CODEWITHSUNDEEP
c#wpfdatagrid
getintanked
getintanked

Reputation: 27

Retrieve value of rows column that is databound

I've got a DataGrid that I've setup a doubleclick eventsetter that calls a method. Below is my xaml, following that is my codebehind page. The double click event works, but the return I get is "system.data.datarowview" and I don't know why. I'm trying to get the "vehicleID" value of the row which is its own column that is hidden.

XAML:

<DataGrid Name="OpenVehicles" AutoGenerateColumns="False" IsReadOnly="False" SelectedItem="{Binding vehicleID}" SelectionUnit="FullRow">
<DataGrid.ItemContainerStyle>
    <Style TargetType="DataGridRow">
        <EventSetter Event="MouseDoubleClick" Handler="OpenVehicleClick" />
    </Style>
</DataGrid.ItemContainerStyle>
<DataGrid.Columns>
    <DataGridTextColumn Binding="{Binding vehicleID}" Width="*" Header="vehicleID" Visibility="Hidden"/>
    <DataGridTextColumn Binding="{Binding date, StringFormat=\{0:MMM dd yyyy \}}" Width="*" Header="Date"/>
    <DataGridTextColumn Binding="{Binding companyshortname}" Width="*" Header="Customer"/>
    <DataGridTextColumn Binding="{Binding subject}" Width="5*" Header="Vehicle Description"/>
    <DataGridTextColumn Binding="{Binding FName}" Width="*" Header="Owner"/>
</DataGrid.Columns>

C# Code:

        private void OpenVehicleClick(object sender, RoutedEventArgs e)
    {
        MessageBox.Show(OpenVehicles.CurrentCell.Item.ToString());
    }

Any ideas on how to retrieve the column value or any other suggestions are more than welcome. I'm beyond stumped.

Upvotes: 2

Views: 1134

Answers (3)

slugster
slugster

Reputation: 49985

This bit in your XAML: SelectedItem="{Binding vehicleID}" means that the selected data item will be bound into the property vehicleID of the DataContext of the grid (which will be inherited from the control/page that it is on).

I notice that you've excluded any mention of a ItemsSource on the grid - the vehicleID property should be in the same class as the ItemSource property. You need to ensure that vehicleID is a public property, not a field - you cannot databind to a field. So, here is a couple of options depending on the way you've set things up:

pubic class MyPage
{
    public MyPage()
    {
        InitializeComponent();
        this.DataContext = this;
    }

    private void OpenVehicleClick(object sender, RoutedEventArgs e)
    {
        MessageBox.Show(VehicleID != null ? VehicleID.WhateverProperty : "Nothing selected");
    }

    public MyDataObject VehicleID { get; set; }
}

or, if you have a separate viewmodel assigned to the DataContext of the page/control:

private void OpenVehicleClick(object sender, RoutedEventArgs e)
{
    var selectedDataItem = ((MyViewModel) DataContext).VehicleID;
    MessageBox.Show(selectedDataItem != null ? selectedDataItem.WhateverProperty : "Nothing selected");
}

Upvotes: 1

Shahar G.
Shahar G.

Reputation: 1510

Currently you're reffering to the grid itself. Your event handles a row so use the event parameters to find what you need in the selected row (investigate them in debugging).

Upvotes: 0

Alex Wiese
Alex Wiese

Reputation: 8370

The DataRowView.Row property will contain the DataRow that you want. From there you can access the column value using DataRowView.Row["ColumnName"] indexer

Upvotes: 1

Related Questions