How to use textbox data of form1 in form2

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Hi,

I am trying to use textbox data(filename) of form1 in form2

C#

fileContents = SCANLA.Run.ReadingLogFile(CANTool.txtDataLogFile.Text);

In the above code CANTool is form1 and I am trying to use text box data (CANTool.txtDataLogFile.Text)of form1 in form2.

I am getting some error like below

Error 1 'SCANLA.CANTool.txtDataLogFile' is inaccessible due to its protection level
Error 2 An object reference is required for the non-static field, method, or property 'SCANLA.CANTool.txtDataLogFile'

How can I solve these errors

Thanks
John

Posted 20-Jan-14 3:59am

Member 10408451

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Sergey Alexandrovich Kryukov 20-Jan-14 10:28am

What do you mean by "TextBox"? Full type name, please. (I guess, System.Windows.Forms.TextBox, but you need to add the tag to your questions, in this case, System.Windows.Forms.)
What's wrong with using the property TextBox.Text (whatever it is)?
—SA

Marco Bertschi 20-Jan-14 10:36am

I guess he tries to reference a textbox located on form1 from form2, thus the "inaccessible due to its protection level "-error.
2nd, he didn't instatiate form1, thus the Error #2.

Sergey Alexandrovich Kryukov 20-Jan-14 10:38am

Of course. I tried to answer, please see.
—SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2014-01-20T04:37:00

You are using something which is not the instance of the class (object), but is a type.

For example:

C#

class MyClass {
    internal static string SomeStaticProperty { get; }
    internal int SomeInstanceProperty { get; }
}

//you can do
string text = MyClass.SomeStaticProperty;
//or
MyClass someInstance = new MyClass();
int value = someInstance.SomeInstanceProperty;
//but NOT
int value = MyClass.SomeInstanceProperty; // won't compile

Same thing about fields. You need to lean about instance and static members of types. You should not use trial-and-error "method" of writing, but need to understand every line you write.

As to the inaccessible members, learn access and access modifiers:
http://msdn.microsoft.com/en-us/library/ms173121.aspx[^],
http://msdn.microsoft.com/en-us/library/wxh6fsc7.aspx[^].

—SA

Marco Bertschi · Answer 2 · 2014-01-20T04:37:00

Solution 2

I'd recommend you to start from scratch[^].
Afterwards you can move on to this[^].

Posted 20-Jan-14 4:37am

Marco Bertschi

BillWoodruff · Answer 3 · 2014-01-20T04:39:00

Solution 3

edit #1 ...

Assuming that Form1 creates an instance of Form2, and that the instance of Form2 needs to access a TextBox on the instance of Form1:

In Form2:

Create a Public Property of Type 'TextBox:

C#

public TextBox tbFileName { get; set; } // you may be not need the 'get

In Form1:

private Form2 f2 = new Form2();

You need to inject the reference to the Textbox on Form1 into the Property of Type Textbox in the instance of Form2:

private void Form1_Load(object sender, EventArgs e)
{
     f2.tbFileName = nameOfYourTextBox;
}

Now, when you need to access Form1's TextBox in Form2:

C#

string currentTextInForm1 = tbFileName.Text;

Posted 20-Jan-14 4:39am

BillWoodruff

Updated 20-Jan-14 10:38am

v2

Comments

Member 10408451 20-Jan-14 13:09pm

I am trying like below
CANTool frm1 = new CANTool();

string[] fileContents = Run.ReadingLogFile(frm1.txtDataLogFile.Text);
I am getting error like below
A field initializer cannot reference the non-static field, method, or property 'SCANLA.GatewayMessages.frm1'

BillWoodruff 20-Jan-14 16:26pm

Okay, I may have mis-read your question; I assumed that Form1 needed to use a TextBox on Form2. I'll revise the code based on Form2 needing access to the TextBox on Form1.

What we need to know here is which is the main form: Form1, or Form2 ? Does Form1 create Form2, or, are both Forms created by another Form ?

I've posted a revised reply taking into account you want Form2 to access the TextBox on Form1.

Member 10497425 · Answer 4 · 2014-01-23T00:06:00

Try this:

If you create a new Form2:

C#

Form2 test = new Form2(this);

In the constructor of Form2 you write:

C#

public Form2 (Form1 caller)
{
     InitializeComponent();
     Form1 name;                 //Not object but class;
     name = caller;             //You can choose any name
}

And now you can use the Data

C#

TextBox anyname = (Textbox)name.Controls["NameofTextboxinForm1"];
anyname.Text = "";  //or label1.Text = anyname.Text;

I hope i could help

How to use textbox data of form1 in form2

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