I dynamically create textboxes by a click of a button... then i would like to get the values from the textboxes that i created to insert to the database.. I use VB.NET 2008.
this are some sample codes..
For x As Integer = 0 To mydt.Rows.Count - 1
l = New Label()
tb = New TextBox()
tb.ID = x.ToString()
l.ID = x.ToString
l.Text = bb
Panel1.Controls.Add(l)
Panel1.Controls.Add(tb)
tb.Text = mydt.Rows(x).Item(0)
Next
I just assumed that you are working in winforms, You can do it by assigning unique name to your text boxes like this,
For x As Integer = 0 To mydt.Rows.Count - 1
l = New Label()
tb = New TextBox()
tb.name = "txt" & x 'Name your text box
tb.ID = x.ToString()
l.ID = x.ToString
l.Text = bb
Panel1.Controls.Add(l)
Panel1.Controls.Add(tb)
tb.Text = mydt.Rows(x).Item(0)
Next
So in the next step, since you are adding those textboxes in to panel1, you can fetch it directly from that container like below,
For x As Integer = 0 To mydt.Rows.Count - 1
MsgBox(Ctype( panel1.Controls("txt" & x),textbox).text)
Next
Related
I am dynamically creating checkboxes in VB.Net and an .aspx page, based on values in my db. I'm placing them in a two column table for ease of alignment. this part works fine.
Private Async Function InitForEditAsync() As Task
Dim docList = Await GetLoanApplicationConfigurationDocs()
Dim row = New HtmlTableRow()
Dim cell = New HtmlTableCell()
Dim i = 0
For Each doc In docList
Dim chkBox = New HtmlInputCheckBox()
Dim lbl = New Label()
Dim remainder = i Mod 2
chkBox.ID = "chkDocId" + doc.Id.ToString
lbl.Text = doc.DisplayName
cell.Controls.Add(chkBox)
cell.Controls.Add(lbl)
row.Cells.Add(cell)
cell = New HtmlTableCell()
If remainder <> 0 OrElse i = docList.Count() - 1 Then
tblEdit.Rows.Add(row)
row = New HtmlTableRow()
End If
i += 1
Next
End Function
Now I need to retrieve the values without knowing the id's but am not having any luck. I tried this:
For Each chkBox As HtmlInputCheckBox In pnlEdit.Controls.OfType(Of HtmlInputCheckBox)
but the checkboxes are not returned in the list of controls. The table is, but there are no rows in the table object when I explored it in the control collection and when I tried this:
For Each row As HtmlTableRow In tblEdit.Rows.OfType(Of HtmlTableRow)
If it will help, here is a Snip of the UI and the HTML that is created:
Any suggestions are appreciated. Thanks in advance.
Based on some ideas I got from another site, I'm going to rewrite this using the asp:CheckBoxList. apparently it binds like a datagrid and you can enumerate through it. Seems like what i need.
UPDATE: Everything I posted to start was resolved with five lines of code! "cblDocList is my asp CheckboxList and docList is my ienumerable of objects.
cblDocList.RepeatColumns = 2
cblDocList.DataSource = docList
cblDocList.DataTextField = "DisplayName"
cblDocList.DataValueField = "Id"
cblDocList.DataBind()
It’s something you can do through a loop for each row and each cell or using Linq to have only cells that have controls of type HtmlInputCheckBox inside.
I have simplified your code to be able run that here also shows you an example to achieve your task. Obviously you must change following your exigences .
