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Old March 28th, 2013, 09:29 PM
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Default Program Hanging

I am working on a program that calculates class averages from each students scores. This button is supposed to create an inputbox to enter a new student name and add it to a list, clear the combobox drop down list selections and reset the student total variables so that my class total variables will accumulate correctly. I am also adding 1 to my numstudents every time the button is clicked (aka a new student is entered). The problem is when I click the button it brings up the Input Box and lets me enter a name and hit enter, but then it hangs and does not add the name to the list. I am not sure if it is the Input Box that is hanging or something about the way I am clearing the selected items. Any help would be greatly appreciated. I can email you the whole app if my code snippet is not enough to figure it out.

Private Sub btnNewStu_Click(sender As Object, e As System.EventArgs) Handles btnNewStu.Click
Dim strname1 As String
strname1 = InputBox("Student", "Name")
lstStuName.Items.Add(strname1)

numstudents = numstudents + 1

boxForum1.SelectedItem = False
boxForum2.SelectedItem = False
boxForum3.SelectedItem = False
boxForum4.SelectedItem = False
boxForum5.SelectedItem = False
boxForum6.SelectedItem = False
boxForum7.SelectedItem = False
boxForum8.SelectedItem = False
boxAssign1.SelectedItem = False
boxAssign2.SelectedItem = False
boxAssign3.SelectedItem = False
boxAssign4.SelectedItem = False
boxAssign5.SelectedItem = False
boxAssign6.SelectedItem = False
boxAssign7.SelectedItem = False
boxAssign8.SelectedItem = False
boxFinProj.SelectedItem = False
Form3.boxProj.SelectedItem = False

Dim a As Integer = 0
While a < ForumScores.Length
ForumScores(a) = 0
End While

Dim b As Integer = 0
While b < AssignScores.Length
AssignScores(b) = 0
End While

StuForumTotal = 0
StuForumAverage = 0
StuAssignTotal = 0
StuAssignAverage = 0
StuTotal = 0
StuFinalScore = 0

lblStuTotPts.Text = String.Empty

End Sub

Thanks
 
Old March 29th, 2013, 03:14 AM
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Default

Hi

Please have a look at the While loops with break point .. chances are it might be going infinitely

Code:
 
While a < ForumScores.Length
Cheers
Shasur
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Old March 29th, 2013, 09:28 AM
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Default

Thank you, Shasur. That is exactly what was holding it up. I was able to isolate it, by taking each separate piece of code out until it worked and didn't hang anymore. My two array loops were hanging it up.

I found this bit of code that sets all elements of an array to 0 or nothing and it solved my problem.

http://social.msdn.microsoft.com/For...-c1fb9e8d86d4/

Call System.Array.Clear(info, info.GetLowerBound(0), info.Length)

Where "info" is the name of the array.





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