I'm building a program that using a service based database.
My first problem:
I want that when somebody clicks on one of the colors it will store a String in the database like "color_red"
Second problem:
I want that each radio button will store a different integer
Database Schema:
Relevant code:
Public Class Form2
Private Sub TableBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs) Handles TableBindingNavigatorSaveItem.Click
Me.Validate()
Me.TableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.Database1)
End Sub
Private Sub Form2_Load(sender As Object, e As EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Database1.Table' table. You can move, or remove it, as needed.
Me.TableTableAdapter.Fill(Me.Database1.Table)
End Sub
Private Sub TableDataGridView_CellContentClick(sender As Object, e As DataGridViewCellEventArgs)
End Sub
Private Sub TableBindingNavigator_RefreshItems(sender As Object, e As EventArgs) Handles TableBindingNavigator.RefreshItems
End Sub
Private Sub Nb_typeRadioButton_CheckedChanged(sender As Object, e As EventArgs) Handles Nb_typeRadioButton.CheckedChanged
End Sub
Private Sub PictureBox1_Click(sender As Object, e As EventArgs) Handles PictureBox1.Click
PictureBox1.BorderStyle = BorderStyle.Fixed3D
PictureBox2.BorderStyle = BorderStyle.FixedSingle
PictureBox3.BorderStyle = BorderStyle.FixedSingle
PictureBox4.BorderStyle = BorderStyle.FixedSingle
PictureBox5.BorderStyle = BorderStyle.FixedSingle
End Sub
Private Sub PictureBox2_Click(sender As Object, e As EventArgs) Handles PictureBox2.Click
PictureBox1.BorderStyle = BorderStyle.FixedSingle
PictureBox2.BorderStyle = BorderStyle.Fixed3D
PictureBox3.BorderStyle = BorderStyle.FixedSingle
PictureBox4.BorderStyle = BorderStyle.FixedSingle
PictureBox5.BorderStyle = BorderStyle.FixedSingle
End Sub
Private Sub PictureBox3_Click(sender As Object, e As EventArgs) Handles PictureBox3.Click
PictureBox1.BorderStyle = BorderStyle.FixedSingle
PictureBox2.BorderStyle = BorderStyle.FixedSingle
PictureBox3.BorderStyle = BorderStyle.Fixed3D
PictureBox4.BorderStyle = BorderStyle.FixedSingle
PictureBox5.BorderStyle = BorderStyle.FixedSingle
End Sub
Private Sub PictureBox4_Click(sender As Object, e As EventArgs) Handles PictureBox4.Click
PictureBox1.BorderStyle = BorderStyle.FixedSingle
PictureBox2.BorderStyle = BorderStyle.FixedSingle
PictureBox3.BorderStyle = BorderStyle.FixedSingle
PictureBox4.BorderStyle = BorderStyle.Fixed3D
PictureBox5.BorderStyle = BorderStyle.FixedSingle
End Sub
Private Sub PictureBox5_Click(sender As Object, e As EventArgs) Handles PictureBox5.Click
PictureBox1.BorderStyle = BorderStyle.FixedSingle
PictureBox2.BorderStyle = BorderStyle.FixedSingle
PictureBox3.BorderStyle = BorderStyle.FixedSingle
PictureBox4.BorderStyle = BorderStyle.FixedSingle
PictureBox5.BorderStyle = BorderStyle.Fixed3D
End Sub
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Try
Me.Validate()
Me.TableBindingSource.EndEdit()
Me.TableAdapterManager.UpdateAll(Me.Database1)
Catch ex As Exception
MsgBox(ex.Message)
End Try
Try
Dim db As New Database1TableAdapters.TableTableAdapter
Dim dbimg As String = db.GetData.Rows(0).Item(1)
PictureBox1.Image = My.Resources.ResourceManager.GetObject(dbimg)
Catch ex As Exception
MsgBox(ex.Message)
End Try
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
Me.Close()
End Sub
End Class
I will update my answer as soon as you provide more quality information.
For now here is what I understood you want to do:
In Button.Click event you should write:
If Me.Radiobutton1.Checked = True than
Value = 1 '' For Example
Else
Value = 2 '' For Example
End If
Or you can do it like this:
If Me.Radiobutton1.Checked = True than
Value = 1
ElseIf Me.Radiobutton2.Checked = True than
Value = 2
End if
This is about giving values according to checked RadioButton.
