I want to get the ID of a textbox like below to add validator, the Client ID contains generated string, UniqueID too, but only the ID contains nothing, why?
Protected Sub GridView1_RowDataBound(ByVal sender As GridView, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
'Manipulate only editing row.
If e.Row.RowType = DataControlRowType.DataRow Then
If sender.EditIndex = e.Row.RowIndex Then
'Search textbox and add validators.
For Each cell As TableCell In e.Row.Cells
If cell.Controls.Count = 1 AndAlso TypeOf (cell.Controls(0)) Is TextBox Then
Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)
'txt.ID is nothing...why?
SetValidators(cell.Controls, txt.ID)
End If
Next
End If
End If
End Sub
Well here is a workaround if applies to your application ,
Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)
//'txt.ID is nothing...why?
// Here you can assign new ID to your control as per your logic
txt.ID = "newID";
SetValidators(cell.Controls, txt.ID)
You can try following code to assign the validator control to the gridview control.
I am not sure what your doing with SetValidators()function.
Protected Sub GridView1_RowDataBound(ByVal sender As GridView, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
'Manipulate only editing row.
If e.Row.RowType = DataControlRowType.DataRow Then
If sender.EditIndex = e.Row.RowIndex Then
'Search textbox and add validators.
For Each cell As TableCell In e.Row.Cells
If cell.Controls.Count = 1 AndAlso TypeOf (cell.Controls(0)) Is TextBox Then
Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)
'txt.ID is nothing...why?
SetValidators(cell.Controls, txt.ClientID)
End If
Next
End If
End If
End Sub
Finally, I'v solved that problem by to apply the workaround below.
Dim txt As TextBox = DirectCast(cell.Controls(0), System.Web.UI.WebControls.TextBox)
'The ID is generated by to refer ClientID.
Dim foo = txt.ClientID
'Therefore, already txt.ID is not nothing.
SetValidators(cell.Controls, txt.ID)
Thank you for your cooperation.
Related
trying to delete selected gridview row. I read few sites and used code however I am getting error. I think because most of the codes I've seen they using DataGridView, This code is within delete button event
For i = 0 To myGridView.Rows.Count - 1 Step i + 1
Dim delrow As GridViewRow = myGridView.Rows(i)
If delrow.Selected = True Then
myGridView.Rows.RemoveAt(i)
End If
Next
the two errors I am getting are:
1) RemoveAt is not a member of GridViewRowCollection
2) Selected is not a member of GridViewRow
Your help will be highly appreciated!
I usually delete rows on GridViews putting an ImageButton (with a trash bin) on every row with a Template Field, then on RowDataBound event I associate "DeleteRow" event and rowIndex to the CommandName and CommandArgument
Protected Sub myGridView_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
Dim ib As ImageButton = e.Row.FindControl("ibDeleteRow")
ib.CommandName = "DeleteRow"
ib.CommandArgument = e.Row.RowIndex
End if
end sub
Private Sub myGridView_RowCommand(sender As Object, e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
If e.CommandName = "DeleteRow" Then
Dim rowToDeleteIndex as integer = e.CommandArgument
myGridView.DeleteRow(rowToDeleteIndex)
end if
end sub
Private Sub myGridView_RowDeleting(sender As Object, e As GridViewDeleteEventArgs) Handles GridView1.RowDeleting
End Sub
I have added Textbox like
Protected Sub gvReconciliation_RowDataBound(sender As Object, e As GridViewRowEventArgs) Handles gvReconciliation.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
Dim txtRemarks As New TextBox()
txtRemarks.ID = "txtRemarks"
txtRemarks.Text = TryCast(e.Row.DataItem, DataRowView).Row("Remarks").ToString()
e.Row.Cells(10).Controls.Add(txtRemarks)
End If
End Sub
I am trying to set the selected value of a radiobuttonlist that is a template column within a gridview. I am having to do this using the code behind as the database field containing the data (Status) contains null values hence I cant used SelectedValue='<%# Bind("Status") %>' on the asp side.
It has been suggested that I use onRowDataBound to do this and use DataItem to retrieve the value from the datasource and used it to set the radiobuttonlist selected value but I'm not sure how to do this in vb code.