Hope I well understood :)
Dim tblEdit As New HtmlTable
For k As Integer = 0 To 10
Dim cell = New HtmlTableCell()
Dim row = New HtmlTableRow()
Dim chkBox = New HtmlInputCheckBox()
Dim lbl = New Label()
Dim remainder = k Mod 2
chkBox.ID = "chkDocId_" + k.ToString
chkBox.Checked = remainder = 0
lbl.Text = "Text indicator of CheckBox nr:" + k.ToString
cell.Controls.Add(chkBox)
cell.Controls.Add(lbl)
row.Cells.Add(cell)
cell = New HtmlTableCell()
tblEdit.Rows.Add(row)
Next
Dim checkBoxes As IEnumerable(Of HtmlInputCheckBox) =
(From mRow In tblEdit.Rows).Select(Function(mr)
Dim cb = (From cc In CType(mr, HtmlTableRow).Cells
Where CType(cc, HtmlTableCell).Controls.OfType(Of HtmlInputCheckBox).Count > 0
Select CType(cc, HtmlTableCell).Controls.OfType(Of HtmlInputCheckBox)()(0)).FirstOrDefault
Return CType(cb, HtmlInputCheckBox)
End Function).ToList
For Each checkBox In checkBoxes
Debug.WriteLine("CheckBox ID: {0} Checked: {1} ", checkBox.ID, checkBox.Checked)
Next
Hi I am trying to add two controls into a table cell the code is below. Unfortunately the hyperlink is always outside the table cell, whilst the label is inside. Individually they are working fine but together not so good, could somebody help me please.
Dim iCell As New TableCell
Dim lbl As New Label
lbl.Height = Unit.Pixel(100)
lbl.Width = Unit.Pixel(150)
lbl.Style.Add("padding", "5px")
lbl.Style.Add("border-radius", "10px")
lbl.BorderStyle = BorderStyle.Solid
lbl.BorderWidth = Unit.Pixel(1)
lbl.BorderColor = Color.Black
lbl.Font.Size = 9
lbl.Text = "Event: " & dt.Rows(y).Item("eventname")
lbl.BackColor = ColorTranslator.FromHtml(dt.Rows(y).Item("roomcolor"))
Dim hyp As New HyperLink
hyp.Font.Size = 9
hyp.Text = "Modify"
hyp.NavigateUrl = "modify.aspx"
iCell.Controls.Add(lbl)
iCell.Controls.Add(hyp)
iCell.VerticalAlign = VerticalAlign.Top
tRow.Cells.Add(iCell)
I have created a table dynamically on an asp.net page by creating the rows based of off the number of rows in a dataset from a SQL database. I used a for loop to create my rows and cells with the populated dropdownlists in the page_load() function. My table is created exactly how it needs to be, but I need to get the selected item text for each cell in every row to store back to a database table upon clicking the submit button. I initially have a placeholder on my asp page and replace it with the created table on load. For some reason, when i try to use
For Each r As TableRow In LineupTable.Rows
msgbox(EmployeeDDL.SelectedItem.Text)
Next r
it gives me a null value error for employeeddl.selecteditem.text.
This is how I generate my table.
'Dynamically create table rows and cells and populate them with the proper controls and/or information
Dim numrows As Integer = dtEQP.Rows.Count
Dim numcells As Integer = 6
Dim j As Integer
For j = 0 To numrows - 1
r = New TableRow()
c1 = New TableCell() With {.Width = 300}
c1.Controls.Add(New LiteralControl(dtEQP.Rows(j).ItemArray(0)))
r.Cells.Add(c1)
c2 = New TableCell() With {.Width = 200}
Dim EmployeeDDL As New DropDownList()
EmployeeDDL.DataSource = dsEMP
EmployeeDDL.DataTextField = "FirstName"
EmployeeDDL.DataValueField = "ID"
EmployeeDDL.DataBind()
EmployeeDDL.Items.Insert(0, New ListItem("", "-1"))
c2.Controls.Add(EmployeeDDL)
r.Cells.Add(c2)
c3 = New TableCell() With {.Width = 180}
Dim CodeDDL As New DropDownList()
CodeDDL.Items.Add("0-Running")
CodeDDL.Items.Add("99-Idle")
CodeDDL.Items.Add("60-Down")
CodeDDL.Items.Add("1-Weather")
CodeDDL.SelectedValue = "99-Idle"
c3.Controls.Add(CodeDDL)
r.Cells.Add(c3)
c4 = New TableCell() With {.Width = 100}
Dim RideDDL1 As New DropDownList()
RideDDL1.DataSource = dsRide
RideDDL1.DataTextField = "Ridename"
RideDDL1.DataValueField = "RideID"
RideDDL1.DataBind()
RideDDL1.Items.Insert(0, New ListItem("", "-1"))
c4.Controls.Add(RideDDL1)
r.Cells.Add(c4)
c5 = New TableCell() With {.Width = 200}
Dim OTddl1 As New DropDownList()
OTddl1.DataSource = dsEMP2
OTddl1.DataTextField = "FirstName"
OTddl1.DataValueField = "ID"
OTddl1.DataBind()
OTddl1.Items.Insert(0, New ListItem("", "-1"))
c5.Controls.Add(OTddl1)
r.Cells.Add(c5)
c6 = New TableCell() With {.Width = 350}
Dim CommentsTxtBx As New TextBox()
c6.Controls.Add(CommentsTxtBx)
r.Cells.Add(c6)
LineupTable.Rows.Add(r)
Next j
Any ideas on how I should be retrieving this value in my on click subroutine to get what was actually selected?