And about marked PictureBox I would just add to Button.Click event:
If Me.PictureBox1.BorderStyle = BorderStyle.Fixed3D Then
StringValue = 1
ElseIf Me.PictureBox2.BorderStyle = BorderStyle.Fixed3D Then
StringValue = 2
ElseIf Me.PictureBox3.BorderStyle = BorderStyle.Fixed3D Then
StringValue = 3
ElseIf Me.PictureBox4.BorderStyle = BorderStyle.Fixed3D Then
StringValue = 4
ElseIf Me.PictureBox5.BorderStyle = BorderStyle.Fixed3D Then
StringValue = 5
End If
Related
I already succeeded in made local database using datatable and it was displayed in datagridview. But I want to copy the values to array so I can process it in other code.
For example
coba(0,0) = data in datagridviewResources column 0 row 0
coba(0,1) = data in datagridviewresources column 0 row 1
But I got the error :
Index was out of range. Must be non-negative and less than the size of the collection.
My code:
Dim table As New DataTable("Table")
Dim index As Integer
Dim coba(100, 100) As String
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
table.Columns.Add("ID", Type.GetType("System.Int32"))
table.Columns.Add("Filename", Type.GetType("System.String"))
table.Columns.Add("Column", Type.GetType("System.Int32"))
datagridviewResources.DataSource = table
End Sub
Private Sub btnUpdate_Click(sender As Object, e As EventArgs) Handles btnUpdate.Click
Dim newDataRow As DataGridViewRow
newDataRow = datagridviewResources.Rows(index)
newDataRow.Cells(0).Value = txtID.Text
newDataRow.Cells(1).Value = txtFilename.Text
newDataRow.Cells(2).Value = txtColumn.Text
End Sub
Private Sub datagridviewResources_CellClick(sender As Object, e As DataGridViewCellEventArgs) Handles datagridviewResources.CellClick
index = e.RowIndex
Dim selectedRow As DataGridViewRow
selectedRow = datagridviewResources.Rows(index)
txtID.Text = selectedRow.Cells(0).Value.ToString()
txtFilename.Text = selectedRow.Cells(1).Value.ToString()
txtColumn.Text = selectedRow.Cells(2).Value.ToString()
End Sub
Private Sub btnDelete_Click(sender As Object, e As EventArgs) Handles btnDelete.Click
datagridviewResources.Rows.RemoveAt(index)
End Sub
Private Sub btnAdd_Click(sender As Object, e As EventArgs) Handles btnAdd.Click
table.Rows.Add(txtID.Text, txtFilename.Text, txtColumn.Text)
datagridviewResources.DataSource = table
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click, datagridviewResources.SelectionChanged
For i = 0 To table.Rows.Count
For j = 0 To table.Columns.Count
coba(i,j) = datagridviewResources.Rows(i).Cells(j).Value.ToString())
Next
Next
End Sub
I've written a C code to play 3 audio files one after other using vlc but the after playing first file it's not proceeding I've to press Ctrl+C or q to go to next song which I want to happen itself.
I placed system("q") after every file so that it may fulfill my task but it's still not working.
#include<stdio.h>
int main(){
system("vlc 1.mp3");
system("q");
system("vlc 2.mp3");
system("q");
system("vlc 3.mp3");
system("q");
return 0;
}
I think you should use mplayer in slave mode instead of vlc. It is more flexible and has more control. you can send command to mplayer as you wish. please study the following link
http://www.mplayerhq.hu/DOCS/tech/slave.txt
I suggest you to use python for linux and C# or VB.NET for windows. I can supply some vb.net code if you need it.
This was my old answer for another question.
but I will post here for you too.
I am developing android phone remote control + VB.NET TCP server - mplayer. I am using mplayer in slave mode. I send command from android app to VB.NET TCP server. Then the command will send to mplayer.
I will show some code that control and send the mplayer desired commands, but the server part is not finished yet. The coding is no finished yet but I hope it is useful for you.
Imports System.ComponentModel
Imports System.IO
Imports System.Data.OleDb
Public Class Form1
Private bw As BackgroundWorker = New BackgroundWorker
Dim i As Integer = 0
Dim dbFile As String = Application.StartupPath & "\Data\Songs.accdb"
Public connstring As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=" & dbFile & "; persist security info=false"
Public conn As New OleDbConnection(connstring)
Dim sw As Stopwatch
Dim ps As Process = Nothing
Dim jpgPs As Process = Nothing
Dim args As String = Nothing
Private Sub bw_DoWork(ByVal sender As Object, ByVal e As DoWorkEventArgs)
Dim worker As BackgroundWorker = CType(sender, BackgroundWorker)
If bw.CancellationPending = True Then
e.Cancel = True
Exit Sub
Else
' Perform a time consuming operation and report progress.
