Questions on UI for WPF Forum

3 answers

105 views

I'd like to have the pagesize for the data pager be dependent on how many items can fit in the gridview without scrolling. I'm assuming I can write code to do this, but was wondering if there might be a better way.

DataPager

answered on 15 Jul 2011

2 answers

192 views

Sorting a grid bound to a DataTable

Hi,

I have a DataTable with numeric data that is bound to a RadGridView. When I sort a column by clicking the grid's header it is sorted by that column which is correct. The problem is that the sort applied to the column is a string sort and I would like it to sort numerically. I looked in the grid documentation under Sorting to no avail. Could you please tell me how this is done?

Best Regards,
Jose

GridView

answered on 15 Jul 2011

9 answers

116 views

GridViewDataColumn bound to a non primitive type raises exceptions internally

Let DoubleValue be a non primitive type wrapping a double, with a TypeConverter attached that knows how to convert it from/to a Double, and suppose a GridViewDataColumn is bound via DataMemberBinding to a property of this type. Editing the value causes an InvalidCast exception, from String to DoubleValue, in GridViewDataControl.OnKeyDown. Although the exception is captured internally, it is still visible in the Output window of VS.

Going through a ValueConverter in the DataMemberBinding does not make a difference here: the same exceptions are still raised.

The internally raised exceptions are unpleasant and can cause problems with e.g. copy/paste, which I have noted in separate post.

GridView

answered on 15 Jul 2011

6 answers

180 views

Combobox Dropdown Hidden by Dialog

Using a RadComboBox on a UserControl; compiled on Win7 x64 using VS2010 and executed on a WinXP. When the drop down on the combo box is activated the contents is behind the dialog box.

This is limited to a UserControl opened in a RadWindow

RadWindow host = new RadWindow();
host.Content = (new UserControl1());

If the UserControl1 contains a ComboBox then the dropdown appears behind the UserControl1 window.

ComboBox

answered on 15 Jul 2011

1 answer

182 views

Column filtering with .NET's DynamicObject

Greetings,

I've taken an interesting approach to binding in the RadGridView in order to meet some business requirements. Specifically, I'm extending my bound object from System.Dynamic.DynamicObject in order to dynamically "add" properties to the object at run time based on user selection. Here's a simplified version of my bound object:

public class GridItem : DynamicObject, INotifyPropertyChanged

{

public GridItem(DateTime dateTime, decimal value)

{

_dateTime = dateTime;

_value = value;

}

//NOTE: The DateTime property is private forcing the GridView to use the DynamicObject implementation...

private readonly DateTime _dateTime;

private DateTime DateTime

{

get { return _dateTime; }

}

//NOTE: The Value property is private forcing the GridView to use the DynamicObject implementation...

private decimal _value;

private decimal Value

{

get { return _value; }

set

{

_value = value;

OnPropertyChanged("Value");

}

public override bool TryGetMember(GetMemberBinder binder, out object result)

{

result = null;

switch (binder.Name)

{

case "DateTime":

result = DateTime;

break;

case "Value":

result = Value;

break;

}

return true;

}

public override bool TrySetMember(SetMemberBinder binder, object value)

{

switch (binder.Name)

{

case "Value":

decimal result;

if(decimal.TryParse(value.ToString(), out result))

{

Value = result;

}

break;

}

return true;

}

private static readonly IEnumerable<string> _members =

new List<string>() { "DateTime", "Value" };

public override IEnumerable<string> GetDynamicMemberNames()

{

return _members;

}

public event PropertyChangedEventHandler PropertyChanged;

private void OnPropertyChanged(string propertyName)

{

if (PropertyChanged == null)

return;

PropertyChanged(this, new PropertyChangedEventArgs(propertyName));

}

I add the items to my GridView using:

this.GridView.ItemsSource =

new List<GridItem>()

