VB.NET App: Get Value from TextBox and stored in Array Variable

[karthickbabu]

Hi

Is Possible to store a value to declared Variable from Text Box at run time. I want to store a value from Text Box in 2 dimension array. First Value can be sotred in variable(0,0). If i press enter text box will be cleared and get another number and it stored in variable(0,1) and so on

I try the code as below but not working. I write this in Text Box KeyDown Event. If not in which event we write the code

Try
            If e.KeyCode = Keys.Enter Then
                For i As Integer = 0 To 1
                    For j As Integer = 0 To 1
                        FirstMatrixArray(i, j) = val(txtInput.Text)
                        txtInput.Text = ""
                        txtInput.Focus()
                    Next
                Next
            End If
    Catch ex As Exception
         MessageBox.Show(ex.Message())
End Try
 

hope ur reply

[Frinavale]

Hi

Is Possible to store a value to declared Variable from Text Box at run time. I want to store a value from Text Box in 2 dimension array. First Value can be sotred in variable(0,0). If i press enter text box will be cleared and get another number and it stored in variable(0,1) and so on

I try the code as below but not working. I write this in Text Box KeyDown Event. If not in which event we write the code

Try
            If e.KeyCode = Keys.Enter Then
                For i As Integer = 0 To 1
                    For j As Integer = 0 To 1
                        FirstMatrixArray(i, j) = val(txtInput.Text)
                        txtInput.Text = ""
                        txtInput.Focus()
                    Next
                Next
            End If
    Catch ex As Exception
         MessageBox.Show(ex.Message())
End Try
 

hope ur reply

I have a feeling that the string is getting lost when you clear the txtInput.Text. Remember that everything in VB.NET is a pointer...if you clear the value at the memory location where that pointer is pointing to....anything else referencing that memory location will be lost too.

So I suggest creating a new string based on the txtInput.Text to store in your FirstMatrixArray.

Eg:

FirstMatrixArray(i, j) = New String(txtInput.Text)

Hope this helps!
-Frinny

[karthickbabu]

I have a feeling that the string is getting lost when you clear the txtInput.Text. Remember that everything in VB.NET is a pointer...if you clear the value at the memory location where that pointer is pointing to....anything else referencing that memory location will be lost too.

So I suggest creating a new string based on the txtInput.Text to store in your FirstMatrixArray.

Eg:

FirstMatrixArray(i, j) = New String(txtInput.Text)

Hope this helps!
-Frinny

No Frinny still it lose tha data in that Array Variable. I got only one value what i type last in that TextBox. But if i give msg box to display. It display with Exception

[Frinavale]

No Frinny still it lose tha data in that Array Variable. I got only one value what i type last in that TextBox. But if i give msg box to display. It display with Exception

Hmm I took a look at your question again.
Are you sure you want to use the Text Box KeyDown Event?
Should you be using the KeyUp Event?

[karthickbabu]

I try in key up event no improvements, If i use

new string(textbox1.text)

it shows exception "converison from string to integer type is not valid ".

               For i As Integer = 0 To FirstMatrixArray.GetUpperBound(0)
                    For j As Integer = 0 To FirstMatrixArray.GetUpperBound(0)
                        'value = CInt(txtFirstInput.Text)
                        FirstMatrixArray(i, j) = CInt((txtFirstInput.Text).ToString)
                        MsgBox(FirstMatrixArray(i, j))
                        txtFirstInput.Text = ""
                        txtFirstInput.Focus()
                    Next
                Next
 

Just i test using msg box it displays in msgbox whatever i give in text box but with excetion, i used conversion type also but no changes in my result.

i post the same question in some other forum. Some body replies you should not be programming, values cannot be stored at run time. They suggest like these only

val(0,0)= 2
val(0,1) = 3
.
.
.and so on

Hmm I took a look at your question again.
Are you sure you want to use the Text Box KeyDown Event?
Should you be using the KeyUp Event?