[Webinar] Streamline your web hosting managementRegister Today

x
?
Solved

wpf datagrid

Posted on 2013-11-14
1
Medium Priority
?
726 Views
Last Modified: 2013-11-14
I'm using Visual Studios 2010, wpf with vb.net.  I have a window with a 3 radio buttons and a datagrid.  When the user selects a radio button I load the datagrid from a table.

The datagrid loads with the data from the datatable but it appends the columns to existing datagrid.  So, the first selection loads fine but and subsequent selection adds the new columns to the right of the columns from the previous selection.

How do I remove the previous columns and load the datagrid from the new table with just those columns displayed?  

I've tried:
    DataGrid1.Items.Clear()  -- data is cleared from rows but columns and headings remain
           &
    BindingOperations.ClearAllBindings(DataGrid1) - -- data is cleared from rows but columns and headings remain
            &
    For Each dc As DataGridColumn In DataGrid1.Columns
                           DataGrid1.Columns.Remove(dc)

     Next   -- throws InvalidOperationException: Collection was modified; enumeration operation may not execute.
 


Code to load the datagrid similar for each radio button selected.  Different number of coumns being displayed depending on the selection.

 Dim col1 As New DataGridTextColumn()
        Dim col2 As New DataGridTextColumn()
        Dim col3 As New DataGridTextColumn()
        Dim col4 As New DataGridTextColumn()
        Dim col5 As New DataGridTextColumn()

        DataGrid1.Columns.Add(col1)
        DataGrid1.Columns.Add(col2)
        DataGrid1.Columns.Add(col3)
        DataGrid1.Columns.Add(col4)
        DataGrid1.Columns.Add(col5)


        For Each drA As System.Data.DataRow In dtAgenaItems.Rows
            DataGrid1.Items.Add(New myAgendaItems With {.dayName = drA.Item("AGENDA_DAY"), .dayItem = drA.Item("ITEM_NAME"), .asscDisplay = drA.Item("ASSOCIATED_DISPLAY"), .sortDay = drA.Item("SORT_DAY"), .sortItem = drA.Item("SORT_ITEM")})
            col1.Binding = New Binding("dayName")
            col2.Binding = New Binding("dayItem")
            col3.Binding = New Binding("asscDisplay")
            col4.Binding = New Binding("sortDay")
            col5.Binding = New Binding("sortItem")

        Next

        col1.Header = "DAY"
        col2.Header = "ITEM"
        col3.Header = "DISPLAY"
        col4.Header = "SORT DAY"
        col5.Header = "SORT ITEM"
        blnFirstTime = False
        DataGrid1.Items.Refresh()


-------
XAML
<Window x:Class="SettingsPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="SettingsPage" Height="300" Width="300">
    <Grid>
        <RadioButton Content="Agenda List" Height="16" Name="RadioButton1" GroupName="TableSelection" Margin="84,36,96,208" />
        <RadioButton Content="Items" Height="16" Name="RadioButton3" GroupName="TableSelection" Margin="84,59,84,186" />
        <RadioButton Content="Agenda List Items" Height="16" Name="RadioButton2" GroupName="TableSelection" Margin="84,80,64,164" />

        <DataGrid AutoGenerateColumns="False" Height="147" Margin="12,102,0,0" Name="DataGrid1"  VerticalAlignment="Stretch" Width="254" HorizontalAlignment="Stretch" />
    </Grid>
</Window>
0
Comment
Question by:bkrbbnsEE
1 Comment
 

Accepted Solution

by:
bkrbbnsEE earned 0 total points
ID: 39648570
Guess I was over thinking it.  Since I had the datatables and adapters I just changed my logic:



        DataGrid1.ItemsSource = Nothing

        DataGrid1.ItemsSource = dtAgendaDays

        DataGrid1.Items.Refresh()

Seems to be working fine!
0

Featured Post

[Webinar] Kill tickets & tabs using PowerShell

Are you tired of cycling through the same browser tabs everyday to close the same repetitive tickets? In this webinar JumpCloud will show how you can leverage RESTful APIs to build your own PowerShell modules to kill tickets & tabs using the PowerShell command Invoke-RestMethod.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
Native ability to set a user account password via AD GPO was removed because the passwords can be easily decrypted by any authenticated user in the domain. Microsoft recommends LAPS as a replacement and I have written an article that does something …
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Is your organization moving toward a cloud and mobile-first environment? In this transition, your IT department will encounter many challenges, such as navigating how to: Deploy new applications and services to a growing team Accommodate employee…

591 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question