Private Sub GridViewLog_StartSorting(ByVal sender As Object, ByVal e As EventArgs) Handles GridViewLog.StartSorting
SetDefaultSort()
End Sub
Private Sub SetDefaultSort()
Dim col1 As DevExpress.XtraGrid.Columns.GridColumn
Dim col2 As DevExpress.XtraGrid.Columns.GridColumn
Dim sortIndex As Integer
Dim order As DevExpress.Data.ColumnSortOrder
Try
col1 = GridViewLog.Columns("Date_Field")
col2 = GridViewLog.Columns("Time_Field")
If Not ((GridViewLog.SortedColumns.Contains(col1) OrElse GridViewLog.GroupedColumns.Contains(col1)) AndAlso (GridViewLog.SortedColumns.Contains(col2) OrElse GridViewLog.GroupedColumns.Contains(col2))) Then
Me.GridViewLog.BeginSort()
If col1.SortOrder = DevExpress.Data.ColumnSortOrder.None Then
order = col2.SortOrder
Else
order = col1.SortOrder
End If
If order = DevExpress.Data.ColumnSortOrder.None Then
order = DevExpress.Data.ColumnSortOrder.Descending
End If
sortIndex = GridViewLog.SortedColumns.Count
Me.GridViewLog.Columns("Date_Field").SortIndex = sortIndex - 1
Me.GridViewLog.Columns("Date_Field").SortOrder = order
Me.GridViewLog.Columns("Time_Field").SortIndex = sortIndex
Me.GridViewLog.Columns("Time_Field").SortOrder = order
Me.GridViewLog.EndSort()
End If
Catch ex As Exception
End Try
End Sub
Changed some times to 10:31 and they didn't re-sort. I then hit Time at the top of the column and it still didn’t change. Please check the attached screenshot
I think there are two options:
Set the columns' SortMode property to ColumnSortMode.Value
Use CustomColumnSort event and set the columns' SortMode property to ColumnSortMode.Custom
Related
I need to add a self-incrementing column to a DataGridView. Every time a row is added to the grid I want to increment the No column.
My Form_Load code:
Private Sub SAP_OrdenVenta_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
DataGridView1.ColumnCount = 6
DataGridView1.Columns(0).Name = ("No")
DataGridView1.Columns(1).Name = ("NoArticulo")
DataGridView1.Columns(2).Name = ("Descripcion")
DataGridView1.Columns(3).Name = ("Cantidad")
DataGridView1.Columns(4).Name = ("Precio")
DataGridView1.Columns(5).Name = ("Total")
End Sub
The DataGridView Button Click event for the add button:
Private Sub btnAgregar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAgregar.Click
Dim articulo, cantidad As Integer
Dim precio, total1 As Double
Dim i As Integer = 0
articulo = txtArticulo.Text.Trim()
cantidad = txtCantidad.Text.Trim()
precio = txtPrecio.Text.Trim()
total1 = txtPrecio.Text.Trim()
'Agrego Linea a DataGridView
Dim row As String() = New String() {1, articulo, "No disponible", cantidad, precio, total1}
DataGridView1.Rows.Add(row)
End Sub
How can I make this work?
Private Sub btnAgregar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAgregar.Click
Dim LastIndex As Integer = DataGridView1.Rows.Count - 1
Dim LastNo As Integer = Integer.Parse(DataGridView1.Rows(LastIndex).Cells(0).Value)
Dim NewNo As String = (LastNo + 1).ToString()
Dim row As String() = New String() {NewNo, txtArticulo.Text, "No disponible", txtCantidad.Text, txtPrecio.Text, txtPrecio.Text}
DataGridView1.Rows.Add(row)
End Sub
Take note, however: if this view is loaded from a real database table, you almost always want to rely on your database's ability to generate ID values. Otherwise, this is a huge race condition waiting to blow up.
I have a dropdown list which is inside a user control on my page.
When I select an item in a gridview it fills some data including this dropdown list selecting the correspondent value to the gridview row.
