[Solved] Getting at the selected item data in a GridView

[scott]

I have a RadGridView with an ItemsSource set to a DataTable from Vlad's data table class.  Thanks Vlad :)  Anyway, elsewhere I have a button.  Clicking the button means I have to get a field from the selected grid view record and do something with it, but I don't know how to reference the data fields.  The selected item appears to be of type DynamicObject.  I can see the fields, but I don't know how to get them.  For example, I want the string "11" from ObjID in the selected row.

string objid = // what ?

This is a view from my locals window in the debugger:

+  selectedRow {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5} object {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5}
-  obj {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5} Telerik.Data.DynamicObject {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5}
-  [DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5] {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5} DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5
+  base {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5} Telerik.Data.DynamicObject {DynamicObjectBuilder_c0987842-f929-4dad-aaf9-329941d0cae5}
  CreateDate "2010-07-08T05:24:10.54-04:00" string
  ModifyDate "2010-07-19T10:20:34.503-04:00" string
  ObjID "11" string

[Milan]

Hi scott,

you can cast SelectedItem to DynamicObject and them use the GetValue method to obtain the desired property value.

var selectedItem = this.RadGridView1.SelectedItem as DynamicObject;
var propertyValue = selectedItem.GetValue<int>("ID");

All the best,
Milan
the Telerik team

[scott]

Hi Milan - that doesn't compile

Error 1 'Telerik.Data.DynamicObject.GetValue<T>(string)' is inaccessible due to its protection level 

Maybe there's a change I can make in Vlad's DynamicObject class ?

namespace Telerik.Data
{
    public abstract class DynamicObject : INotifyPropertyChanged
    {
        private readonly Dictionary<string, object> valuesStorage;
        public event PropertyChangedEventHandler PropertyChanged;

        protected DynamicObject()
        {
            this.valuesStorage = new Dictionary<string,object>();
        }

        protected internal virtual T GetValue<T>(string propertyName)
        {
            object value;
            if (!this.valuesStorage.TryGetValue(propertyName, out value))
            {
                return default(T);
            }
            return (T) value;
        }

        protected internal virtual void SetValue<T>(string propertyName, T value)
        {
            this.valuesStorage[propertyName] = value;
            this.RaisePropertyChanged(propertyName);
        }

        protected void RaisePropertyChanged(string propertyName)
        {
            this.OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
        }

        protected virtual void OnPropertyChanged(PropertyChangedEventArgs args)
        {
            var hanlder = this.PropertyChanged;
            if (hanlder != null)
            {
                hanlder(this, args);
            }
        }
    }
}

Scott

[scott]

I found this previous forum post - and that technique still works ....

http://www.telerik.com/community/forums/silverlight/gridview/how-do-you-access-the-underlying-object-in-the-gridview.aspx

Scott

[Hıncal]

I added below code to DynamicObject.cs file

public virtual T GetVal<T>(string propertyName)
        {
            object value;
            if (!this.valuesStorage.TryGetValue(propertyName, out value))
            {
                return default(T);
            }
            return (T)value;
        }

 

 

 

and then
 

 

 

var selectedItem = this.RadGridView1.SelectedItem as DynamicObject;
var propertyValue = selectedItem.GetVal<int>("ID");

works again ;o)))