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1 answer
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I am using the built-in drag and drop service.   I have 3 grids.   

 

I am implementing it so I can drag and drop Grid 2 rows onto rows of either Grid 1 or Grid 2.

 

I have no problem of dragging the Grid 2 Rows to a row in Grid 1.  All is working fine.

However if I drag rows from Grid 2 to Grid 3, I cannot get the svc_PreviewDragDrop event to trigger.  It will trigger if I drop it on the grid in general, but not if I drop it on a row in Grid 3.  

 

Cannot figure out what I am doing wrong.  

 

Thank you

 

Nadya | Tech Support Engineer
Telerik team
 answered on 04 Jan 2021
1 answer
122 views

I would like to select all rows based on the text typed in the search box or create a collection  of rows that contain the search text. 

 

For example if the user types 'cat" into the search box. is there a way to auto select those rows so the user could drag and drop.  I have the drag and drop working for selected rows, just wanted a new way  in selecting rows.   

 

Nadya | Tech Support Engineer
Telerik team
 answered on 04 Jan 2021
2 answers
239 views

For a SelectionChanged event in a hierarchical RadGridView, how do I test to determine which template had a row selection change?

James
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Veteran
 answered on 04 Jan 2021
3 answers
164 views

Hi.

I have a problem that I could not solve somehow.

I have three CheckedDropDownLists, a button and a gridview.

My goal is to filter the data (List <SomeClass>) linked to the gridview with CheckedDropDownList elements.(I know Gridview has filtering feature and I already use it. But gridview's filtering feature hides data outside of the filter.)

I want to filter the list that I have connected to the Gridview as a data source according to the criteria I have selected with these three CheckedDropDownLists and link the newly created list to the GridView as a data source.

These are simple operations that have thousands of examples on the Internet, and I've already done so far here. 

The main problem is I can't make these three CheckedDropDownLists interactive with each other. When I make a selection on one, I want the other two updated accordingly.

If I have selected 4 company numbers from the CheckedDropDownList, which lists the company number values, the names of these four companies will appear in the CheckedDropDownList, which lists the company names. I want it to show the calculation ID values of these companies in the other CheckedDropDownList that lists the calculation Id values. It seems a little complicated, but I hope I could explain it.

Nadya | Tech Support Engineer
Telerik team
 answered on 04 Jan 2021
1 answer
145 views

I found this thread https://www.telerik.com/forums/binding-to-rangestart-and-rangeend-of-radrangeselector that RadRangeSelector's StartRange and EndRange has been changed when data object changed.

Data object can not change when I change RadRangeSelector's StartRange and EndRange by UI.

Followed as my sample code:

public partial class Form2 : Form
{
    private readonly RangeDataObject dataObject = new RangeDataObject { StartRange = 0, EndRange = 100 };
 
    public Form2()
    {
        this.InitializeComponent();
 
        this.radRangeSelector1.DataBindings.Add(
            new Binding("StartRange", this.dataObject, "StartRange", false, DataSourceUpdateMode.OnPropertyChanged));
        this.radRangeSelector1.DataBindings.Add(
            new Binding("EndRange", this.dataObject, "EndRange", false, DataSourceUpdateMode.OnPropertyChanged));
    }
 
    private void Form2_Load(object sender, EventArgs e)
    {
    }
}
 
public class RangeDataObject : INotifyPropertyChanged
{
    private float startRange;
 
    private float endRange;
 
    public event PropertyChangedEventHandler PropertyChanged;
 
    public float StartRange
    {
        get { return this.startRange; }
        set
        {
            if (this.startRange != value)
            {
                this.startRange = value;
                this.OnPropertyChanged("StartRange");
            }
        }
    }
 
    public float EndRange
    {
        get { return this.endRange; }
        set
        {
            if (this.endRange != value)
            {
                this.endRange = value;
                this.OnPropertyChanged("EndRange");
            }
        }
    }
 
    protected virtual void OnPropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
        {
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}
Peter
Telerik team
 answered on 04 Jan 2021
2 answers
545 views

Hi.
I have a RadGridView that SelectionMode property is set to CellSelect.