Then I can change the selection, but when i try to do that the Selected Index Changed event isn't firing. At least not at first. If i select again it fires.
I'm using asp.net with VB.
I have put AutoPostback = true, I've set the Handles in the codebehind method, I've set a default empty line and set it to default selection, but I can't get it to work.
Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
If Page.IsPostBack() Then
fillProd()
Dim cert As String = Session("var")
isFilled = Session("isFilled")
If Not IsNothing(cert) And Not isFilled Then
FillFields(cert)
End If
End If
End Sub
Private Sub fillProd()
dt = HttpContext.Current.Session("dt")
Dim row() As DataRow = dt.Select()
Dim dtProductos As New DataTable()
dtProductos.Columns.Add(New DataColumn("valorcombo", GetType(String)))
dtProductos.Columns.Add(New DataColumn("textocombo", GetType(String)))
Dim firstrow As DataRow = dtProductos.NewRow()
firstrow (0) = 0
firstrow (1) = ""
dtProductos.Rows.Add(firstrow)
For i As Integer = 0 To row.Length - 1
Dim fila As DataRow = dtProductos.NewRow()
fila(0) = row(i)("cod")
fila(1) = row(i)("text")
dtProductos.Rows.Add(fila)
Next
ddlproductos.DataSource = dtProductos
ddlproductos.DataTextField = "textocombo"
ddlproductos.DataValueField = "valorcombo"
ddlproductos.DataBind()
ddlproductos.SelectedIndex = 0
End Sub
Private Sub FillFields(cert As String)
Dim dtSubsData As DataTable = GetData(cert)
If Not IsNothing(dtSubsData) Then
Dim row As DataRow = dtSubsData.Rows(0)
ddlproductos.ClearSelection()
ddlproductos.SelectedValue = row("cod").ToString()
Session("isFilled") = True
isFilled = Session("isFilled")
End If
End Sub
Can anyone help?
I am new to asp.net and vb.net programming and i can't find a answer to my problem. I have dynamically generated checkboxes in a loop at runtime within a sub.
This is a grid scheduler program that displays selected day's and selected hours from a location which is selected from a different page. I want to acces the checkboxes by id but i cant get acces to them because the checkboxes are not declared at class level.
Can anyone help me please, i have searched all day long for a solution. I Prefer VB but C# is fine also.
Below is my codebehind
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
BindLocationDayTime()
End If
End Sub
Public Sub BindLocationDayTime()
Dim ID As Integer
Dim Name As String
Dim Day As Integer
Dim Time As Integer
Dim StartDate As DateTime
Dim EndDate As DateTime
Dim Locations As SqlDataReader = GetLocations()
For Each Item In Locations
Dim LRow As New TableRow()
Dim LCell As New TableCell()
LCell.Text = Locations.Item("Name")
LCell.Attributes.Add("class", "LocationHeader")
LCell.Attributes.Add("colspan", "5")
LRow.Cells.Add(LCell)
LocationData.Rows.Add(LRow)
Dim Location As SqlDataReader = GetLocation(Convert.ToInt32(Locations.Item("Id")))
While Location.Read()
Name = Location("Name").ToString()
StartDate = Location("StartDate")
EndDate = Location("EndDate")
End While
Dim dtfi As Globalization.DateTimeFormatInfo = Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat
Dim tRowCount As Integer = 0
Do While StartDate <= EndDate
Dim LocationDayTime As SqlDataReader = GetPlayDayTime(Convert.ToInt32(Locations.Item("Id")))
For Each row In LocationDayTime
Day = LocationDayTime.Item("DayID")
