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Hi,
I am working on a silverlight application which deals with RSS feeds. As we cannot directly access RSS feeds of all the websites I wrote a WCF service to get the RSS feeds and then I passed them to the silverlight application.
In this application I have to get the Title, description and Navigation link of each item in the feed. In description I am getting all the Html content in it for description. But I have to get only the text in the description.
I tried to get it like this
rssReader = new XmlTextReader(FeedURL);
SyndicationFeed feed = SyndicationFeed.Load(rssReader);
List<SyndicationItem> feedItems = new List<SyndicationItem>();
foreach (SyndicationItem feedItem in feed.Items)
{
feedItems.Add(feedItem);
}
But for this I am getting error at line:2 as:
The type 'System.Xml.XmlReader' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Xml, Version=2.0.5.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'.
I tried to add System.Xml of Version=2.0.5.0 but I cannot find it in the reference.
If anyone have idea to solve this error or procedure to get only the text in the description node please reply me.
Thanks in advance.
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Below is the code page:
public partial class DataBinding : UserControl
{
public DataBinding()
{
InitializeComponent();
List<PlaylistItem> lstPLI = new List<PlaylistItem>();
for (int i = 0; i < 3; i++)
{
lstPLI.Add(new PlaylistItem("Name" + i.ToString(), "Path" + i.ToString()));
}
lstPlayList.ItemsSource = lstPLI;
}
}
public class PlaylistItem
{
public string FileName;
public string FilePath;
public PlaylistItem()
{
}
public PlaylistItem(string filename,string filepath)
{
FileName = filename;
FilePath = filepath;
}
}
And here is the xaml page:
<UserControl x:Class="FirstSilverLight.DataBinding"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Width="400" Height="300">
<Grid x:Name="LayoutRoot" Background="White">
<ListBox x:Name="lstPlayList">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding FileName}"></TextBlock>
<TextBlock Text="{Binding FilePath}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</UserControl>
The Listbox doesnot show any items in it when I run this, though Listbox items.count is 3 when i debug this. Any idea what the problem is?
s.a.w.
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Make the strings properties instead of fields:
public string FileName { get; set; }
public string FilePath { get; set; }
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://www.codeproject.com/script/Forums/Images/coffee.gif)
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WOW! that solved my problem.
But what i'm still wondering is I have a similar class called 'DirInfo' in my webservice with two string fields(NOT string properties). And when i get List<DirInfo> as return object from its webmethod, I bind it directly to another ListBox. Here it works perfectly without any string properties.
Any idea why this could be?
(FYI: when List<DirInfo> is returned in the <WebMethodeCompletedHandler> its returned in e.Results as System.Collections.ObjectModel.ObservableCollection<DirInfo> object.
Is this anyway related to my question?
)
Thanx again for the help.
s.a.w.
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sunit_82 wrote: when i get List<dirinfo> as return object from its webmethod, I bind it directly to another ListBox. Here it works perfectly without any string properties.
Any idea why this could be?
I can't get that to work.
What does your DirInfo class look like on the client side? Did the proxy class
creation process convert fields to properties?
Mark Salsbery
Microsoft MVP - Visual C++
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<ListBox x:Name="lstPlayList", ItemsSource="{Binding ListName, Mode="TwoWay"}">
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Ok ..i built a simple custom control. A tranparent button. Some of you may have seen it.
