Application crashing when using <Run Text={Binding ...}/> with certain properties in a textblock

Question

I am using <Run Text={Binding ...}/> inside a TextBlock in order to concatenate 2 strings (one which is hard coded, the other one is a binding expression on a property). This is being done in a DataTemplate :

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <DataTemplate x:Key="MarketOrderDataTemplate">
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="30*"/>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="70*"/>
            </Grid.ColumnDefinitions>

            <!-- Item icon TODO: Add Icon-->
            <Image Grid.Column="0" Margin="10,0,10,0"  Stretch="Fill" Source="../../Images/thumb_icon-mineral-protoss.png" />

            <Separator Grid.Column="1" Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />

            <!-- Item information -->
            <Grid Grid.Column="2" Margin="10,0,10,0" HorizontalAlignment="Center">
                <Grid.RowDefinitions>
                    <RowDefinition Height="33*"/>
                    <RowDefinition Height="33*"/>
                    <RowDefinition Height="33*"/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <TextBlock Grid.Row="0">
                    <Run Text="Item Name : "/>
                    <Run Text="{Binding Item.ItemName}"/>
                </TextBlock>
                <TextBlock Grid.Row="1">
                    <Run Text="Item ID : "/>
                    <Run Text="{Binding Item.ItemID}"/>
                </TextBlock>
                <TextBlock Grid.Row="2">
                    <Run Text="Item Type : "/>
                    <Run Text="{Binding Item.ItemType}"/>
                </TextBlock>
            </Grid>

            <Separator Grid.Column="3" Style="{StaticResource {x:Static ToolBar.SeparatorStyleKey}}" />

            <!-- Market order information -->
            <Grid Grid.Column="4" Margin="10,0,10,0" HorizontalAlignment="Center">
                <Grid.RowDefinitions>
                    <RowDefinition Height="33*"/>
                    <RowDefinition Height="33*"/>
                    <RowDefinition Height="33*"/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"/>
                </Grid.ColumnDefinitions>

                <TextBlock Grid.Row="0">
                    <Run Text="Market Order ID : "/>
                    <Run Text="{Binding OrderID}"/>
                </TextBlock>
                <TextBlock Grid.Row="1">
                    <Run Text="Price : "/>
                    <Run Text="{Binding Price}"/>
                </TextBlock>
                <TextBlock Grid.Row="2">
                    <Run Text="Volume Remaining : "/>
                    <Run Text="{Binding VolumeRemaining}"/>
                </TextBlock>
            </Grid>
        </Grid>
    </DataTemplate>

</ResourceDictionary>

This works in the Item Information part of my DataTemplate (with bindings on Item.ItemName, Item.ItemID, Item.ItemType) without any problems. When I try to do the same with the Market Order Information part of my DataTemplate (with bindings on OrderID, Price, VolumeRemaining) though, it makes the application crash for some reason.

It works well if I just set the Textproperty on my TextBlock with the same binding expression, but I do not know why it makes the application crash with the <Run Text={Binding ...}/> syntax on the Market Order Info part?

dkozl · Accepted Answer · 2015-05-14 21:47:57Z

4

You did not show your view model or the error so I can only suspect that it's because your property is read-only and Run by default bind both ways. Change binding to OneWay

<Run Text="{Binding VolumeRemaining, Mode=OneWay}"/>

answered May 14, 2015 at 21:47

dkozl

33.4k8 gold badges89 silver badges92 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Choub890 Over a year ago

This worked, but I do not have a readonly property in my viewmodel. OrderID is a uint, Price is a float and VolumeRemaining is a uint.

dkozl Over a year ago

Type does not matter. What matters is do these properties have public setter as well as getter? In order for property to be bound both ways it must have public getter and setter

Choub890 Over a year ago

They did not have setters, that's why! Thanks for your help!

Collectives™ on Stack Overflow

Application crashing when using <Run Text={Binding ...}/> with certain properties in a textblock

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related