Dictionary<int, string> drms = new Dictionary<int, string>();
 
private void ddlSetDurum_SelectedIndexChanged(object sender, Telerik.WinControls.UI.Data.PositionChangedEventArgs e)
        {
            if (ddlSetDurum.SelectedIndex != 0)
            {
                drms.Clear();
 
                foreach (var item in rgvTakip.SelectedCells)
                {
                    int i = item.RowInfo.Index; // Works fine if no column filtering is done
                    if (!drms.ContainsKey(i))
                    {
                        drms.Add(i, rgvTakip.Rows[i].Cells["tkd"].Value.ToString());
                        rgvTakip.Rows[i].Cells["tkd"].Value = ddlSetDurum.SelectedText; 
                    }
                }
                isDurumSet = true;
                ddlSetDurum.SelectedIndex = 0;
            }
        }

 

After filtering by any column, when I try to get the row index of the selected cells, it gives me the index number in the rows created after the filtering process.

When I want to change the value of a cell using the obtained row index, this time it works according to the original table, not the filtered table.

So I have to get the original index number of that cell before filtering.

Nadya | Tech Support Engineer
Telerik team
 answered on 04 Jan 2021
1 answer
181 views

Hi, 

What is the method to clear or reset a layout diagram ?

I have tried the following without success ... 

        LayoutDiagram.DeselectAll()

        LayoutDiagram.Clear()

        LayoutDiagram.UndoRedoService.Clear()

        LayoutDiagram.Refresh()

Issue I am having is if there is a selected shape on the diagram, when I clear/re-add shapes, I am getting a strange side-effect where the shape's manipulation adorner becomes visible but the shape is no longer selectable. It looks like there is some "cache" behind the scenes that isn't clearing ? I would have expected LayoutDiagram.Clear is all I needed to call to reset to a "clean slate" ? Is this so ?

Kind regards,

Milan

 

 

Peter
Telerik team
 answered on 04 Jan 2021
5 answers
227 views

Hello,

I want to use the LoadOnDemand feature of the RadTreeView.

But the NodesNeeded event gets executed on unwanted occasions, such as if I set the form's Enabled property to False, if I use the FindNodes method, or if I refer to the RadTreeview control.

The utility of loading on demand then becomes a defect for me.

It would be good if this event was executed only once, when you want to load the node.

Am I doing something wrong?

Excuse my English. I am Francophone.

Thank you

Nadya | Tech Support Engineer
Telerik team
 answered on 30 Dec 2020
3 answers
2.2K+ views

Hello,
I want to remove a row from the grid, I remove it from the DataSet but it doesn't refresh in the grid. How do I make the grid update after deleting a row in the DataSet?
Is there a better way to do it? Maybe deleting the row in the grid?
What is the best strategy to do it?
I only want to do this in memory, since the update in the database is done with ADO and SQL statements.

Best regards.

 

My code:

            DataRow[] drr = dsHojaCalculo.Tables[0].Select("key_guid = '"+ esteAEliminarGuid+  "' ");
            foreach (var fila in drr)
            {
                fila.Delete();
                dsHojaCalculo.Tables[0].AcceptChanges();
            }

            gridHc.DataSource = null;
            gridHc.DataSource = dsHojaCalculo.Tables[0];



 

 

 

 

 

 

Nadya | Tech Support Engineer
Telerik team
 answered on 30 Dec 2020
1 answer
183 views

I have it mostly working but am having one issue.  I am trying to get the rowinfo in the target grid where the files are dropped.   Grid 1 has a one to many relationship to grid 2.  I am trying to drag data from grid 2 to a different in row in Grid 1.  I want to get the serialID field of the target row in Grid 1, but have not been able to find a way to get that info. 

 

Thank you as always.

Nadya | Tech Support Engineer
Telerik team
 answered on 30 Dec 2020
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