'System.Threading.Thread.Sleep(500)
bw.ReportProgress(i * 10)
Dim dir_info As New DirectoryInfo(TextBox1.Text)
ListFiels("SongList", TextBox2.Text, dir_info)
End If
End Sub
Private Sub bw_RunWorkerCompleted(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs)
If e.Cancelled = True Then
Me.tbProgress.Text = "Canceled!"
ElseIf e.Error IsNot Nothing Then
Me.tbProgress.Text = "Error: " & e.Error.Message
Else
Me.tbProgress.Text = "Done!"
End If
End Sub
Private Sub bw_ProgressChanged(ByVal sender As Object, ByVal e As ProgressChangedEventArgs)
Me.tbProgress.Text = e.ProgressPercentage.ToString() & "%"
End Sub
Private Sub Form1_FormClosing(sender As Object, e As FormClosingEventArgs) Handles Me.FormClosing
Try
ps.Kill()
Catch
Debug.Write("already closed")
End Try
End Sub
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Windows.Forms.Control.CheckForIllegalCrossThreadCalls = False 'To avoid error from backgroundworker
bw.WorkerReportsProgress = True
bw.WorkerSupportsCancellation = True
AddHandler bw.DoWork, AddressOf bw_DoWork
AddHandler bw.ProgressChanged, AddressOf bw_ProgressChanged
AddHandler bw.RunWorkerCompleted, AddressOf bw_RunWorkerCompleted
funPlayMusic()
End Sub
Private Sub buttonStart_Click(sender As Object, e As EventArgs) Handles buttonStart.Click
If Not bw.IsBusy = True Then
bw.RunWorkerAsync()
End If
End Sub
Private Sub buttonCancel_Click(sender As Object, e As EventArgs) Handles buttonCancel.Click
If bw.WorkerSupportsCancellation = True Then
bw.CancelAsync()
End If
End Sub
Private Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
If Not bw.IsBusy = True Then
sw = Stopwatch.StartNew()
bw.RunWorkerAsync()
sw.Stop()
Label1.Text = ": " + sw.Elapsed.TotalMilliseconds.ToString() + " ms"
End If
End Sub
Private Sub ListFiels(ByVal tblName As String, ByVal pattern As String, ByVal dir_info As DirectoryInfo)
i = 0
Dim fs_infos() As FileInfo = Nothing
Try
fs_infos = dir_info.GetFiles(pattern)
Catch ex As Exception
MessageBox.Show(ex.ToString())
End Try
For Each fs_info As FileInfo In fs_infos
i += 1
Label1.Text = i
insertData(tblName, fs_info.FullName)
lstResults.Items.Add(i.ToString() + ":" + fs_info.FullName.ToString())
If i = 1 Then
Playsong(fs_info.FullName.ToString())
Else
i = 0
lstResults.Items.Clear()
End If
Next fs_info
sw.Stop()
Label1.Text = ": " + sw.Elapsed.TotalMilliseconds.ToString() + " ms"
fs_infos = Nothing
Dim subdirs() As DirectoryInfo = dir_info.GetDirectories()
For Each subdir As DirectoryInfo In subdirs
ListFiels(tblName, pattern, subdir)
Next
End Sub
Private Sub insertData(ByVal tableName As String, ByVal foundfile As String)
Try
If conn.State = ConnectionState.Open Then conn.Close()
conn.Open()
Dim SqlQuery As String = "INSERT INTO " & tableName & " (SngPath) VALUES (#sng)"
Dim SqlCommand As New OleDbCommand
With SqlCommand
.CommandType = CommandType.Text
.CommandText = SqlQuery
.Connection = conn
.Parameters.AddWithValue("#sng", foundfile)
.ExecuteNonQuery()
End With
