CODEWITHSUNDEEP
vb.net
anon ymous
anon ymous

Reputation: 39

Visual Basic error: expression does not produce a value

How can I fix this error? I have imported System.IO.File

error: expression does not produce a value

Imports System.IO.File
 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    TextBox9.Clear()
    If CheckBox1.Checked = True Then
        TextBox3.Text = "something"
    End If
    If CheckBox2.Checked = True Then
        TextBox3.Text = textbox3.text + "other things.."
    End If
    If CheckBox2.Checked = True Then
        TextBox3.Text = replace(textbox3.text, "a", "b")
    End If

 write = System.IO.File.AppendText("myfilepath")
        write.WriteLine(TextBox3.Text)
        write.Close()
End Sub

This line gets an error:

TextBox3.Text = replace(textbox3.text, "a", "b")

error:

Expression does not produce a value.

image

Upvotes: 0

Views: 3238

Answers (1)

Baro
Baro

Reputation: 5520

Try to change the line of code like this:

TextBox3.Text = Strings.Replace(textbox3.text, "a", "b")

Or like this:

TextBox3.Text = TextBox3.Text.Replace("a", "b")

In Visual Studio when you go hover with mouse, you can get some information, as the Namespace of the function/class etc... check it too.

Updated with explanation

The import of System.IO.Filebrings with it a method that does not produce results, so forcing the full name of the namespace (Strings.replace(...)), the issue is resolved, and there is no more conflict between the methods with the same name.

The MS guide for the method in namespace System.IO.File

Upvotes: 4

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