Select All CheckBox In DataGrid And Delete Rows In Silverlight 3


Download Source

Introduction

In the previous article we have seen how to add a Checkbox Column In DataGrid and how to achieve multi select delete operation. In this article we will see how we can select all rows of DataGrid and delete all selected.

Creating Silverlight Project

Fire up Visual Studio 2008 and create a new Silverlight 3 Project. Name it as SelectAllRowsDataGrid.

First we will design our application to have a DataGrid to display data and a Button to Delete Selected Rows.

As you see we have customized the Columns in the DataGrid.

Now we will add a CheckBox Control in the Header of first column.

I tried many ways to put a CheckBox over there, but the effective way is to create a style and assign the style to HeaderStyle of that Column.

Here is the Style in XAML.

<UserControl.Resources>

<Style x:Key=”DataGridColumnHeaderStyle” TargetType=”dataPrimitives:DataGridColumnHeader”>

    <Setter Property=”Foreground” Value=”#FF000000″/>

    <Setter Property=”HorizontalContentAlignment” Value=”Left”/>

    <Setter Property=”VerticalContentAlignment” Value=”Center”/>

    <Setter Property=”IsTabStop” Value=”False”/>

    <Setter Property=”SeparatorBrush” Value=”#FFC9CACA”/>

    <Setter Property=”Padding” Value=”4″/>

    <Setter Property=”Template”>

    <Setter.Value>

    <ControlTemplate TargetType=”dataPrimitives:DataGridColumnHeader”>

    <Grid x:Name=”Root”>

        <Grid.ColumnDefinitions>

        <ColumnDefinition/>

        <ColumnDefinition Width=”Auto”/>

        </Grid.ColumnDefinitions>

        <VisualStateManager.VisualStateGroups>

        <VisualStateGroup x:Name=”CommonStates”>

        <VisualState x:Name=”Normal”/>

        <VisualState x:Name=”MouseOver”>

    <Storyboard>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundRectangle” Storyboard.TargetProperty=”(Fill).Color” To=”#FF448DCA”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[3].Color” To=”#7FFFFFFF”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[2].Color” To=”#CCFFFFFF”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[1].Color” To=”#F2FFFFFF”/>

    </Storyboard>

    </VisualState>

    <VisualState x:Name=”Pressed”>

    <Storyboard>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundRectangle” Storyboard.TargetProperty=”(Fill).Color” To=”#FF448DCA”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[0].Color” To=”#D8FFFFFF”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[1].Color” To=”#C6FFFFFF”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[2].Color” To=”#8CFFFFFF”/>

    <ColorAnimation Duration=”0″ Storyboard.TargetName=”BackgroundGradient” Storyboard.TargetProperty=”(Fill).(GradientStops)[3].Color” To=”#3FFFFFFF”/>

    </Storyboard>

    </VisualState>

    </VisualStateGroup>

    <VisualStateGroup x:Name=”SortStates”>

    <VisualState x:Name=”Unsorted”/>

    <VisualState x:Name=”SortAscending”/>

    <VisualState x:Name=”SortDescending”/>

    </VisualStateGroup>

    </VisualStateManager.VisualStateGroups>

    <Rectangle x:Name=”BackgroundRectangle” Fill=”#FF1F3B53″ Stretch=”Fill” Grid.ColumnSpan=”2″/>

    <Rectangle x:Name=”BackgroundGradient” Stretch=”Fill” Grid.ColumnSpan=”2″>

    <Rectangle.Fill>

    <LinearGradientBrush EndPoint=”.7,1″ StartPoint=”.7,0″>

    <GradientStop Color=”#FCFFFFFF” Offset=”0.015″/>

    <GradientStop Color=”#F7FFFFFF” Offset=”0.375″/>

    <GradientStop Color=”#E5FFFFFF” Offset=”0.6″/>

    <GradientStop Color=”#D1FFFFFF” Offset=”1″/>

    </LinearGradientBrush>

    </Rectangle.Fill>

    </Rectangle>

    <Rectangle x:Name=”VerticalSeparator” Fill=”{TemplateBinding SeparatorBrush}” VerticalAlignment=”Stretch” Width=”1″ Visibility=”{TemplateBinding SeparatorVisibility}” Grid.Column=”1″/>

    <CheckBox x:Name=”chkSelectAll” Click=”chk_Click” Margin=”2,0,0,0″ Content=”Select” d:LayoutOverrides=”Width, Height” VerticalAlignment=”Center” HorizontalAlignment=”Left”/>

    </Grid>

    </ControlTemplate>

    </Setter.Value>

    </Setter>

    </Style>

    </UserControl.Resources>

 

Now assign the Style to your HeaderStyle of the Column.