conn.Close()
Catch ex As Exception
conn.Close()
MsgBox(ex.Message)
End Try
End Sub
Private Sub btnClearList_Click(sender As Object, e As EventArgs) Handles btnClearList.Click
lstResults.Items.Clear()
End Sub
Private Sub funPlayMusic()
ps = New Process()
ps.StartInfo.FileName = "D:\Music\mplayer.exe "
ps.StartInfo.UseShellExecute = False
ps.StartInfo.RedirectStandardInput = True
jpgPs = New Process()
jpgPs.StartInfo.FileName = "D:\Music\playjpg.bat"
jpgPs.StartInfo.UseShellExecute = False
jpgPs.StartInfo.RedirectStandardInput = True
'ps.StartInfo.CreateNoWindow = True
args = "-fs -noquiet -identify -slave " '
args += "-nomouseinput -sub-fuzziness 1 "
args += " -vo direct3d, -ao dsound "
' -wid will tell MPlayer to show output inisde our panel
' args += " -vo direct3d, -ao dsound -wid ";
' int id = (int)panel1.Handle;
' args += id;
End Sub
Public Function SendCommand(ByVal cmd As String) As Boolean
Try
If ps IsNot Nothing AndAlso ps.HasExited = False Then
ps.StandardInput.Write(cmd + vbLf)
'MessageBox.Show(ps.StandardOutput.ReadToEndAsync.ToString())
Return True
Else
Return False
End If
Catch ex As Exception
Return False
End Try
End Function
Public Sub Playsong(ByVal Songfilelocation As String)
Try
ps.Kill()
Catch
End Try
Try
ps.StartInfo.Arguments = args + " """ + Songfilelocation + """"
ps.Start()
SendCommand("set_property volume " + "80")
Catch e As Exception
MessageBox.Show(e.Message)
End Try
End Sub
Private Sub lstResults_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstResults.SelectedIndexChanged
Playsong(lstResults.SelectedItem.ToString())
End Sub
Private Sub btnPlayJPG_Click(sender As Object, e As EventArgs) Handles btnPlayJPG.Click
Try
' jpgPs.Kill()
Catch
End Try
Try
'ps.StartInfo.Arguments = "–fs –mf fps=5 mf://d:/music/g1/Image00020.jpg –loop 200" '-vo gl_nosw
'jpgPs.Start()
Shell("d:\Music\playjpg.bat")
' SendCommand("set_property volume " + "80")
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
Private Sub btnPlayPause_Click(sender As Object, e As EventArgs) Handles btnPlayPause.Click
SendCommand("pause")
End Sub
Private Sub btnMute_Click(sender As Object, e As EventArgs) Handles btnMute.Click
SendCommand("mute")
End Sub
Private Sub btnKaraoke_Click(sender As Object, e As EventArgs) Handles btnKaraoke.Click
'SendCommand("panscan 0-0 | 1-1")
SendCommand("af_add pan=2:1:1:0:0")
End Sub
Private Sub btnStereo_Click(sender As Object, e As EventArgs) Handles btnStereo.Click
SendCommand("af_add pan=2:0:0:1:1")
End Sub
Private Sub btnStop_Click(sender As Object, e As EventArgs) Handles btnStop.Click
Playsong("d:\music\iot.mp4")
End Sub
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
'SendCommand("loadfile d:\music\iot.mp4")
'SendCommand("pt_step 1")
End Sub
End Class
When adding a data to an array I keep getting the error 'System.IndexOutOfRangeException' the Array is declared to bound of 200 and at the data I'm trying to add is at 6 + 1, 6 is the variable count, in the code.