I've tried the following:
Protected Sub gv_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
Dim radioList = TryCast(e.Row.FindControl("rblActions"), RadioButtonList)
' this will be the object that you are binding to the grid
Dim myObject = TryCast(e.Row.DataItem, DataRowView)
Dim sStatus As String = Convert.ToString(myObject("Status"))
If sStatus <> Nothing Then
radioList.SelectedValue = sStatus
End If
End If
End Sub
but it hasnt work. Any help would be appreciated. Thanks
Found my own solution as follows:
Sub gv_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
Dim rbl As RadioButtonList = CType(e.Row.FindControl("rblActions"), RadioButtonList)
Dim selected As String = e.Row.DataItem("Status").ToString
If Not IsNothing(selected) Then
rbl.SelectedValue = selected
End If
End If
End Sub
The GridView is bound to an Access Table, but I want to update the checkbox using the asp:ButtonField. The best I've been able to do is replace the checkbox with a string value. Below is the code I have now:
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
If e.CommandName = "check" Then
'Enable Editing on the GridView
GridView1.EditIndex = GridView1.SelectedIndex
'Assign value to the row selected
Dim index As Integer = Convert.ToInt32(e.CommandArgument)
'Assign selected gridview row
Dim selectedRow As GridViewRow = GridView1.Rows(index)
'Assign checkbox cell as table cell
Dim selectedCell As TableCell = selectedRow.Cells(0)
'Assign a value to the checkbox, **but instead is replacing the checkbox**
selectedCell.Text = "True"
End If
End Sub
I think you need to use .FindControl().
The GridViewCell is not the same thing as a CheckBox control inside it. You code should probably look more like:
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCommandEventArgs) Handles GridView1.RowCommand
If e.CommandName = "check" Then
'Enable Editing on the GridView
GridView1.EditIndex = GridView1.SelectedIndex
'Assign value to the row selected
Dim index As Integer = Convert.ToInt32(e.CommandArgument)
'Assign selected gridview row
Dim checkBox As CheckBox = GridView1.Rows(index).FindControl("checkBoxIdGoesHere")
checkBox.Checked = true 'or false or whatever based on your command.
End If
End Sub
I've had my own share of problems accessing controls from within GridViews. I solved something similar about a month ago. Assuming that your checkbox control is the only thing in that cell, you could try something like this:
'Assign a value to the checkbox
CType(GridView1.Rows(index).Cells(0).Controls(0), CheckBox).Checked = True
Try that and see if it works. If not, post back and we can take another look.
I am using following code in rowdatabound function.
Protected Sub gvwMileStone_RowDataBound(ByVal sender As System.Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.Footer Then
Dim ddlItem As DropDownList = CType(e.Row.FindControl("ddlFProjectLevels"), DropDownList)
If ddlItem IsNot Nothing Then
ddlItem.DataSource = objMileStone.GetProjectLevels()
ddlItem.DataValueField = "MileStoneID"
ddlItem.DataTextField = "Name"
ddlItem.DataBind()
End If
End If
If e.Row.RowType = DataControlRowType.DataRow Then
If e.Row.RowState = DataControlRowState.Edit Then
Dim ddlEProjectLevels As DropDownList = CType(e.Row.FindControl("ddlEProjectLevels"), DropDownList)
ddlEProjectLevels.DataSource = objMileStone.GetProjectLevels()
ddlEProjectLevels.DataValueField = "MileStoneID"
ddlEProjectLevels.DataTextField = "Name"
ddlEProjectLevels.DataBind()
ddlEProjectLevels.SelectedValue = milestoneid
End If
End If
End Sub
ddlEProjectLevels is dropdownlist in edititemtemplate. When I click edit in 1st row ddlEProjectLevels gets loaded with data from database. But in 2nd row dropdownlist does not contain values. Again in 3rd it gets loaded from db. Means in alternate rows, when I click edit dropdownlist(ddlEProjectLevels) doesn't load values. Can anybody help?
This issue is somewhat confusing compared to other controls and applies to GridView and DetailsView controls. You'll need to check the RowState enumeration using bitwise logic since an item may have a state of Alternate or Edit.
So instead of:
If e.Row.RowState = DataControlRowState.Edit Then
Try:
If (e.Row.RowState And DataControlRowState.Edit) > 0 Then
For more info check out the DataControlRowState Enumeration page.