for next code. I'm trying to import a textbox (this works) and I want to import these into a text file.

    private void Rbalast_TextChanged(object sender, EventArgs e)
    {
        string balastR = Rbalast.Text;

    }
    private void EXPORT_Click(object sender, EventArgs e)
    {

    System.IO.StreamWriter file = new System.IO.StreamWriter("d:/VAR/200_runSheet_Tests/.txt");
    file.Write(balastR);
    file.Close();
}

I think it is because of the private void but I find no solution to change this.

Answer 1

Your problem here is the lack of knowledge in variable scope.

To solve this, you have two options.

1) place the variable balastR above the method Rbalast_TextChanged in the class scope, which will allow you to use it in the EXPORT_Click as you are currently doing.

2) Go by PoweredByOrange suggestion, and just replace file.Write(balastR); with file.Write(Rbalast.Text);