First when you add the DropDownList, give it an ID (use your cursor variable to avoid having a duplicate ID):
EmployeeDDL.ID = "EmployeeDDL" & j.ToString()
Secondly, since the DropDownList was dynamically added you need to use FindControl to get an instance of it. Also, make sure SelectedItem is not null/nothing.
Dim intCursor As Integer = 0
For Each r As TableRow In LineupTable.Rows
Dim ddlTarget As DropDownList = Cast(r.Cells(1).FindControl("EmployeeDDL" & intCursor.ToString()), DropDownList)
If Not ddlTarget.SelectedItem Is Nothing Then
Dim strValue = ddlTarget.SelectedItem.Text
End If
intCursor += 1
Next r
I am having Component table, Role table, and ComponentRoleMapping table in database. Please look at the image below. I want to populate the column Component names as first column filled with all rows and roles should be the first row of grid from Role table. All cell have to have check box. The matrix co-ordinate have to save that coordination in ComponentRoleMapping table by clicking on any check box. In short to populate many to many relationship among components and Roles I need this view. I am using asp.net web form and gridview control to populate this. how to populate single gridview from 2 tables / datatables ? Or any other control I can use here. Or any article I can follow for exact purpose?
you need a RoleComponent table which is a simple table of pk's that maps a Component to a Role. Sample table:
CREATE TABLE [dbo].[RoleComponent](
[role_pk] [int] NOT NULL,
[component_pk] [int] NOT NULL
) ON [PRIMARY]
A checkbox is initially checked if an entry in this table exists for a specific role and component.
When a user:
Checks a checkbox: insert a row for the given role_pk and component_pk
UnCheck a checkbox: delete a row for the given role_pk and component_pk
To get the grid of checkboxes as you have in your display you are going to need to return a pivot table of bit fields. Pivot tables are not simple in SqlServer. In fact they are downright annoying.
A Repeater might be a better option.
I am answering my own question, It might helpful to others. Rather to use Grid control I used Html table only.
Here Dt1 has Components, Dt2 has Roles and Dt3 used for to check active status. May be some dead code in this but, running perfect.