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Class="GlassButton"
x:Name="GlassButton" Width="100" Height="30">
<UserControl.Resources>
<ControlTemplate x:Key="GlassButton" TargetType="{x:Type Button}">
<Grid x:Name="OuterGird">
<Rectangle Margin="0,0,0,0" VerticalAlignment="Stretch" StrokeThickness="1" RadiusX="4" RadiusY="4">
<Rectangle.Fill>
<LinearGradientBrush EndPoint="0.369,0.21" StartPoint="0.675,0.774">
<GradientStop Color="#9992C0E8" Offset="0"/>
<GradientStop Color="#FF1E86DC" Offset="1"/>
</LinearGradientBrush>
</Rectangle.Fill>
<Rectangle.Stroke>
<LinearGradientBrush EndPoint="0.382,0.116" StartPoint="0.618,0.884">
<GradientStop Color="#FF2511D8" Offset="0"/>
<GradientStop Color="#FFABCCE8" Offset="1"/>
</LinearGradientBrush>
</Rectangle.Stroke>
</Rectangle>
<TextBox Margin="0,0,0,0" Text="{TemplateBinding Content}" TextWrapping="Wrap" HorizontalAlignment="Center" VerticalAlignment="Center" BorderThickness="0,0,0,0" Foreground="#FFFFFFFF" Background="#00FFFFFF" x:Name="ButtonTextBox"/>
<Path Stroke="{x:Null}" Margin="8,3.712,5.029,8.122" Stretch="Fill" StrokeThickness="0" Data="M167.80889,10.198788 C168.06227,8.3587256 167.20925,7.2831486 165.45782,6.9550772 L19.671443,7.637693 C18.742518,7.708315 15.582248,7.6193257 15.429944,7.5239237 15.429944,7.5239237 12.279116,7.979001 12.279116,7.979001 11.119595,8.2070631 10.356582,9.1665193 9.9996476,10.875024 9.9996476,10.875024 9.8747544,13 9.8747544,13 L9.8557733,52.576677 C10.339993,53.918511 11.067782,54.510987 11.915916,55.079524 12.76405,55.648062 14.503288,55.148249 16.548011,54.66758 18.263785,47.574348 165.59877,4.0491713 167.80889,10.198788 z">
<Path.Fill>
<LinearGradientBrush EndPoint="0.513,1.002" StartPoint="0.517,-0.105">
<GradientStop Color="#B2FFFFFF" Offset="0"/>
<GradientStop Color="#19FFFFFF" Offset="1"/>
<GradientStop Color="#77FFFFFF" Offset="0.382"/>
<GradientStop Color="#33FFFFFF" Offset="0.658"/>
</LinearGradientBrush>
</Path.Fill>
</Path>
</Grid>
</ControlTemplate>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Height="Auto" Width="Auto">
<Button HorizontalAlignment="Stretch" Margin="0,0,0,0" VerticalAlignment="Stretch" Width="Auto" Height="Auto" Content="what" Template="{DynamicResource GlassButton}" Background="#FFD4D0C8" x:Name="BaseButton" BorderThickness="0,0,0,0" />
</Grid>
</UserControl>
I want anyone who uses this control in their WPF project to be able to modify 3 properties on it
a) button text,
B) Button colour and
C) the degree of opacity.
Here in lies the problem i have read that you cannot change the values of a controltemplate. As you can see from the xaml above even the text normally found ontop of a button is held in a textblock deep inside the controltemplate.
Can some one show me how to expose these three properties of the control to a calling program
regards
Erick
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Create a new style, and assigned your template:
<style TargetType="Button">
<Setter Property="Template" Value="{StaticResource GlassButton}" />
</Style>
That should allow you to change your buttons styles i the actual button definitions.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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user from your UserControl-derived class and bind to those properties in the control's
XAML.
Simple example (important changes marked in red):
public partial class GlassButton : UserControl
{
<code>public string ButtonContent { get; set; }
public Brush ButtonFill { get; set; }</code>
public GlassButton()
{
InitializeComponent();
<code>this.DataContext = this;</code>
}
}
<UserControl x:Class="WPFTester.GlassButton"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
>
<UserControl.Resources>
<ControlTemplate x:Key="GlassButton" TargetType="{x:Type Button}">
<Grid x:Name="OuterGird">
<Rectangle Margin="0,0,0,0" VerticalAlignment="Stretch" StrokeThickness="1" RadiusX="4" RadiusY="4" <code>Fill="{Binding ButtonFill}"</code>>
<Rectangle.Stroke>
<LinearGradientBrush EndPoint="0.382,0.116" StartPoint="0.618,0.884">
<GradientStop Color="#FF2511D8" Offset="0"/>
<GradientStop Color="#FFABCCE8" Offset="1"/>
</LinearGradientBrush>
</Rectangle.Stroke>
</Rectangle>
