I have a situation where I'd like to provide the user with some common values to select for a column in a GridView, based on the value of another column that exists in the row. I know this can be done with the AutoComplete mode on the column. The problem is that I'd also like to allow them to add a new value that doesn't appear in the list if they want. Is there a way to allow the user to enter a custom value with the GridViewMultiComboBoxColumn or am I going about this all wrong?

Any pointers in the right direction would be greatly appreciated. Thanks!

Hello,
I am trying to figure out the INotifyPropertyChangd interface for using a Binding list with a grid. I CRUD my data to the database with code and display in the grid but I have to call a method to load the data into the grid every time I make a change. I am missing something to bind my data to the grid whenever a change is made. I created some small demo files and have looked at multiple examples but am still having problems figuring the link between the db and the grid. Below is what I have created to help understand the concept. One thing to note is that I am creating my data table using ORM fluent mapping in code.

​ //public class _Student
public class _Student : System.ComponentModel.INotifyPropertyChanged
{
private int id;
private string name;
private string grade;

public int Id
{
get { return id; }
set
{
id = value;
this.OnPropertyChanged("Id");
}
}

public string Name
{
get { return name; }
set
{
name = value;
this.OnPropertyChanged("Name");
}
}

public string Grade
{
get { return grade; }
set
{
grade = value;
this.OnPropertyChanged("Grade");
}
}

private void OnPropertyChanged(string PropertyName)
{
this.OnPropertyChanged(new PropertyChangedEventArgs(PropertyName));
}

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

public event PropertyChangedEventHandler PropertyChanged;


//Mapping.
internal static MappingConfiguration<_Student> StudentMapping()
{
var config = new MappingConfiguration<_Student>();
config.MapType(x => new
{
Name = x.Name,
Grade = x.Grade,
}).ToTable("Student");
config.HasProperty(p => p.Id).IsIdentity(KeyGenerator.Autoinc);
config.HasProperty(p => p.Name).IsNotNullable().IsUnicode().HasLength(50);
config.HasProperty(p => p.Grade).IsNullable().IsUnicode().HasLength(50);
return config;
}
}

public class _vmstudent
{
//INSERT.
public static void InsertNewStudentInfo(BindingList<_Student> stud)
{
using (ProjectSpecSqlFluentContext db = new ProjectSpecSqlFluentContext())
{
foreach (var item in stud)
{
if (!db._Students.Any(x => x.Name.Equals(item.Name)))
{
_Student s = new _Student
{
Name = item.Name,
Grade = item.Grade
};
db.Add(s);
}
}
db.SaveChanges();
}
}

//UPDATE.
public static void UpdateStudentInfo(int Id, string BestGrade)
{
using (ProjectSpecSqlFluentContext db = new ProjectSpecSqlFluentContext())
{
if (db._Students.Any(x => x.Id.Equals(Id)))
{
_Student s = db._Students.Single(x => x.Id.Equals(Id));
s.Grade = BestGrade;
db.SaveChanges();
}
}
}

//READ.
public static BindingList<_Student> ReadStudentInfo()
{
BindingList<_Student> list;
using (ProjectSpecSqlFluentContext db = new ProjectSpecSqlFluentContext())
{
var result = (from s in db._Students
select new _Student
{
Id = s.Id,
Name = s.Name,
Grade = s.Grade
}).ToList();
list = new BindingList<_Student>(result);
}
return list;
}

//DELETE.
public static void DeleteStudentInfo(int Id)
{
using (ProjectSpecSqlFluentContext db = new ProjectSpecSqlFluentContext())
{
if (db._Students.Any(x => x.Id.Equals(Id)))
{
_Student s = db._Students.FirstOrDefault(x => x.Id.Equals(Id));
db.Delete(s);
db.SaveChanges();
}
}
}
}


public partial class StudentForm : Telerik.WinControls.UI.RadForm
{
private BindingList<_Student> student;

public StudentForm()
{
InitializeComponent();

////Default schema.
//vmSchema.AddDefaultTableInfo();

this.radGridView1.DataSource = _vmstudent.ReadStudentInfo();

this.rbtnAdd.Click += rbtnAdd_Click;
this.rbtnDelete.Click += rbtnDelete_Click;
this.rbtnBestGrade.Click += rbtnBestGrade_Click;
}

//ADD...
void rbtnAdd_Click(object sender, EventArgs e)
{
student = new BindingList<_Student>();
student.Add(new _Student { Id = 0, Name = "Peter", Grade = "A" });
student.Add(new _Student { Id = 0, Name = "John", Grade = "B" });
student.Add(new _Student { Id = 0, Name = "Tony", Grade = "C" });
student.Add(new _Student { Id = 0, Name = "David", Grade = "D" });

_vmstudent.InsertNewStudentInfo(student);
this.radGridView1.DataSource = _vmstudent.ReadStudentInfo();
}