Time = LocationDayTime.Item("TimeID")
ID = Locations.Item("Id")
If Day = 1 Then
If StartDate.DayOfWeek = DayOfWeek.Monday Then
BindDays(StartDate, ID, tRowCount, Time)
tRowCount = tRowCount + 1
End If
ElseIf Day = 2 Then
If StartDate.DayOfWeek = DayOfWeek.Tuesday Then
BindDays(StartDate, ID, tRowCount, Time)
tRowCount = tRowCount + 1
End If
ElseIf Day = 3 Then
If StartDate.DayOfWeek = DayOfWeek.Wednesday Then
BindDays(StartDate, ID, tRowCount, Time)
tRowCount = tRowCount + 1
End If
ElseIf Day = 4 Then
If StartDate.DayOfWeek = DayOfWeek.Thursday Then
BindDays(StartDate, ID, tRowCount, Time)
tRowCount = tRowCount + 1
End If
ElseIf Day = 5 Then
If StartDate.DayOfWeek = DayOfWeek.Friday Then
BindDays(StartDate, ID, tRowCount, Time)
tRowCount = tRowCount + 1
End If
End If
Next
StartDate = StartDate.AddDays(1)
Loop
Next
End Sub
Public Sub BindDays(ByVal StartDate As DateTime, ByVal ID As Integer, ByVal tRowCount As Integer, ByVal Time As Integer)
Dim dtfi As Globalization.DateTimeFormatInfo = Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat
Dim tRow As New TableRow()
Dim Cell1 As New TableCell()
Dim strDayOfWeek As String = dtfi.GetDayName(StartDate.DayOfWeek)
Cell1.Text = UppercaseFirstLetter(strDayOfWeek & " ") & (StartDate.Date.ToShortDateString & " om ") & (Time & "uur ")
Cell1.Attributes.Add("class", "MemberCell")
tRow.Cells.Add(Cell1)
Dim Cell2 As New TableCell()
Dim cbAvailible As New CheckBox()
cbAvailible.ID = (StartDate.Date) & "," & (Time)
cbAvailible.Checked = False
Cell2.Controls.Add(cbAvailible)
tRow.Cells.Add(Cell2)
Dim Cell3 As New TableCell()
Dim Label As New Label()
Label.Text = ("(Op deze datum ben ik verhinderd)")
Cell3.Controls.Add(Label)
tRow.Cells.Add(Cell3)
If tRowCount Mod 2 Then
tRow.Attributes.Add("class", "alternatingItemStyle")
Else
tRow.Attributes.Add("class", "itemStyle")
End If
LocationData.Rows.Add(tRow)
End Sub
#End Region
#Region " Events "
Private Sub Insert_Click(sender As Object, e As EventArgs) Handles Insert.Click
' I want to get here al the checkbox id and insert the values to a databse
End Sub
End Region
Solution 1 - Using recursive control search
I have done something similar with a dynamically generated form with a variable number of controls (textboxes, dropdowns, and checkboxes) and control state being data driven. I would not be looking to tie into the events of the generated controls (would require a jerky postback) but have a "Save" button and from that event do a recursive GetChildControls function that starts from the container holding your dynamic controls. Have a convention when assigning an id for each dynamic control so when you later loop back through them you can know which control is related to which record.
The recursive function:
Public Class ControlUtils
Shared Function GetChildControls(ByVal ctrl As Control, Optional ByVal ctrlType As Type = Nothing) As Control()
Dim controls As New ArrayList()
For Each c As Control In ctrl.Controls
' add this control and all its nested controls
If ctrlType Is Nothing OrElse ctrlType.IsAssignableFrom(c.GetType()) Then
controls.Add(c)
controls.AddRange(GetChildControls(c))
End If
Next
' return the result as an array of Controls
Return DirectCast(controls.ToArray(GetType(Control)), Control())
End Function
End Class
Basic idea with a contrived dynamic form...
