Datatemplate event via XamlReader : The Official Microsoft Silverlight Site

11-23-2008 10:35 AM

Datatemplate event via XamlReader

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Hello,

I'm trying to create a datatemplate column with an event, but it doesn't fire.

checkTemplate.Append("<DataTemplate ");
checkTemplate.Append("xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' ");
checkTemplate.Append("xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>");
checkTemplate.Append("<CheckBox IsChecked='{Binding &1}'/>");
checkTemplate.Append("</DataTemplate>");
checkEditTemplate.Append("<DataTemplate ");
checkEditTemplate.Append("xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' ");
checkEditTemplate.Append("xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>");

checkEditTemplate.Append("<CheckBox IsChecked='{Binding &1}' Click='CheckBox_Click'/>");

checkEditTemplate.Append("</DataTemplate>");
((DataGridTemplateColumn)column).CellTemplate = (DataTemplate)XamlReader.Load(checkTemplate.ToString().Replace("&1", field.Name));
((DataGridTemplateColumn)column).CellEditingTemplate = (DataTemplate)XamlReader.Load(checkEditTemplate.ToString().Replace("&1", field.Name));
private void CheckBox_Click(object sender, RoutedEventArgs e)
{

}

If i define the template through a resource the event does fire.

jkattestaart

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Joined on 07-29-2007
Posts 25

11-23-2008 5:43 PM

Re: Datatemplate event via XamlReader

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The XamlReader doesn't support adding events. Instead, give your checkbox an x:Name and then once you add your Xaml to the tree you can find it and attach the event handler.

-- bryant

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bryant

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Joined on 10-23-2002
Simi Valley, CA
Posts 1,153

11-24-2008 3:40 PM

Re: Datatemplate event via XamlReader

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Bryant,

Thanks for your response. This seems to work but ...

checkTemplate.Append("<DataTemplate ");

checkTemplate.Append("xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' ");

checkTemplate.Append("xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>");

checkTemplate.Append("<CheckBox x:Name ='Check_&1' IsChecked='{Binding &1, Mode=TwoWay}'/>");

checkTemplate.Append("</DataTemplate>");

checkEditTemplate.Append("<DataTemplate ");

checkEditTemplate.Append("xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' ");

checkEditTemplate.Append("xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'>");

checkEditTemplate.Append("<CheckBox x:Name ='EditCheck_&1' IsChecked='{Binding &1, Mode=TwoWay}'/>");

case "Boolean":

column = new DataGridTemplateColumn();

((DataGridTemplateColumn)column).CellTemplate = (DataTemplate)XamlReader.Load(checkTemplate.ToString().Replace("&1", field.Name));

((DataGridTemplateColumn)column).CellEditingTemplate = (DataTemplate)XamlReader.Load(checkEditTemplate.ToString().Replace("&1", field.Name));

:

column.Header = field.ShortLabel;

if (field.ColumnWidth != 0)column.Width = new DataGridLength(field.ColumnWidth);

dataGrid.Columns.Add(column);

if (field.DataType == "Boolean")

{

CheckBox cb = dataGrid.FindName("EditCheck_" + field.Name) as CheckBox;

cb.Click += new RoutedEventHandler(cb_Click);

}

The findname returns null, how do i find my control?

jkattestaart

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Joined on 07-29-2007
Posts 25

11-28-2008 12:31 AM

Re: Datatemplate event via XamlReader

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Hi Jkat,

Unfortunately we can't. Controls in a DataTemplate reside in a separate name scope. The only way to modify the control is to create an event handler for the control, and use the sender parameter to get a reference of the control.

Best regards,

Jonathan

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Jonathan Shen
Microsoft Online Community Support
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Jonathan Shen – MSFT

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Posts 1,522