//BEST GRADE...
void rbtnBestGrade_Click(object sender, EventArgs e)
{
int index = this.radGridView1.Rows.IndexOf(radGridView1.CurrentRow);
string id = this.radGridView1.Rows[index].Cells["Id"].Value.ToString();

_vmstudent.UpdateStudentInfo(Convert.ToInt16(id), txtBestGrade.Text);
this.radGridView1.DataSource = _vmstudent.ReadStudentInfo();
}

//DELETE..
void rbtnDelete_Click(object sender, EventArgs e)
{
int index = this.radGridView1.Rows.IndexOf(radGridView1.CurrentRow);
string id = this.radGridView1.Rows[index].Cells["Id"].Value.ToString();

_vmstudent.DeleteStudentInfo(Convert.ToInt16(id));
this.radGridView1.DataSource = _vmstudent.ReadStudentInfo();
}
}

Your help would be appreciated.

Thanks

Gavin

I have a winform app that is using Telerik RadGridView. It has several GridViewTemplate and in 1 of the GridViewTemplate I want to have self reference relation, so my question is
- can I cast GridViewTemplate to RadGridView so I use
         RadGridView.Relations.AddSelfReference
- or can have some way that I can use directly
         GridViewTemplate.Relations.AddSelfReference

Thanks.
Tom

VB.Net in VS2010.
I have a scheduler that's in a RadForm that is an MDI child inside a RadDock on the parent form, which is also a RadForm. The mouse wheel does not work in the scheduler. If I put a scheduler on a non MDI form the mouse wheel does work. Do you have any suggestions as to where I can look for the problem? It has been like this since the 2012 version of Telerik Controls and I just updated to 2014.1.226.40 hoping the problem would be solved.

Can I put the custom control (treeview with checkbox) inside the GridViewTemplate. I have the .Net winform, which is using the Rad GridView, display the customer information, when user click on that customer, the sub templates will open (3 tabs), I coded for 2 tabs which display detail information. I want to code the last tab display the treeview with checkbox in it and user can select checkbox to turn on or off the options they want to use.
Thanks.

How can I turn off the selected record arrow in the MultiColumn ComboBox.  I am using a custom theme.

Thanks.

Hi,
In my quick review of controls encounter a problem with export to PDF from your RichTextBox. When i type something in cyrilic and then save as PDF file the result is quite strane. I mean many random spaces and generally weird layout. You can easy reproduce this in the winforms demo application. So, is it some kind of bug or there is a way to change this behavior in the code?
Best Regards,
Slavcho

I'm working on developing our own theme, based on the WPF windows 8 theme. I have an issue with contextual ribbon bars. My guess is that these can't be themed in the Visual Builder. However, I can't work out how to theme them in code either.

This is what we currently have


What I would like to do is 
1 - Theme the ribbontabbutton; the background colour, border and text. I can change the unselected background colour of the tab, but this only has an affect until the first time the ribbon is selected. Once switching away, the colour reverts to white. I also can't work out how to change the selected colour at all, which is what I really want to do

2 - Remove the colouring on the main panel area that contains the groups etc. I just want it to be white.

3 - Would be nice to change the unselected colour of the contextual ribbontabbutton as well (want it a shade of the orange, but that's not so important

Any help would be greatly appreciated.

Thanks
Jason

I recently started using visual style builder and I must say I love it.  Definitely a little learning curve but very reasonable given its impressive capabilities.  I was able to get my custom theme working in my application with little trouble.  However, I can't get it working on a non-dev computer at all.  I have deployed multiple applications using your awesome suite, both web and windows, never having any difficulty.  I set all telerik dependencies to copy local and copy the full release folder to the target computer.  When I run the .exe, I get either nothing at all or maybe eventually the error saying "this application has stopped working".  I even tried copying the theme .xml files to the target machine but still no joy.  I have searched and come up empty so here I am.  Please let me know if I can provide any screenshots, assemblies, etc to make my issue clearer.

http://www.telerik.com/help/winforms/gridview-grouping-group-aggregates.html

GroupDescriptor descriptor = new GroupDescriptor();
descriptor.GroupNames.Add("ShipName", ListSortDirection.Ascending);
descriptor.Aggregates.Add("Count(ShipName)");
descriptor.Aggregates.Add("Max(Freight)");
descriptor.Aggregates.Add("Avg(Freight)");
descriptor.Format = "The ship {1} has {2} item(s) with maximum freight {3} and avarage freight of {4:c2} per ship.";
this.radGridView1.GroupDescriptors.Add(descriptor);

How to do sort by Max (descriptor.Aggregates.Add("Max(Freight)");)
How to do ability to let Antonio Moreno Taqueria(max 84.84) is first ,Alfreds Futterkiste (max 69.53) is second ,Ana Trujillo Emparedados y helados (max 43.9) is third.