Assign dynamic text to a label in wpf in mvvm pattern

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Hi,

I am working on wpf(mvvm) application where i have a label in one form(view) and i want to assign a text dynamically to the label from viewmodel.

Any help?

Posted 16-Oct-13 23:47pm

nm.nagaraju

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Balamurugan1989 · Answer 1 · 2013-10-17T00:02:00

Solution 1

Inside the load event u need to write the code..You just tell me what you have tried....

Posted 17-Oct-13 0:02am

Balamurugan1989

Comments

nm.nagaraju 17-Oct-13 6:05am

Hi, I am doing this in mvvm pattern. There is no events in mvvm pattern.
Thanks..

Balamurugan1989 17-Oct-13 6:18am

Yup...U try in Window_Loaded...

nm.nagaraju 17-Oct-13 6:29am

Window_Loaded event fires when the form loads only, But i want to change the text for every button click.

Balamurugan1989 17-Oct-13 6:35am

http://www.wpftutorial.net/DataBindingOverview.html
go through this link...

Punamchand Dhuppad · Answer 2 · 2013-10-17T00:36:00

Solution 2

For this, You have to add one public property inside the your ViewModel and Implement INotifyPropertyChanged. And Lastly Bind that property to your Label control's Content property.

For example :

1) Inside the ViewModel add property:

C#

private List<string> inputString = new List<string>();
public List<string> InputString
   {
            get
            {
                return inputString;
            }
            set
            {
                inputString= value;
                RaisePropertyChanged("InputString");
            }
    }

2) Bind this property to LableControl :

XML

<Label Content="{Binding Path=InputString}" />

Posted 17-Oct-13 0:36am

Punamchand Dhuppad

Updated 17-Oct-13 17:18pm

v4

Comments

nm.nagaraju 17-Oct-13 7:26am

Hi, How can i assign some text to a label on a button click.

The below is my code

<Label Name="lblCurrentPage" Width="98" Content="{Binding Path=PageOfPage}"></Label>
private string pageofpage;
public string PageOfPage
{
get { return pageofpage; }
set
{
pageofpage = value;
RaisePropertyChanged("pageofpage");
}

}

under some method am assigning text as below
----------------------------------------------

pageofpage = "Page '" + SearchFilter.PageIndex + "' of '" + totalNumberOfPages + "'";

Punamchand Dhuppad 17-Oct-13 8:24am

Instead of assigning value to private variable assign string to Public variable (PageOfPage). So that RaisePropertyChanged("pageofpage") will call.

nm.nagaraju 17-Oct-13 8:50am

Hi I tried what you said, but getting below exception

Property not found
Parameter name: pageofpage

How can i implement INotifypropertyChanged.

Punamchand Dhuppad 17-Oct-13 23:20pm

Please provide public property in RaisePropertyChanged.
It means RaisePropertyChanged("PageOfPage"). I just update my solution, that is my mistake.

Member 10558492 · Answer 3 · 2014-01-29T09:39:00

textbox.Text += inp.ToString();

StringBuilder sb = new StringBuilder;
string sep = "";
for (int i = 0; i <= ymax; i++)
{
inp.Add(i);
sb.AppendFormat("{0}{1}", sep, inp);
sep = ",";
cmbb.ItemsSource = inp;
cmbb.SelectedIndex = 0;
}
textbox.Text = sb.ToString();