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problem in datatemplate in combobox

Posted on 2010-11-23
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Last Modified: 2012-08-13
Hi

I have created a combobox and along with that I have created a datatemplate. In the code behind I am binding the combobox with a datatable. But I am not getting the datatable.


Please check the code section.


What is going wrong.


Regards
Karan Gupta
<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="300" Width="300" Loaded="Window_Loaded">
    <Grid>
        <Grid.Resources>
            <DataTemplate x:Key="ComboBoxDataTemplate">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="0.2*"></ColumnDefinition>
                        <ColumnDefinition Width="0.8*"></ColumnDefinition>
                    </Grid.ColumnDefinitions>
                    <CheckBox Grid.Column="0" Width="10" Height="10"></CheckBox>
                    <TextBlock Grid.Column="1" Text="{Binding Text}"></TextBlock>
                </Grid>
            </DataTemplate>
        </Grid.Resources>
        <ComboBox x:Name="Test" ItemsSource="{Binding}" 
                  DisplayMemberPath="Drug" 
                  SelectedValuePath="ID"
                  Width="100" Height="20" ItemTemplate="{StaticResource ComboBoxDataTemplate}">            
        </ComboBox>
    </Grid>
</Window>


-----------------Code Behind---------------------------
public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private string lcl_SelectedText;
        public string SelectedText
        {
            get { return lcl_SelectedText; }
            set { lcl_SelectedText = value; }
        }
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            DataTable dt = GetTable();
            Test.DataContext = dt;
            Test.SelectedValue = 1;
        }
        static DataTable GetTable()
        {
            //
            // Here we create a DataTable with four columns.
            //
            DataTable table = new DataTable();
            table.Columns.Add("ID", typeof(int));
            table.Columns.Add("Drug", typeof(string));           

            //
            // Here we add five DataRows.
            //
            table.Rows.Add(1, "Indocin");
            table.Rows.Add(2, "Enebrel");
            table.Rows.Add(3, "Hydralazine");
            table.Rows.Add(4, "Combivent");
            table.Rows.Add(5, "Dilantin");
            return table;
        }

    }

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Question by:KaranGupta
2 Comments
 
LVL 5

Accepted Solution

by:
buraksarica earned 500 total points
ID: 34195284
You can not use Display Member and Itemtemplate at the same time.
Just remove the displaymember setting and change the DataTemplate like following:

<Window x:Class="Stadion.cbDt"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="cbDt" Height="300" Width="300">
    <Grid>
        <Grid.Resources>
            <DataTemplate x:Key="ComboBoxDataTemplate">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="0.2*"></ColumnDefinition>
                        <ColumnDefinition Width="0.8*"></ColumnDefinition>
                    </Grid.ColumnDefinitions>
                    <CheckBox Grid.Column="0" Width="10" Height="10"></CheckBox>
                    <TextBlock Grid.Column="1" Text="{Binding Drug}"></TextBlock>
                </Grid>
            </DataTemplate>
        </Grid.Resources>
        <ComboBox x:Name="Test" ItemsSource="{Binding}"                   
                  SelectedValuePath="ID"
                  Width="100" Height="20" ItemTemplate="{StaticResource ComboBoxDataTemplate}">
        </ComboBox>
    </Grid>
</Window>

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Author Closing Comment

by:KaranGupta
ID: 34195379
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