{

new GridItem(DateTime.Parse("1/1/2009"), 10.9m),

new GridItem(DateTime.Parse("3/31/2010"), 11.4m),

new GridItem(DateTime.Parse("5/1/2011"), 12.5m),

};

And my Grid is defined as such:

<Telerik:RadGridView x:Name="GridView" AutoGenerateColumns="False">

<Telerik:RadGridView.Columns>

<Telerik:GridViewDataColumn UniqueName="DateTime" Header="Date/Time"

DataMemberBinding="{Binding DateTime}" IsReadOnly="True"

DataType="{x:Type System:DateTime}" IsFilterable="True" />

<Telerik:GridViewDataColumn UniqueName="Value" Header="Value"

DataMemberBinding="{Binding Value}" DataType="{x:Type System:Decimal}"

IsFilterable="True" />

</Telerik:RadGridView.Columns>

</Telerik:RadGridView>

The approach works great for binding; however, the column filtering does not work. It seems to be broken when there's not a public property exposed.

I'm using the Q3/2010 Telerik controls.

Any help or work around would be appreciated. We must have column filtering.

Thanks a bunch.

GridView

answered on 15 Jul 2011

1 answer

221 views

How to change default Filter drop down value to specific e.g "Contains"

Hi
In gridview filter option you can see drop down always start with "Is Equal To" is it possible to change to "Contains", i do not want to do any custom filters as i like inbuilt filters and just want to change filter drop down option to selected " Contains " option only, so if i want to filter something in column i just enter value and press "Filter" button and filter will filter value based on "Contains" option.

Kind Regards:

GridView

answered on 15 Jul 2011

3 answers

132 views

GridViewComboBoxColumn: howto check ItemsSource Property

Hi there,
I have a GridViewComboBoxColumn in a nested hierarchical GridView, but somehow I can't set ItemsSource, DataMemberBinding and SelectedValueMemberPath properly from XAML. So, is there a simple way to find out, which ItemsSource is really set in the nested Grid at runtime, in order to fix the other props?
btw, my error looks like

BindingExpression path error: 'Name' property not found on 'object' ''Char' (HashCode=5177423)'. BindingExpression:Path=Name; DataItem='Char'

Cheers,
Hermann

GridView

answered on 15 Jul 2011

5 answers

261 views

What should be the width for column of RadGridView ?

I am using wpf 4.0 and telerik (3rd party tool) in my application and in which using grid of telerik.Now in my application there is a requirement that if the screen resolution gets bigger than 1024*768 then the columns width should increase.So i gave column width as star (*).

But in case of more than 20 columns in one grid................all the columns get collapsed with each other and though I have done the ScrollBar visibility as auto...............I dont see the scroll bar.So kindly tell me what should be the correct way to define width for the column.

GridView

answered on 15 Jul 2011

2 answers

62 views

Data Binding Problem

I want to binding SumFunction with a textblock. But I don`t how to do it. Here is my XMAL Code:

telerik:GridViewDataColumn Header="Amount" UniqueName="Amount" DataMemberBinding="{Binding Amount}">
<telerik:GridViewDataColumn.AggregateFunctions>
<telerik:SumFunction x:Name="MyTotal" Caption="Sum:" SourceField="Amount" />
</telerik:GridViewDataColumn.AggregateFunctions>
</telerik:GridViewDataColumn>

<TextBlock Height="23" HorizontalAlignment="Right" Margin="0,28,98.377,0" x:Name="textBlock1" Text="{Binding "Need something to do", ElementName=radGridView1}" VerticalAlignment="Top" TextInput="textBlock1_TextInput" Width="79" d:LayoutOverrides="VerticalAlignment" />

thank`s for Help

GridView

answered on 14 Jul 2011

13 answers

306 views

RadTreeListView.ScrollIntoView doesn't works

Hi,

I faced with a problem that RadTreeListView.ScrollIntoView() doesn't works at all.

I need your support or workaround if so exist asap.

Thank you in advance,
Julian

TreeListView

answered on 14 Jul 2011