<data:DataGrid x:Name=”dgPerson” Margin=”8″ Grid.Column=”1″ IsReadOnly=”True”


LoadingRow=”dgPerson_LoadingRow” Grid.Row=”1″ AutoGenerateColumns=”False”>


<data:DataGrid.Columns>


<data:DataGridTemplateColumn Width=”80″
HeaderStyle=”{StaticResource DataGridColumnHeaderStyle}”>


<data:DataGridTemplateColumn.CellTemplate>


<DataTemplate>


<CheckBox x:Name=”chkPerson” Click=”chkPerson_Click”


VerticalAlignment=”Center” IsChecked=”false” HorizontalAlignment=”Center” HorizontalContentAlignment=”Center”/>


</DataTemplate>


</data:DataGridTemplateColumn.CellTemplate>


</data:DataGridTemplateColumn>


<data:DataGridTextColumn Header=”Name” Binding=”{Binding Name}” MinWidth=”120″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


<data:DataGridTextColumn Header=”Age” Binding=”{Binding Age}” MinWidth=”75″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


<data:DataGridTextColumn Header=”Country” Binding=”{Binding Country}” MinWidth=”120″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


<data:DataGridTextColumn Header=”Gender” Binding=”{Binding Gender}” MinWidth=”120″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


<data:DataGridTextColumn Header=”Email Id” Binding=”{Binding EmailId}” MinWidth=”120″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


<data:DataGridTextColumn Header=”Joined On” Binding=”{Binding JoinedOn}” MinWidth=”120″ Width=”SizeToCells” CanUserReorder=”True” CanUserSort=”True”/>


</data:DataGrid.Columns>


</data:DataGrid>

 

Now Run the Application to see the Header CheckBox.

Now we will create a class that will hold the Properties of sample data and create sample data to populate the DataGrid.

public
class
Person

{


public
string Name { get; set; }


public
int Age { get; set; }


public
string Country { get; set; }


public
string Gender { get; set; }


public
string EmailId { get; set; }


public
DateTime JoinedOn { get; set; }

}

//List for Original List of Persons


ObservableCollection<Person> myList;


//List for selected Persons


ObservableCollection<Person> personList = new
ObservableCollection<Person>();

 


public MainPage()

{

InitializeComponent();

 

myList = new
ObservableCollection<Person>()

{


new
Person{ Name=“Person 1”, Age=21, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 2”, Age=29, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 3”, Age=20, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 4”, Age=22, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 5”, Age=23, Country=“India”, Gender=“Female”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 6”, Age=23, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 7”, Age=25, Country=“India”, Gender=“Female”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 8”, Age=25, Country=“India”, Gender=“Female”, EmailId=“some@some.com”, JoinedOn=DateTime.Now},


new
Person{ Name=“Person 9”, Age=24, Country=“India”, Gender=“Male”, EmailId=“some@some.com”, JoinedOn=DateTime.Now}

};

dgPerson.ItemsSource = myList;

}

 

We will add the event for LoadingRow for the DataGrid.

private
void dgPerson_LoadingRow(object sender, DataGridRowEventArgs e)

{


CheckBox chk = (CheckBox)this.dgPerson.Columns[0].GetCellContent(e.Row);

chk.Click += new
RoutedEventHandler(chkPerson_Click);


Person p = chk.DataContext as
Person;

chk.IsChecked = personList.Contains(p);

}

 

Now we will add the Click event handler to the Header CheckBox and the CheckBox in DataGrid Rows.

void chk_Click(object sender, RoutedEventArgs e)

{


CheckBox chk = sender as
CheckBox;


bool check = chk.IsChecked.Value;


if (check)

{


foreach (Person p in myList)

{

personList.Add(p);

chk = dgPerson.Columns[0].GetCellContent(p) as
CheckBox;


if (chk != null)

chk.IsChecked = true;

}

}


else

{


foreach (Person p in myList)

{

chk = dgPerson.Columns[0].GetCellContent(p) as
CheckBox;


if (chk != null)

chk.IsChecked = false;

}

personList.Clear();

}

}

 


private
void chkPerson_Click(object sender, RoutedEventArgs e)

{


CheckBox chk = sender as
CheckBox;


bool check = chk.IsChecked.Value;


Person p = chk.DataContext as
Person;


if (check)

{


if (!personList.Contains(p))

personList.Add(p);

}


else

{

personList.Remove(p);

}

}

 

Now we will have the Delete Button Click handler.

private
void btnDelete_Click(object sender, RoutedEventArgs e)

{


string persons = string.Empty;


foreach (var item in personList)

{

myList.Remove(item);

}

dgPerson.ItemsSource = myList;

personList.Clear();

}

 

Now we will run the application and test the application.

If we click on the Select CheckBox in the header of the First Column, all the rows would be selected.

Now if we don’t need everything to be selected but few, then we would uncheck the respective rows.

Now we would delete the selected rows.

The selected rows got deleted.

Hope this article helps.

Advertisements