Public Class FormEvents
Dim ArrayEvents(200) As String
Dim Count As Integer
Private Sub FormEvents_Load(sender As Object, e As EventArgs) Handles MyBase.Load
Dim Events As String = "C:\Users\Andrew prince\Desktop\Education\College\Computing\Controlled assesment\Program\Program files\Events.txt"
Dim ObjReader As New StreamReader(Events)
ArrayEvents = ObjReader.ReadLine().Split(",")
UpdateInfo()
ObjReader.Close()
TxtEventNo.Enabled = False
BtnAdd.Enabled = False
End Sub
Sub UpdateInfo()
TxtEventNo.Text = ArrayEvents(Count)
TxtEventType.Text = ArrayEvents(Count + 1)
TxtEventDistance.Text = ArrayEvents(Count + 2)
End Sub
Private Sub BtnNext_Click(sender As Object, e As EventArgs) Handles BtnNext.Click
Count = Count + 3
checkInfo()
End Sub
Private Sub BtnPrev_Click(sender As Object, e As EventArgs) Handles BtnPrev.Click
Count = Count - 3
checkInfo()
End Sub
Sub Createvent()
Dim eventNo As String
eventNo = Count / 3
TxtEventNo.Text = eventNo
TxtEventDistance.Text = ""
TxtEventType.Text = ""
BtnNext.Enabled = False
BtnPrev.Enabled = False
BtnAdd.Enabled = True
End Sub
Sub checkInfo()
If Count <= 0 Then Count = 0
If ArrayEvents(Count) = "" Then Createvent() Else UpdateInfo()
End Sub
Private Sub BtnAdd_Click(sender As Object, e As EventArgs) Handles BtnAdd.Click
If TxtEventDistance.Text.Length > 0 And TxtEventType.Text.Length > 0 Then AddToArray()
End Sub
Sub AddToArray()
ArrayEvents(Count) = TxtEventNo.Text
ArrayEvents(Count + 1) = TxtEventType.Text 'error occurs here in the code
ArrayEvents(Count + 2) = TxtEventDistance.Text
Enable()
End Sub
Sub Enable()
BtnAdd.Enabled = False
BtnNext.Enabled = True
BtnPrev.Enabled = True
End Sub
End Class
ArrayEvents is probably no longer 200 in length after you set it in the load method to:
ArrayEvents = ObjReader.ReadLine().Split(",")
I am trying to build a 15 number shuffle game in VB.
Later on, I will have to submit the 15 pieces to a full image.
At the mintime, I tries to build it with numbers. it was all working fine until I got this messege:
Conversion from string "" to type 'Double' is not valid.
I got it in line:
If butt2.Content = "" Then
here is my code:
<pre lang="vb">Class MainWindow
Private Sub btn1_Click(sender As Object, e As RoutedEventArgs) Handles btn1.Click
'2,4
checkBtn(btn1, btn4)
checkBtn(btn1, btn2)
chechSolved()
End Sub
Private Sub btn2_Click(sender As Object, e As RoutedEventArgs) Handles btn2.Click
'1,3,5
checkBtn(btn2, btn1)
checkBtn(btn2, btn3)
checkBtn(btn2, btn5)
chechSolved()
End Sub
Private Sub btn3_Click(sender As Object, e As RoutedEventArgs) Handles btn3.Click
'2,6
checkBtn(btn3, btn2)
checkBtn(btn3, btn6)
chechSolved()
End Sub
Private Sub btn4_Click(sender As Object, e As RoutedEventArgs) Handles btn4.Click
'1,5,7
checkBtn(btn4, btn1)
checkBtn(btn4, btn5)
checkBtn(btn4, btn7)
chechSolved()
End Sub
Private Sub btn5_Click(sender As Object, e As RoutedEventArgs) Handles btn5.Click
'2,4,6,8
checkBtn(btn5, btn2)
checkBtn(btn5, btn4)
checkBtn(btn5, btn6)
checkBtn(btn5, btn8)
chechSolved()
End Sub
Private Sub btn6_Click(sender As Object, e As RoutedEventArgs) Handles btn6.Click
'3,5,9
checkBtn(btn6, btn3)
checkBtn(btn6, btn5)
checkBtn(btn6, btn9)
chechSolved()
End Sub
Private Sub btn7_Click(sender As Object, e As RoutedEventArgs) Handles btn7.Click
'4,8
checkBtn(btn7, btn4)
checkBtn(btn7, btn8)
chechSolved()
End Sub
Private Sub btn8_Click(sender As Object, e As RoutedEventArgs) Handles btn8.Click
'5,7,9
checkBtn(btn8, btn5)
checkBtn(btn8, btn7)
checkBtn(btn8, btn9)
chechSolved()
End Sub
Private Sub btn9_Click(sender As Object, e As RoutedEventArgs) Handles btn9.Click
'6,8
checkBtn(btn9, btn6)
checkBtn(btn9, btn8)
chechSolved()
End Sub
Sub checkBtn(ByVal butt1 As Button, ByVal butt2 As Button)
If butt2.Content = "" Then
butt2.Content = butt1.Content
butt1.Content = ""
End If
End Sub
Sub chechSolved()
If btn1.Content = "1" And btn2.Content = "2" And btn3.Content = "3" And btn4.Content = "4" And btn5.Content = "5" And btn6.Content = "6" And btn7.Content = "7" And btn8.Content = "8" And btn9.Content = "" Then
MsgBox("הצלחת")
End If
End Sub
Sub shuffle()
Dim a(8), i, j, RN As Integer
Dim flag As Boolean
flag = False
i = 1
a(j) = 1
Do While i <= 8
Randomize()
RN = CInt(Int((8 * Rnd()) + 1))
For j = 1 To i
If (a(j) = RN) Then
flag = True
Exit For
End If
Next
If flag = True Then
flag = False
Else
a(i) = RN
i = i + 1
End If
Loop
btn1.Content = a(1)
btn2.Content = a(2)
btn3.Content = a(3)
btn4.Content = a(4)
btn5.Content = a(5)
btn6.Content = a(6)
btn7.Content = a(7)
btn8.Content = a(8)
btn9.Content = ""
End Sub
Private Sub btnSH_Click(sender As Object, e As RoutedEventArgs) Handles btnSH.Click
shuffle()
End Sub
End Class</pre>
it would help a lot if you look at it.