Private Sub GenerateTable(dt2 As DataTable, dt1 As DataTable, dt3 As DataTable)
Dim table As New Table()
Dim row As TableRow = Nothing
'Add the Headers
row = New TableRow()
'Empty
Dim headerCellEmpty As New TableHeaderCell()
headerCellEmpty.Text = ""
headerCellEmpty.Attributes("style") = "border:1px solid black;text-align:center;"
row.Cells.Add(headerCellEmpty)
For i As Integer = 0 To dt2.Rows.Count - 1
Dim headerCell As New TableHeaderCell()
headerCell.Text = dt2.Rows(i)(0).ToString()
headerCell.ID = dt2.Rows(i)(1).ToString()
'Check All Components
Dim chkAllComponent As New CheckBox()
chkAllComponent.ID = "allcomponents_" + dt2.Rows(i)(1).ToString()
chkAllComponent.Text = dt2.Rows(i)(0).ToString()
headerCell.Controls.Add(chkAllComponent)
headerCell.Attributes("style") = "border:1px solid black;text-align:center;width:15%;"
row.Cells.Add(headerCell)
Next
table.Rows.Add(row)
'Add the Column values
For i As Integer = 0 To dt1.Rows.Count - 1
row = New TableRow()
For j As Integer = 0 To dt1.Columns.Count - 2
Dim cell As New TableCell()
cell.Text = dt1.Rows(i)(j).ToString()
cell.ID = dt1.Rows(i)(j + 1).ToString()
'Check All Roles
Dim chkAllRoles As New CheckBox()
chkAllRoles.ID = "allroles_" + dt1.Rows(i)(j + 1).ToString()
chkAllRoles.Text = dt1.Rows(i)(j).ToString()
cell.Controls.Add(chkAllRoles)
row.Cells.Add(cell)
Next
' Add the TableRow to the Table
table.Rows.Add(row)
Next
If table.Rows.Count > 0 Then
If table.Rows(0).Cells.Count > 0 Then
'Add check boxes
Dim allColumnsCountinTable As Integer = table.Rows(0).Cells.Count
For Each tr As TableRow In table.Rows
Dim rowIndex As Integer = table.Rows.GetRowIndex(tr)
If rowIndex = 0 Then
Else
For f As Integer = 1 To allColumnsCountinTable - 1
Dim cell As New TableCell()
Dim roleid = table.Rows(rowIndex).Cells(0).ID
Dim roleId1 As Guid = New Guid(roleid)
Dim componentid = table.Rows(0).Cells(f).ID
Dim Check1 As New CheckBox()
Check1.ID = "chk_" + roleid + "_" + componentid
Dim configurations = From p In dt3.AsEnumerable() Select p
If (configurations.Any(Function(coffee) c.Field(Of Integer)("ComponentId") = componentid And c.Field(Of Guid)("RoleId") = roleId1)) Then
Dim isActive = configurations.Where(Function(coffee) c.Field(Of Integer)("ComponentId") = componentid And c.Field(Of Guid)("RoleId") = roleId1).FirstOrDefault()("IsActive")
If isActive = True Then
Check1.Checked = True
Else
Check1.Checked = False
End If
Else
Check1.Checked = False
End If
Check1.Attributes("Name") = "checkbox"
cell.Attributes("style") = "border:1px solid black;text-align:center;"
cell.Controls.Add(Check1)
tr.Cells.AddAt(f, cell)
Next
End If
tr.Attributes("style") = "color:red; border:1px solid black;"
Next
End If
End If
'Styling
Panel1.Controls.Add(table)
End Sub
I have some Code in VB that is looping through a gridview's rows and is checking the values of a certain collumn, I have written some code inside the if statement that creates a clickable label inside the cell for when the cell is "", I have already written a bit of code that could create my label but I'm not too sure how it would create it inside row.Cells(8)
I was wondering if could get some assistance with how I should be doing this?...
Here's my Code:
For i As Integer = 0 To GridView1.Rows.Count - 1
Dim row = GridView1.Rows(i)
Dim rowHeaderCell = row.Cells(8)
If rowHeaderCell.Text = " " Then
Dim lbl As New Label
lbl.Size = New System.Drawing.Size(159, 23)
lbl.Location =
lbl.Text = "label text goes here"
Me.Controls.Add(lbl)
End If
Next
Thankyou in advance!
To make a clickable label change the type of the column to : [DataGridViewLinkColumn]
here is the code to replace the Empty cell value by the value of LBL:
For i As Integer = 0 To GridView1.Rows.Count - 1
If GridView1.Rows(i).Cells(8).Value.Trim = "" Then
Dim lbl As String
lbl = "label text goes here "
GridView1.Rows(i).Cells(8).Value = lbl
End If
Next