Vbdotnet Substring [closed] - vb.net

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Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim reader As StreamReader = My.Computer.FileSystem.OpenTextFileReader(TextBox1.Text)
Dim a As String
a = reader.ReadLine
RichTextBox1.Text = RichTextBox1.Text + a
Label5.Text = RichTextBox1.Text.Substring(5, a.Substring(5, a.Length))
reader.Close()
End Sub
Hello. I am trying to read a text file and put the numbers in different variables. The textfile is like this
IMAGE
Every time i run the code it comes out with an error. What should i do?

Answer 1

What is it that you're trying to do with this line?
Label5.Text = RichTextBox1.Text.Substring(5, a.Substring(5, a.Length))
This part: a.Substring(5, a.Length) returns a string, but the second argument of Substring expects an integer, so it is causing an error.
Substring looks like this: Substring(startIndex As Integer, length As Integer). You are trying to pass a string into the second argument.
Simply dropping the second argument from that line seems that it would do what you want it to:
Label5.Text = RichTextBox1.Text.Substring(5)
If these types of problems are frequently affecting you, I highly suggest you turn Option Strict on in Visual Studio. Here are some instructions on how to do so.