user control - WPF Discussion Boards

MemberDotNetting4-May-12 22:22

4-May-12 22:22

Hi,

i have a wpf user control wich allow me to show print window .

how can i show wpf user control when i click on button in another window??

Re: add wpf user control

Abhinav S5-May-12 21:40

Abhinav S

5-May-12 21:40

Place it in a window and display it on button click.

private void myButton_Click(object sender, EventArgs e)
{
    Window myWindow = new Window
    {
        Content = new myUserControl()
    };
    window.ShowDialog();
}

WPF DataGrid cell click

LAPEC4-May-12 1:06

LAPEC

4-May-12 1:06

Hello Everyone

I have this slight problem maybe someone can help me please...

I have created a WPF project on VS2010. In this project I have a window with one DataGrid (on the left side of the window), seven TextBoxes, two ComboBoxes and one CheckBox (on the right side of the window).
When I run application, on the DataGrid I display only the name of employee from the database.

My Question:
How can I display all the details of the employee in the textboxes, comboboxes, and checkbox when I click on the cell of the datagrid?
Could someone help me on this please I'm new to WPF...

Kind Regards to everyone

Lapeci

Re: WPF DataGrid cell click

Erik Rude4-May-12 1:31

Erik Rude

4-May-12 1:31

You could consider presenting your data in a ListBox or a ListView and set IsSyncronisedWithCurrentItem="True" using the autamatic Parent Child binding in WPF.

Re: WPF DataGrid cell click

LAPEC4-May-12 1:51

LAPEC

4-May-12 1:51

Is any way to do it with datagrid rather then with listbox, and is it possible to show me with some sample code according to my question please...

kind regards

lapeci

Re: WPF DataGrid cell click

Erik Rude4-May-12 2:46

Erik Rude

4-May-12 2:46

I don't know any quick way to do it with Grid, but you can get a very similar look by using a list view - maybe something along these lines: Other than that wait for some one else to come up with the answer. Or read up on Binding.

<ListView Name="lvwCommandLog" 
                  ItemsSource="{Binding Path=CommandLog, Mode=TwoWay}" 
                  MouseDoubleClick="lvwCommandLog_MouseDoubleClick" 
                  ToolTip="Double click to run this command again" >
            <ListView.View >
                <GridView >
                    <GridViewColumn Header="Name" DisplayMemberBinding="{Binding Name, Mode=TwoWay}" ></GridViewColumn>
                    <GridViewColumn Header="Age" DisplayMemberBinding="{Binding Age}" ></GridViewColumn>
                    <GridViewColumn Header="Time" DisplayMemberBinding="{Binding Path=Time, StringFormat=\{0:h\\:mm\\:ss\}}"></GridViewColumn>
                </GridView>
            </ListView.View>
            <ListView.ContextMenu>
                <ContextMenu>
                    <MenuItem Header="Do Something" Click="MenuItem_Click" />
                </ContextMenu>
            </ListView.ContextMenu>
        </ListView>
        <Text Text="{Binding Name}"/>

Re: WPF DataGrid cell click

Jeremy Hutchinson4-May-12 2:46

Jeremy Hutchinson

4-May-12 2:46

There are two ways to do this:
1. Bind the DataGrid's SelectItem to a property in your ViewModel (or code behind if you're not using MVVM Frown | :(

), then in the setter for that property populate properties for the TextBoxes, ComboBoxes etc.

This method has the advantage of being able to add a Cancel button.

2. Bind the TextBoxes, ComboBoxes etc to the DataGrid's SelectedItem property. Something like this:

XML

{Binding ElementName=DataGrid1, Path=SelectedItem.TextPropertyName}

This method saves you a bit of coding but doesn't offer an easy way to cancel changes.

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user control

MemberDotNetting3-May-12 13:40

MemberDotNetting

3-May-12 13:40

I create a library of these classes contains a user control that contains images as background to some button, I add it to the main page such as referance, I added this code to retrieve the control xaml user

XML

<Window x: Class = "WpfApplication3.MainWindow"
         xmlns = "http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns: x = "http://schemas.microsoft.com/winfx/2006/xaml"
         Title = "MainWindow" Height = "350" width = "525"
          xmlns: usercontrol = "clr-namespace: usercontrol; assembly = usercontrol">
     <Grid>
         <usercontrol:myeditor> </ usercontrol: myeditor>
     </ Grid>
</ Window>

but i get an exception: the user control Cannot locate resource Sniff | :^)

Re: user control

Jeremy Hutchinson4-May-12 2:34

Jeremy Hutchinson

4-May-12 2:34

What are the values of the 'Build Action' and 'Copy to Output' properties of the background image (right click - properties)?