A class to represent the database info:
Public Class Location
Public Property ID As Integer
Public Property Name As String
Public Property StartDate As Date
Public Property EndDate As Date
Shared Function GetSampleLocations() As List(Of Location)
Dim sample As New List(Of Location)
Dim loc As Location
For j = 1 To 5
loc = New Location
loc.ID = j
loc.Name = "Location " & j
loc.StartDate = Date.Today
loc.EndDate = Date.Today.AddDays(6 - j)
sample.Add(loc)
Next
Return sample
End Function
End Class
The class that has the methods to build the "form" and save its data:
Public Class LocationsDynamicForm
Dim _Locations As IEnumerable(Of Location)
Sub New(locations As IEnumerable(Of Location))
_Locations = locations
End Sub
Sub InsertEditForm(plc As PlaceHolder, setUserInput As Boolean)
'build and add controls to placeholder
Dim tbl As New Table
Dim r As TableRow
Dim c As TableCell
For Each loc As Location In _Locations
r = New TableRow
'add cell for location name
c = New TableCell
c.Controls.Add(New LiteralControl(loc.Name)) 'add plain text through literal control
r.Cells.Add(c)
'add cell for each day in the date range for current location
Dim currentDate As Date = loc.StartDate
Do Until currentDate > loc.EndDate
c = New TableCell
Dim chk As New CheckBox
chk.ID = "chkLocationDate_" & loc.ID & "_" & currentDate.Ticks
chk.Text = currentDate.ToShortDateString
If setUserInput Then
'set the check state based on current database value
Dim pretendValueCameFromDB As Boolean = True
chk.Checked = pretendValueCameFromDB
End If
c.Controls.Add(chk)
r.Cells.Add(c)
currentDate = currentDate.AddDays(1)
Loop
tbl.Rows.Add(r)
Next
plc.Controls.Add(tbl)
End Sub
Sub SaveForm(ByVal plc As PlaceHolder)
Dim ctl As Control
Dim controlIDParts() As String
Dim drp As DropDownList
Dim txt As TextBox
Dim chk As CheckBox
For Each ctl In ControlUtils.GetChildControls(plc, GetType(Control))
If ctl.GetType Is GetType(DropDownList) Then
drp = CType(ctl, DropDownList)
If drp.ID Like "drpIT_*" Then
controlIDParts = drp.ID.Split("_")
'update record...
End If
ElseIf ctl.GetType Is GetType(TextBox) Then
txt = CType(ctl, TextBox)
If txt.ID Like "txtIT_*" Then
controlIDParts = txt.ID.Split("_")
'update record...
End If
ElseIf ctl.GetType Is GetType(CheckBox) Then
chk = CType(ctl, CheckBox)
If chk.ID Like "chkLocationDate_*" Then
controlIDParts = chk.ID.Split("_")
Dim locationID = controlIDParts(1)
Dim ticks As Long = Val(controlIDParts(2))
Dim d As New Date(ticks)
'update record...
End If
End If
Next
'commit record changes...
End Sub
End Class
And its use inside the webform (assuming you have a save button and placeholder control):
Dim _Locations As List(Of Location)
Dim _LocationsForm As LocationsDynamicForm
Protected Sub Page_Init(sender As Object, e As EventArgs) Handles Me.Init
_Locations = Location.GetSampleLocations()
_LocationsForm = New LocationsDynamicForm(_Locations)
_LocationsForm.InsertEditForm(plcLocations, Not Me.IsPostBack)
End Sub
Protected Sub btnSave_Click(sender As Object, e As EventArgs) Handles btnSave.Click
_LocationsForm.SaveForm(plcLocations)
End Sub
Solution 2 - Use AddHandler with Dynamically added controls
This is closer to what you want, but requires a postback on each checkbox change. In your BindDays routine add these lines when you are adding the checkbox.
cbAvailible.AutoPostBack = True
AddHandler cbAvailible.CheckedChanged, AddressOf Insert_Click
You should trim the Handles keyword at the end of your sub Insert_Click signature. The Handles is nice when you have foreknowledge of the control(s) you will be handling but the controls don't exist at design time.
