I have a ListBox in winform which displays records on the textbox in the listbox click event. but when saving the records it will save only the last edited record. ie a list box with usernames populated from database. when click on each username it will display the userdetails like firstname,lastname etc on the corresponding textboxes. I want to edit all the userdetails in one shot and finally to update the records on update button click event. How can I do that?
Without writing the full code for you, it's difficult to say what changes you need to make to what you already have. A couple of questions to start with are:-
1) How are you accessing your database for read and write processes?
2) How are you populating your listbox - is this just a string or is this a username class that you have defined elsewhere?
It may be best to post what you already have so that we can see better what you need.
I have posted my code. I want to save the records in one shot after updating all the user details.
Imports System.Configuration
Public Class frmUsers
Private Enum Modesection
READ_MODE = 0
APPEND_MODE = 1
UPDATE_MODE = 2
End Enum
Dim app_Mode As Modesection
Dim errorLog As New ErrorLog
Dim LoadedStatus As Boolean = False
Dim blnChange As Boolean = False
Private Sub LoadUsers()
Try
Dim objDA As New PS_DA.PSDA(ConfigurationSettings.AppSettings("Server1").ToString)
Dim dtTableUsers As DataTable
dtTableUsers = objDA.getUsers
lstUsers.DataSource = dtTableUsers
lstUsers.DisplayMember = "UserName"
lstUsers.ValueMember = "UserID"
lstUsers.SelectedIndex = 0
Catch ex As Exception
errorLog.WriteErrorLog("frmSUsers: LoadUsers ", ex.Message)
End Try
End Sub
Private Sub frmUsers_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Try
LoadUsers()
app_Mode = Modesection.READ_MODE
LoadedStatus = True
Catch ex As Exception
errorLog.WriteErrorLog("frmUsers: frmUsers_Load ", ex.Message)
End Try
End Sub
Private Sub lstUsers_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstUsers.Click
Try
If lstUsers.SelectedValue = 0 Then
app_Mode = Modesection.APPEND_MODE
RefreshControls()
Else
app_Mode = Modesection.UPDATE_MODE
LoadUserDetails(lstUsers.SelectedValue)
End If
Catch ex As Exception
errorLog.WriteErrorLog("frmUsers: lstUsers_Click ", ex.Message)
End Try
End Sub
Private Sub lstUsers_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstUsers.SelectedIndexChanged
If LoadedStatus Then
Dim strName(4) As String
strName(0) = txtFirstName.Text
strName(1) = txtFamilyName.Text
strName(2) = txtMobile1.Text
strName(3) = txtMobile2.Text
End If
End Sub
Public Structure Users
Public FirstName As String
Public FamilyName As String
Public Mobile1 As String
End Structure
Private Sub RefreshControls()
Try
txtFamilyName.Text = ""
txtFirstName.Text = ""
txtMobile1.Text = ""
txtMobile2.Text = ""
Catch ex As Exception
errorLog.WriteErrorLog("frmUsers: RefreshControls ", ex.Message)
End Try
End Sub
Private Sub LoadUserDetails(ByVal userId As Integer)
Dim objDA As New PS_DA.PSDA(ConfigurationSettings.AppSettings("Server1").ToString)
Dim dtTableUsers As DataTable
Try
dtTableUsers = objDA.getUserDetails(userId)
If IsNothing(dtTableUsers) = False Then
txtFirstName.Text = dtTableUsers.Rows(0)("FirstName")
txtFamilyName.Text = dtTableUsers.Rows(0)("FamilyName")
txtMobile1.Text = IIf(IsDBNull(dtTableUsers.Rows(0)("Mobile1")), "", dtTableUsers.Rows(0)("Mobile1"))
txtMobile2.Text = IIf(IsDBNull(dtTableUsers.Rows(0)("Mobile2")), "", dtTableUsers.Rows(0)("Mobile2"))
chkSendMobile1.Checked = Convert.ToBoolean(dtTableUsers.Rows(0)("send_to_mobile1"))
End If
Catch ex As Exception
errorLog.WriteErrorLog("frmUsers: LoadUserDetails ", ex.Message)
End Try
End Sub
Private Sub lstUsers_SelectedValueChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles lstUsers.SelectedValueChanged
End Sub
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
If txtFirstName.Text.Trim = "" Then
infomsg = New popupmsg("First Name cannot be blank", 0, 0)
infomsg.Show()
txtFirstName.Focus()
Exit Sub
ElseIf txtFamilyName.Text.Trim = "" Then
infomsg = New popupmsg("Family Name cannot be blank", 0, 0)
infomsg.Show()
txtFamilyName.Focus()
Exit Sub
ElseIf chkSendMobile1.Checked = True And txtMobile1.Text.Trim = "" Then
infomsg = New popupmsg("Mobile 1 cannot be blank", 0, 0)
infomsg.Show()
txtMobile1.Focus()
Exit Sub
ElseIf chkSendmobile2.Checked = True And txtMobile2.Text.Trim = "" Then
infomsg = New popupmsg("Mobile 2 cannot be blank", 0, 0)
infomsg.Show()
txtMobile2.Focus()
Exit Sub
End If
If txtMobile1.Text.Trim <> "" And IsNumeric(txtMobile1.Text) = False Then