The compiler might be having a problem comparing the string to the btn.Content because you set the Content to an Integer type (btn1.Content = a(1))
The following is the code which I am using for creating a two dimensional array
Public Class frmGrades
Private Score As Dictionary(Of String, String) = New Dictionary(Of String, String)
Private Sub cmdApply_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdApply.Click
Static intNumber As Integer
ReDim Preserve Score(1, intNumber)
Score(0, intNumber) = txtStudent.Text
Score(1, intNumber) = txtGrade.Text
hsbStudent.Maximum = intNumber
hsbStudent.Value = intNumber
intNumber = intNumber + 1
txtGrade.Clear()
txtStudent.Clear()
txtStudent.Focus()
End Sub
Private Sub hsbStudent_Scroll(ByVal sender As Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles hsbStudent.Scroll
txtStudent.Text = Score(0, hsbStudent.Value)
txtGrade.Text = Score(1, hsbStudent.Value)
End Sub
Private Sub cmdFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdFirst.Click
txtStudent.Text = Score(0, hsbStudent.Minimum)
txtGrade.Text = Score(1, hsbStudent.Minimum)
End Sub
Private Sub cmdLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdLast.Click
txtStudent.Text = Score(0, hsbStudent.Maximum)
txtGrade.Text = Score(1, hsbStudent.Maximum)
End Sub
**Private Sub CmdEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdEdit.Click
If Score.ContainsKey(txtStudent.Text) Then
Score.Item(txtStudent.Text) = txtGrade.Text
Else
Score.Add(txtStudent.Text, txtGrade.Text)
End If
End Sub
End Class**
Now I would like to edit the grade text box which should also change the grade in the array. Any idea on how could this be done.
UPDATE:
OK, I see the code has a little more now and the problem is more clear as well as the need for a different approach. I rewrote your code. See if this works for you:
Public Class frmGrades
Public Class StudentGrade
Public Name As String
Public Grade As String
End Class
Private Score As List(Of StudentGrade) = New List(Of StudentGrade)
Private Sub cmdApply_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdApply.Click
AddStudent()
End Sub
Private Sub hsbStudent_Scroll(ByVal sender As Object, ByVal e As System.Windows.Forms.ScrollEventArgs) Handles hsbStudent.Scroll
Update(hsbStudent.Value - 1) 'lists are zero-based
End Sub
Private Sub cmdFirst_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdFirst.Click
Update(0)
End Sub
Private Sub cmdLast_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdLast.Click
Update(hsbStudent.Maximum - 1)
End Sub
Private Sub AddStudent()
Dim nm As New StudentGrade
nm.Name = txtStudent.Text
nm.Grade = txtGrade.Text
Score.Add(nm)
hsbStudent.Minimum = 1
hsbStudent.Maximum = Score.Count
hsbStudent.Value = Score.Count
txtGrade.Clear()
txtStudent.Clear()
txtStudent.Focus()
End Sub
Private Sub Update(i As Integer)
txtStudent.Text = Score(i).Name
txtGrade.Text = Score(i).Grade
End Sub
Private Sub CmdEdit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmdEdit.Click
Dim index As Integer = -1, cnt As Integer = 0
For Each nm As StudentGrade In Score
If nm.Name.ToLower = txtStudent.Text.ToLower Then
index = cnt
Exit For
End If
cnt += 1
Next
If index = -1 Then
AddStudent()
Else
Score(index).Name = txtStudent.Text
Score(index).Grade = txtGrade.Text
hsbStudent.Value = index + 1
End If
End Sub
End Class
With this code you can expand the class StudentGrade to contain whatever you need to store. The list, contrary to dictionary, allow you to use index values as well.