Solved

wpf datagrid

Posted on 2013-11-14
1
700 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

Gigs: Get Your Project Delivered by an Expert

Select from freelancers specializing in everything from database administration to programming, who have proven themselves as experts in their field. Hire the best, collaborate easily, pay securely and get projects done right.

Question has a verified solution.

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

More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
A theme is a collection of property settings that allow you to define the look of pages and controls, and then apply the look consistently across pages in an application. Themes can be made up of a set of elements: skins, style sheets, images, and o…
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
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…

776 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