infomsg = New popupmsg("Mobile 1 cannot be a non numeric", 0, 0)
infomsg.Show()
txtMobile1.Focus()
Exit Sub
End If
Try
Dim objDA As New PS_DA.PSDA(ConfigurationSettings.AppSettings("Server1").ToString)
If app_Mode = Modesection.APPEND_MODE Then
If objDA.SaveNewSMSUser(txtFirstName.Text.Replace("'", "''"), txtFamilyName.Text.Replace("'", "''"), txtMobile1.Text.Replace("'", "''"), chkSendMobile1.Checked) Then
infomsg = New popupmsg("Successfully saved", 0, 0)
infomsg.Show()
Me.Close()
End If
ElseIf app_Mode = Modesection.UPDATE_MODE Then
If objDA.UpdateSMSUser(txtFirstName.Text.Replace("'", "''"), txtFamilyName.Text.Replace("'", "''"), txtMobile1.Text, chkSendMobile1.Checked, lstUsers.SelectedValue) Then
infomsg = New popupmsg("Successfully saved", 0, 0)
infomsg.Show()
Me.Close()
End If
End If
Catch ex As Exception
errorLog.WriteErrorLog("frmUsers : btnSave_Click ", ex.Message)
End Try
End Sub
Private Sub btnClose_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClose.Click
Me.Close()
End Sub
End Class
You don't need any code to display the data for editing. Just use a data adapter populate your DataTable and bind it to the ListBox and the TextBoxes. When the user selects a record in the ListBox its fields will be displayed in the ListBox automatically. When you're done use the same data adapter to save the changes from the DataTable back to the database. Generally things like this don't work because people over-complicate them.
Private adapter As SqlDataAdapter
Private table As DataTable
Private Sub Load()
adapter.Fill(table)
With ListBox1
.DisplayMember = "Name"
.ValueMember = "ID"
.DataSource = table
End With
TextBox1.DataBindings.Add("Text", table, "Description")
End Sub
Private Sub Save()
adapter.Update(table)
End Sub
There are a few details to flesh out there but that's basically how it works.
I have changed the code to store user details into an array. but this is not working. when I select second user first user details edited disappears. I want to store the updated user details into an array and finally save the details. please Help.
Public Structure Users
Public FirstName As String
Public FamilyName As String
Public Mobile1 As String
End Structure
Private Sub lstUsers_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lstUsers.Click
Try
If lstUsers.SelectedValue = 0 Then
app_Mode = Modesection.CREATE
RefreshControls()
Else
app_Mode = Modesection.UPDATE
LoadUserDetails(lstUsers.SelectedValue)
Dim Entry As New Users()
Dim intIndex As Integer
Dim i As Integer
intIndex = CountUserDetails(lstUsers.SelectedValue)
For i = 0 To intIndex - 1
I cannot recommend strongly enough that that you abandon that code altogether and use data-binding. If you're determined to go that way though, you should be handling the SelectedIndexChanged event, not the Click event.
By the way, your Try...Catch block is very bad. If you're not going to do anything other than rethrow the exception in the Catch block then it's pointless and yours is worse than pointless because you're also removing the entire stack trace. If you do want to rethrow an exception, which you should only do after processing it in some way, then you just use the Throw keyword alone, without specifying the exception. What exactly are you trying to achieve with that anyway? The app is still going to crash if the rethrown exception is not caught somewhere else and you're not logging the issue in any way so what use is it?
The code is not working in ListBox click event and selectedindexchanged event. I can get the modified value only in the textbox textchanged event. i want to add the modified records for each user to array and save the records. pls Help.
You can get the modified values any time you like. They are sitting there in the TextBoxes, waiting for you to get them. When the user selects another record the SelectedIndexChanged event is raised. At that point, you can get the data from the TextBoxes and update the previously displayed record, then display the currently selected record. That means that you will need to store a reference to the previously selected record, or perhaps just its index, so that you can access it once it's deselected. When a record is selected you store its index in a variable. When another record is selected, you use that variable to access the previous record, then store the index of the new record.
Of course, you could just use data-binding. That way none of this messing about would be required.
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