<TextBox Margin="0,0,0,0" Text="{TemplateBinding Content}" TextWrapping="Wrap" HorizontalAlignment="Center" VerticalAlignment="Center" BorderThickness="0,0,0,0" Foreground="#FFFFFFFF" Background="#00FFFFFF" x:Name="ButtonTextBox"/>
<Path Stroke="{x:Null}" Margin="8,3.712,5.029,8.122" Stretch="Fill" StrokeThickness="0" Data="M167.80889,10.198788 C168.06227,8.3587256 167.20925,7.2831486 165.45782,6.9550772 L19.671443,7.637693 C18.742518,7.708315 15.582248,7.6193257 15.429944,7.5239237 15.429944,7.5239237 12.279116,7.979001 12.279116,7.979001 11.119595,8.2070631 10.356582,9.1665193 9.9996476,10.875024 9.9996476,10.875024 9.8747544,13 9.8747544,13 L9.8557733,52.576677 C10.339993,53.918511 11.067782,54.510987 11.915916,55.079524 12.76405,55.648062 14.503288,55.148249 16.548011,54.66758 18.263785,47.574348 165.59877,4.0491713 167.80889,10.198788 z">
<Path.Fill>
<LinearGradientBrush EndPoint="0.513,1.002" StartPoint="0.517,-0.105">
<GradientStop Color="#B2FFFFFF" Offset="0"/>
<GradientStop Color="#19FFFFFF" Offset="1"/>
<GradientStop Color="#77FFFFFF" Offset="0.382"/>
<GradientStop Color="#33FFFFFF" Offset="0.658"/>
</LinearGradientBrush>
</Path.Fill>
</Path>
</Grid>
</ControlTemplate>
</UserControl.Resources>
<Grid x:Name="LayoutRoot" Height="Auto" Width="Auto">
<Button HorizontalAlignment="Stretch" Margin="0,0,0,0" VerticalAlignment="Stretch" Width="Auto" Height="Auto" <code>Content="{Binding ButtonContent}"</code> Template="{DynamicResource GlassButton}" x:Name="BaseButton" BorderThickness="0,0,0,0" />
</Grid>
</UserControl>
Sample usage:
<local:GlassButton ButtonContent="Hey!" >
<local:GlassButton.ButtonFill>
<LinearGradientBrush EndPoint="0.369,0.21" StartPoint="0.675,0.774">
<GradientStop Color="#9992C0E8" Offset="0"/>
<GradientStop Color="#FFFF0000" Offset="1"/>
</LinearGradientBrush>
</local:GlassButton.ButtonFill>
</local:GlassButton>
Mark Salsbery
Microsoft MVP - Visual C++
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Hi,
There's a strange behaviour when using WPF in windows vista:
i want my menu items to be White on the MainMenu of my application, while the children remain regular color.
So i set the Foreground property to white (on the top level)
in vista the child menu items inherit this foreground (!)
I found a reference to it here:
http://journals.tuxreports.com/lch/archives/004031.html[^]
Does any have a solution for that?
Note: when setting all the other item to "Black", i use the feature of opposite color when selecetd, and i don't want to implement it by myself
Thanks,
Yanai
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I think it's a feature.
WPF has theming capabilities and use different default themes on different OSes.
To play with themes, have a look there[^]
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
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Hi and thanks
But i don't understand how is it a feature? and how is the themes gonna help me.
as remembered, all i want to do is color the foreground color of my menu items in white, while the rest will stay default.
and for it to work in XP\Vista\Windows 7
And i can't
does anybody have a solution to that?
Thanks again
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It's the way the menu behave!
How is it done and different depending on the platform in WPF?
Well, WPF ship with a few build-in theme. Aero is the vista look, Luna is the XP look (if I'm right).
Then the theming capabilities of WPF choose the appropriate default look for the OS.
If you want your menu to look always the same you got to either of:
1. fix the theme so that it doesn't change with the OS
2. or simply set up a MenuItem style in your App.config.
Fix the theme will ensure that your app looks the same whatever the UI and will get you a deeper understanding of what's going on. (As writing a them is huge undertaking, better re-us an existing one).
Write a custom MenuItem style is a less general solution (it will only make the menu similar, but the you'll got the same problem for scrollbar, button, combobox, etc.....)
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
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Ok now i see what you mean
I've set my project to work with Luna (XP) only (in the App Resource)
Unfortunatley, it doesn't solve the problem...