Private Sub Insert_Click(sender As Object, e As EventArgs)
' I want to get here al the checkbox id and insert the values to a databse
Dim chk As CheckBox = CType(sender, CheckBox)
Label1.Text = "ID = " & chk.ID & ", Checked = " & chk.Checked
End Sub
I'm not sure how you are persisting your 'LocationData' across postbacks or adding it to the web page but I was able to get a modified version of your code working.
' Global declaration inside the "Form" class.
Public Checkboxes as New List(of Checkbox)
Each time you create a "new checkbox" add it to the collection.
...
Dim cbAvailible As New CheckBox()
Checkboxes.Add(cbAvailable)
...
Later you can simply refer to the checkbox by Index.
Dim chk as boolean = Checkboxes(2).checked ' example
The other Alternative is to use a Generic.Dictionary to store the checkboxes, in that case each box can have a "Key" like a string that relates to the row or something specific.
Looping through Checkboxes.
For iQ AS integer = 0 to Checkboxes.Count -1
Dim cb as checkbox = Checkboxes(iq) ' just a way to not use long name during operations.
Dim checked as boolean = cb.checked ' ... ' do your work here
' ...
Next iQ
Odds are you will need to do the same with all your objects (per row).
The Last Index should be the same for all of them. Which should be the same as the number of rows in your table object as well.
I am adding multiple controls dynamically based on a dropdownlist that the user selects. i.e. if the user selects 3 then 3 sets of the controls are added. My problem is not in adding the controls, I can add them fine, I haven't added all my code but the main parts to understand what I am doing.
Once the controls have been created, the relevant info is captured. On the Update click I need to access the values of these dynamic controls by looping through in the correct order and retrieve the values and write to the database. I can't seem to access them correctly.
Hopefully I am making sense. Any help would be appreciated. Thanks
''Loop through first set of controls and get values and then the next set etc..
Dim Description as string = ''Get Textbox value
Dim Type as string = ''Get RadComboBox value
Dim XFieldName as string = ''Get RadComboBox value
Dim Colour as string = ''Get RadColorPicker value
Below is my Code:
VB
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
RecreateControlsTxt("txt", "TextBox")
RecreateControlsChart("comboChart", "RadComboBox")
RecreateControls("combo", "RadComboBox")
RecreateControlsCP("cp", "RadColorPicker")
End Sub
Protected Sub AddControls_Click(sender As Object, e As EventArgs) Handles AddControls.Click
For i As Integer = 0 To ddlFieldNames.SelectedIndex
CreateTextbox("txt-" & Convert.ToString(i + 1))
Next
For i As Integer = 0 To ddlFieldNames.SelectedIndex
CreateComboChart("comboChart-" & Convert.ToString(i + 1))
Next
For i As Integer = 0 To ddlFieldNames.SelectedIndex
CreateComboField("combo-" & Convert.ToString(i + 1))
Next
For i As Integer = 0 To ddlFieldNames.SelectedIndex
CreateColourPicker("cp-" & Convert.ToString(i + 1))
Next
End Sub
Private Sub CreateTextbox(ByVal ID As String)
Dim txt As New TextBox()
txt.ID = ID
txt.Height = 20
Me.divDesc.Controls.Add(txt)
End Sub
Private Sub CreateComboField(ByVal ID As String)
Dim combo As New RadComboBox()
combo.ID = ID
combo.DataSource = Me.odsChartsSeriesField
combo.DataTextField = "FieldNames"
combo.DataValueField = "FieldNames"
combo.DataBind()
Me.divField.Controls.Add(combo)
End Sub
Private Sub CreateComboChart(ByVal ID As String)
Dim comboChart As New RadComboBox()
comboChart.ID = ID
Dim item1 As New RadComboBoxItem()
item1.Text = "Line"
item1.Value = "smoothedLine"
item1.ImageUrl = ("Images/linechart.png")
comboChart.Items.Add(item1)
Dim item2 As New RadComboBoxItem()
item2.Text = "Column"
item2.Value = "column"
item2.ImageUrl = ("Images/bar chart.png")
comboChart.Items.Add(item2)
Dim item3 As New RadComboBoxItem()
item3.Text = "Pie"
item3.Value = "pie"
item3.ImageUrl = ("Images/pie chart.jpg")
comboChart.Items.Add(item3)
Me.divChart.Controls.Add(comboChart)
End Sub
Private Sub CreateColourPicker(ByVal ID As String)
Dim cp As New RadColorPicker()
cp.ID = ID
cp.ShowIcon = True
cp.Style("padding-top") = "1px"
cp.CssClass = "CustomHeight"
Me.divCol.Controls.Add(cp)
End Sub
Protected Sub Update_Click(sender As Object, e As EventArgs) Handles Update.Click
Try
Dim alltxt = divDesc.Controls.OfType(Of TextBox)()
Dim allcomboChart = divChart.Controls.OfType(Of RadComboBox)()
Dim allcomboField = divField.Controls.OfType(Of RadComboBox)()
Dim allcp = divCol.Controls.OfType(Of RadColorPicker)()
''Loop through first set of controls and get values and then the next etc..
