Question Compare String from txt file and textbox.text

[thuyquai]

Can someone pls help me with this problem

first I create a class which have a string property

Property stdName() As String

then I open a text file and put into array of that class

Dim arrStudent() As Students

Dim allstdinfo As New IO.StreamReader(dlgOpenStudentsFile.FileName)
Do Until (allstdinfo.Peek() = -1)
Dim strAllstdinfo As String = allstdinfo.ReadLine()
Dim arrStudentLine() As String
arrStudentLine = strAllstdinfo.Split(New String() {"||"}, StringSplitOptions.RemoveEmptyEntries)
ReDim Preserve arrStudent(counter)
Dim singlestudent As New Students
singlestudent.stdName = arrStudentLine(0)
singlestudent.stdClass = arrStudentLine(1)
singlestudent.phoneNo = arrStudentLine(2)
singlestudent.averageScore = arrStudentLine(3)
arrStudent(counter) = singlestudent
counter += 1
Loop

Finally I run a for loop and compare the stdName property with textbox.text

Dim counter As Integer = arrStudent.Length

(debug here)
For i As Integer = 0 To counter - 1
If (String.Compare(arrStudent(i).stdName, txtStdName.Text) = 0) Then
lblPhoneNo.Text = arrStudent(i).phoneNo
End If
Next

and I add watch:

Why the compare return 1 (

 

[ggunter]

Look at your Watch.

arrStudent(i).stdName has an extra space at the end. Therefore, the strings are not equal.

 

[thuyquai]

Look at your Watch.

arrStudent(i).stdName has an extra space at the end. Therefore, the strings are not equal.

wow thankyou, I was too blind to not saw that

 

[helderjsd]

Dear user:

I dont know waht version of VB are you using, but the compare return (1/-1) or 0.

The case sensitive affects to the result.

See this example: Dim str1 As String
Dim str2 As String
str1 = "vb.net"
str2 = "VB.NET"
Dim result As Integer
result = String.Compare(str1, str2)
MsgBox(result)
result = String.Compare(str1, str2, True)
MsgBox(result)

Hope was usefull