What does the xaml (or code) look like for assigning the image as the background of the UserControl look like?

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Re: user control

Alisaunder6-May-12 2:23

Alisaunder

6-May-12 2:23

Your error is going to be in the myeditor usercontrol. Like Jeremy suggested check to ensure that your image sources on the control are correct, and that the control is able to locate them during runtime.

How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#3-May-12 4:02

Rocky#

3-May-12 4:02

Hi guys,

I'm working for the first time in WPF with MVVM pattern and I have a datagrid that is populated according to search terms in textbox on top. Right now, I'm able to populate the grid with all the data but I'm not able to get the value of the TextBox so I can filter it.

So here's a bit of the code:

In ViewModel:

private string p_searchName;
public string _searchName
        {
            get
            {
                return p_searchName;
            }
            set
            {
                p_searchName = value;

                base.RaisePropertyChanged(&quot;_searchName&quot;);
            }
        }

In xaml file

<TextBox Height="23" HorizontalAlignment="Left"  Margin="2,45,0,0" Text="{Binding _searchName}" 
                         Name="tb_SearchName" VerticalAlignment="Top" Width="99" FontFamily="Lucida Console" TabIndex="10" 
                         Grid.Column="1" />

Any help is greatly appreciated!

Thanks

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Jeremy Hutchinson3-May-12 5:30

Jeremy Hutchinson

3-May-12 5:30

The binding looks right, but are there any errors in the output window when loading that form?

The other thing that it may be, is that the TextBox control doesn't update the ViewModel until it loses focus. Not sure about that though...

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Re: How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#3-May-12 20:42

Rocky#

3-May-12 20:42

There are no errors in the output window. But you are quite right about the focus. I just added

UpdateSourceTrigger=PropertyChanged

like this

<TextBox Text="{Binding Name, UpdateSourceTrigger=PropertyChanged}"/>

and it actually works... But I really don't see why this is so.

Thanks for the help!

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Jeremy Hutchinson4-May-12 1:48

Jeremy Hutchinson

4-May-12 1:48

I assume the default for UpdateSourceTrigger is LostFocus, and it is set that way for performance reasons. Every time you call the setter, the setter raises the OnPropertyChanged event, WPF listens to that event and calls the getter.

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Re: How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#4-May-12 3:05

Rocky#

4-May-12 3:05

Hmm.. thanks Jeremy! Smile | :)

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Mycroft Holmes3-May-12 12:46

Mycroft Holmes

3-May-12 12:46

Make your binding Mode="TwoWay" default is only one way so you see the data but are not telling the datacontext the data has changed

And yes the change is only notified when the user leaves the textbox

Never underestimate the power of human stupidity
RAH

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#3-May-12 20:19

Rocky#

3-May-12 20:19

Tried that too, didn't work unfortunately. Frown | :(

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Pete O'Hanlon3-May-12 20:29

Pete O'Hanlon

3-May-12 20:29

You need to set your UpdateSourceTrigger in your binding like this <TextBox Text="{Binding MyProperty, UpdateSourceTrigger=PropertyChanged}"/>

*pre-emptive celebratory nipple tassle jiggle* - Sean Ewington

"Mind bleach! Send me mind bleach!" - Nagy Vilmos

CodeStash - Online Snippet Management | My blog | MoXAML PowerToys | Mole 2010 - debugging made easier

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#3-May-12 20:43

Rocky#

3-May-12 20:43

Yes you're right. Just did that a minute ago or so Smile | :)

By the way... do you know why this is so? Just curious!

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Wayne Gaylard3-May-12 21:09

Wayne Gaylard

3-May-12 21:09

The WPF textbox has a default UpdateSourceTrigger of LostFocus, which means that it only updates it's bound value when the user focuses on another control. By changing the trigger to update when the property changes, it updates it's bound value every time the user enters/deletes/changes a letter. Here is the MSDN page that discusses this How to: Control when the TextBox Text Updates the Source[^] .

Hope this helps

When I was a coder, we worked on algorithms. Today, we memorize APIs for countless libraries — those libraries have the algorithms - Eric Allman

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Rocky#4-May-12 3:04

Rocky#

4-May-12 3:04

I see, thanks Wayne!

Rocky

My Blog

Re: How to get the value of textbox in ViewModel in WPF - MVVM

Wayne Gaylard4-May-12 20:22

Wayne Gaylard

4-May-12 20:22

Great, Glad it helped Smile | :)