Dim Description as string = ''Get Textbox value
Dim Type as string = ''Get RadComboBox value
Dim XFieldName as string = ''Get RadComboBox value
Dim Colour as string = ''Get RadColorPicker value
If Page.IsValid Then
Dim da As New dsSVTableAdapters.Chart
Dim Result As String = da.Series(60, Description, Type, Colour, "YFieldName", XFieldName)
End If
Catch ex As Exception
lblResult.Text = ex.Message
End Try
End Sub
You have a repeated set of controls. Therefore you need a corresponding repeated set of variables that store these values.
I suggest creating a class where you can store a variable (or property) set.
Public Class ControlSet
Public Property Description As String
Public Property Type As String
Public Property XFieldName As String
Public Property Colour As String
End Class
Create an array that holds these values
Dim Values = New ControlSet(ddlFieldNames.SelectedIndex) {}
And retrieve the values in a loop
For i As Integer = 0 To Values.Length - 1
Values(i).Description = CType(divDesc.FindControl("txt-" & Convert.ToString(i + 1)), TextBox).Text
Values(i).Type = CType(divChart.FindControl("comboChart-" & Convert.ToString(i + 1)), RadComboBox).SelectedValue
Values(i).XFieldName = ...
...
Next
Also use the ID of the control; this helps to avoid confusion in case you have several controls of the same type.
you can use .FindControl(string id) method, and you should keep the controls count in your view state or session:
Protected Sub Update_Click(sender As Object, e As EventArgs) Handles Update.Click
Try
''Loop through first set of controls and get values and then the next etc..
For i As Integer = 0 To controlsCount - 1
Dim Description as string = ((TextBox)divDesc.FindControl("txt-" & Convert.ToString(i + 1))).Text ''Get Textbox value
Dim Type as string = ((RadComboBox)divChart.FindControl("comboChart-" & Convert.ToString(i + 1))).SelectedValue ''Get RadComboBox value
Dim XFieldName as string = ((RadComboBox)divField.FindControl("combo-" & Convert.ToString(i + 1))).SelectedValue ''Get RadComboBox value
Dim Colour as string = ((RadColorPicker)divField.FindControl("cp-" & Convert.ToString(i + 1))).SelectedValue ''Get RadColorPicker value
If Page.IsValid Then
Dim da As New dsSVTableAdapters.Chart
Dim Result As String = da.Series(60, Description, Type, Colour, "YFieldName", XFieldName)
Next
End If
Catch ex As Exception
lblResult.Text = ex.Message
End Try
End Sub
I have a repeater list that displays results in sets of 15. When you click the next button it shows the next 15 and so on.
I have added some buttons that will then filter the display to show the results in sets of 10, 25, 50.
When you click these it does work but when you click the next button it resets the display value to 15.
