How can I send multiple command parameters to Button inside a datagrid ?

Question

I

<sdk:DataGrid x:Name="dgList" Grid.Column="0" Grid.Row="1" HeadersVisibility="All" IsReadOnly="True" Width="324" AutoGenerateColumns="False">
                    <sdk:DataGrid.Columns>
                        <sdk:DataGridTextColumn Header="Department ID" Binding="{Binding DepartmentID}"></sdk:DataGridTextColumn>
                        <sdk:DataGridTextColumn Header="Department Name" Binding="{Binding DepartmentName}"></sdk:DataGridTextColumn>
                        <sdk:DataGridTemplateColumn Header="">
                            <sdk:DataGridTemplateColumn.CellTemplate>
                                <DataTemplate>
                                    <Button x:Name="btnEdit" Content="Edit" CommandParameter="{Binding DepartmentName}" Click="btnEdit_Click">
                                    </Button>
                                </DataTemplate>
                            </sdk:DataGridTemplateColumn.CellTemplate>
                        </sdk:DataGridTemplateColumn>
                    </sdk:DataGrid.Columns>
                </sdk:DataGrid>

I nee Button CommandParameter to send multiple parameters in button click event. How can I acheive this ?

Answer 1

You'll have to bind to a single parameter which is a class that has multiple properties

for instance:

// the binding itself:
CommandParameter="{Binding DepartmentInfo}"

// which exists in your VM as:
public DepartmentInfo DepartmentInfo { get // yadda yadda yadda

// which is an instance of:
public class DepartmentInfo
{
    public string DepartmentName { get... // etc
    public Employee DepartmentLeader { get... //etc
    public string DepartmentId { get... // etc
    // and whatever other properties you would need
} 

The entire DepartmentInfo instance would be passed as a parameter, and you could get any property as needed.

Answer 2

You'll have to bind to a single parameter which is a class that has multiple properties

for instance:

// the binding itself:
CommandParameter="{Binding DepartmentInfo}"

// which exists in your VM as:
public DepartmentInfo DepartmentInfo { get // yadda yadda yadda

// which is an instance of:
public class DepartmentInfo
{
    public string DepartmentName { get... // etc
    public Employee DepartmentLeader { get... //etc
    public string DepartmentId { get... // etc
    // and whatever other properties you would need
} 

The entire DepartmentInfo instance would be passed as a parameter, and you could get any property as needed.

Hi thanks for reply, I tried your code as it is but I am getting null while fetching the DepartmentInfo in the data context of button.

Answer 3

http://stackoverflow.com/questions/7589025/binding-command-inside-datagridtemplatecolumn

http://stackoverflow.com/questions/3724335/command-parameter-is-null-in-a-command-of-customdatagrid

http://stackoverflow.com/questions/6583135/command-binding-inside-a-datagridtemplatecolumn

http://stackoverflow.com/questions/6384821/button-command-not-binding-to-viewmodel-in-datgrid

Answer 4

Does the DataContext you're using actually have a property called DepartmentInfo?  Did you initialize it?  I didn't give you a copy/paste solution, just a concept.

Answer 5

Does the DataContext you're using actually have a property called DepartmentInfo?  Did you initialize it?  I didn't give you a copy/paste solution, just a concept.

Well, it didn't have any property. I just created it by myself with the underlying properties. 

Answer 6

n00raina

I thought, you can try this.

<Button CommandParameter="{Binding Path=DataContext, RelativeSource={RelativeSource Self}}" Click="Button_Click"/>

 

Why not cast it from the button's DataContext?