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Hi
I get very poor performance when rotating or moving 3d models. At first I thought it might be the TrackBall from the 3DTools library, so I reverted back to using sliders, but I was still getting poor performance. The models lag when rotating and it gets pretty irritating. Also, I'm reading dimensions out of an Access database and then use these dimensions to construct the 3D models, so it might be because of this? I'm only using one connection string.
Is my application staying connected to the database the whole time? Do I need to disconnect somehow?
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You need a profiler utility to let you know where your processing time is too high. Get ANTS.
"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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Okay thanks I'll try ANTs. I used another app called dotTrace, which gave me a snapshot of the running app, showing a lot of processes getting called quite a few times. I thought it might have been these processes and methods causing the lag, but when I ran dotTrace on another app that runs fine, it gave me an almost similar snapshot, so it can't be these specific processes. I'll still try ANTs though.
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Hi,
Am very new to silverlight, and am working on this module where i want to retrieve some data from database, the problem is when i mention column names it dosnt work properly and it gives an error at the return statement....the code is below...
Public Function GetLoginName(ByVal strLogin As String) As List(Of tbl_User) Implements IService1.GetLoginName
Dim db As New DataClasses1DataContext
Dim matchingLogin = From Login In db.tbl_Users Where Login.UserName.StartsWith(strLogin) _
Select Login.UserName, Login.Password
Return matchingLogin
End Function
Can any1 tell me how to achieve it ..
Thanks in advance
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Are you writing this code in Webservice (not Silverlight)? Then, it is not probably Silverlight problem. Never mind, we can still help.
What error are you getting now? What is "strLogin" or What do you have in "db.tbl_Users"?
Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)
Microsoft MVP (Silverlight), WPF/Silverlight Insiders
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Ya you are right am writing this code in web.service, "strlogin" contains the keyword depending on which i have to retrieve data from database. What am trying to do here is retrieve username and password from table tbl_user.
Am getting the following error
Unable to cast object of type 'System.Data.Linq.DataQuery`1[VB$AnonymousType_0`2[System.String,System.String]]' to type 'System.Collections.Generic.List`1[E_Learning.Web.tbl_User]'.
Is there any other way to retrieve data from database without using webservice, am very new 2 silverlight and dont know much about it, any support will be of great help.
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I don't have VB in my VS. But I guess you will need to cast it before returning the object.
Return matchingLogin.ToList()
sunil.n.cs wrote: Is there any other way to retrieve data from database without using webservic
If you are using silverlight-ported object database like db4o or silverlightdb then you can retrieve the data without using any web service. Otherwise, No.
Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)
Microsoft MVP (Silverlight), WPF/Silverlight Insiders
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I already tried casting before returning the object, it works fine until i dont mention any column names in select, if i do mention any column names as in this case den i get the following error when i try to cast.
Value of type 'System.Collections.Generic.List(Of <anonymous type="">)' cannot be converted to 'System.Collections.Generic.List(Of E_Learning.Web.tbl_User)'.
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As Michael said, you need to do:Return matchingLogin.ToList(). The reason you have to do this is because Linq uses a technique called deferred execution (please Google and have a read about this feature), which means that matchingLogin is actually IQueryable(Of tbl_User).
If you think about this, it makes a lot of sense because there are so many different operations that you could perform here on your select that you need to tell it which one you want. For instance, you could return a single row using SingleOrDefault. The onus is on you to tell the query which one you want, hence you use Return matchingLogin.ToList().
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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First of all i would like to thank u guys for the support u have been providing. Now as i mentioned in my last reply i am using deferred execution i.e :Return matchingLogin.ToList()...this will work fine for the query
Dim matchingLogin = From Login In db.tbl_Users Where Login.UserName.StartsWith(strLogin) _
Select Login
Return matchingLogin.ToList()
But when i use column names in select like this one
Dim matchingLogin = From Login In db.tbl_Users Where Login.UserName.StartsWith(strLogin) _
Select Login.UserName, Login.Password
Return matchingLogin.ToList()
it gives me a error in blue underline for matchingLogin.ToList() and when i move the mouse on top it, it says
Value of type 'System.Collections.Generic.List(Of )' cannot be converted to 'System.Collections.Generic.List(Of E_Learning.Web.tbl_User)'.
So to remove this error i have removed .Tolist() from Return
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