Below is the chunk of script:
Public Property CurrentPage() As Integer
Get
' look for current page in ViewState
Dim o As Object = Me.ViewState("_CurrentPage")
If o Is Nothing Then
Return 0
Else
' default to showing the first page
Return CInt(o)
End If
End Get
Set
Me.ViewState("_CurrentPage") = value
End Set
End Property
Protected Sub ItemsGet()
Dim pageSize As Integer = 15
ItemsGet(pageSize)
End Sub
Private Sub ItemsGet(ByVal pageSize As Integer)
' Read sample item info from XML document into a DataSet
' Populate the repeater control with the Items DataSet
Dim objPds As New PagedDataSource()
Dim selectedCategory As String = ddlCategory.SelectedValue.ToString()
Dim selectedCategoryIndex As Integer = ddlCategory.SelectedIndex
Dim selectedCategoryMonth As String = ddlCategoryMonth.SelectedValue.ToString()
Dim selectedCategoryMonthIndex As Integer = ddlCategoryMonth.SelectedIndex
Dim query = GetXmlDataSet()
If (Not String.IsNullOrEmpty(selectedCategory) And selectedCategoryIndex > 0) Then
query = query.Where(Function(x) x("SCategoryName") = selectedCategory)
End If
If (Not String.IsNullOrEmpty(selectedCategoryMonth) And selectedCategoryMonthIndex > 0) Then
query = query.Where(Function(x) x("SCategoryMonth") = selectedCategoryMonth)
End If
If (query.Count() > 0) Then
objPds.DataSource = query.CopyToDataTable().Rows
objPds.AllowPaging = True
objPds.PageSize = pageSize
objPds.CurrentPageIndex = CurrentPage
lblCurrentPage.Text = "Page: " + (CurrentPage + 1).ToString() + " of " + objPds.PageCount.ToString()
' Disable Prev or Next buttons if necessary
cmdPrev.Enabled = Not objPds.IsFirstPage
cmdNext.Enabled = Not objPds.IsLastPage
Display10.Enabled = True
Display25.Enabled = True
Display50.Enabled = True
categories.DataSource = objPds
categories.DataBind()
Else
CurrentPage = 0
categories.Controls.Clear()
cmdPrev.Enabled = False
cmdNext.Enabled = False
Display10.Enabled = False
Display25.Enabled = False
Display50.Enabled = False
lblCurrentPage.Text = "Page: 0 of 0 "
End If
End Sub
Private Sub Display10_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim pageSize As Integer = 10
CurrentPage = 0
ItemsGet(pageSize)
End Sub
Private Sub Display25_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim pageSize As Integer = 25
CurrentPage = 0
ItemsGet(pageSize)
End Sub
Private Sub Display50_Click(ByVal sender As Object, ByVal e As System.EventArgs)
Dim pageSize As Integer = 50
CurrentPage = 0
ItemsGet(pageSize)
End Sub
Private Sub cmdPrev_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Set viewstate variable to the previous page
CurrentPage -= 1
' Reload control
ItemsGet()
End Sub
Private Sub cmdNext_Click(ByVal sender As Object, ByVal e As System.EventArgs)
' Set viewstate variable to the next page
CurrentPage += 1
' Reload control
ItemsGet()
End Sub
Protected Sub ddlCategory_SelectedIndexChanged1(ByVal sender As Object, ByVal e As System.EventArgs)
CurrentPage = 0
ItemsGet()
End Sub
Protected Sub ddlCategoryMonth_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
CurrentPage = 0
ItemsGet()
End Sub
You need to 'persist' the number of items to get.
There are a few ways to do this....
Re-factor PageSize into a property with its backing kept in the viewstate, remember to initialise with appropriate default values.
Change the ItemsGet sub to use the property instead.
My vb is rusty!
Public Property PageSize() As Integer
Get
If Me.ViewState("PageSize") Is Nothing Then
Me.ViewState("PageSize") = 15
End If
Return CInt( Me.ViewState("PageSize") )
End Get
Set
Me.ViewState("PageSize") = value
End Set
End Property