Questions on UI for WinForms Forum

3 answers

123 views

Hi,

I have a performance problem.
I load the GridView 2009 Q1 with Tabkeadapter fill method. The Data comes from a view on a ms sql server and contains over 500.000 rows.
The performance is really slow.

What is the best method to give the user the best performance.
Is the Method with the table adapter good?

I thought about only showing about 1000 rows and after applying a filter generating a new query to execute against the db and refill the tableadapter.

Please help,

Thank you very much

GridView

answered on 30 Mar 2009

3 answers

185 views

Drill Down with binding to custom object

Hi,

I've got a question on how best to accomplish drill down on a grid. The basic user experience should be to load up the form with a grid, and then click on any row's down arrow and see the grid expand to view related records (heirarchical grid).

I've currently got it working by creating 2 lists and setting up the relationship between them. What I'm wondering is if it's possible to set it up so that I can call the child object in the datasource to be the sub grid.

eg
Order has a property called 'OrderItems' which contains a list of all order items. In order to display on a grid, I need to call seperately a 'GetOrders' and a 'GetOrderItems', and then put the two together.

How would I get the grid to use Order.OrderItems as a data source instead? I suspect it would have to be an unbound grid, which is OK, but then I just need to know how to create a hierarchical unbound grid! Potentially it'd be nice to automatically generate a sub grid based on the properties of a sub object.

GridView

answered on 30 Mar 2009

9 answers

632 views

Change Column Item to Combobox

Hi!
I'm trying to change a standart column to a combobox Column.
My way is to remove the original column with:

    
            RadGridSubstances.Columns.Remove(RadGridSubstances.Columns("uzs_PosNeg"))

and add a new GridViewComboBoxColumn with:

    
            Dim comboBoxColumn As New GridViewComboBoxColumn 
        
            comboBoxColumn.HeaderText = "positiv/negativ" 
        
            comboBoxColumn.FieldName = "uzs_PosNeg" 
        
            comboBoxColumn.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList 
        
             ' Create Custom Table for Combobox 
        
            Dim comboDT As New DataTable 
        
            comboDT.Columns.Add("Name", GetType(System.String)) 
        
            comboDT.Columns.Add("Wert", GetType(System.Int16)) 
        
            Dim myNewRow As DataRow = comboDT.NewRow() 
        
            myNewRow("Name") = "positiv" 
        
            myNewRow("Wert") = 1 
        
            comboDT.Rows.Add(myNewRow) 
        
            Dim myNewRow2 As DataRow = comboDT.NewRow() 
        
            myNewRow2("Name") = "negativ" 
        
            myNewRow2("Wert") = 0 
        
            comboDT.Rows.Add(myNewRow2) 
        
            comboBoxColumn.DataSource = comboDT 
        
            comboBoxColumn.ValueMember = "Wert" 
        
            comboBoxColumn.DisplayMember = "Name" 
        
            comboBoxColumn.FieldName = "uzs_PosNeg" 
        
            RadGridSubstances.Columns.Add(comboBoxColumn)

At least I have two columns one with the Headertext "uzs_PosNeg" and one with the Headertext "positiv/negativ" (the ComboBoxColumn) When I change the Value in the Combobox (and change the row) - the value in the other column changes and the Combobox displays nothing.

How could I do this? Is there an easyer way to assign two values to the combobox instead of creating a Datatable?

regards
Willi

GridView

answered on 30 Mar 2009

1 answer

116 views

WinForms GridView

hi telerik,

I am working on winforms version Q2 2008 SP1 using a GridView control with one

imageCOlumn and three textboxColumns and a image list in that i have four images. I am using a

BindingList to bind the Grid, when i load the Grid initially it should not show image in the

imageColumn and all other textboxColumns gets filled with data.

Now, how can i fill the imageColumn of the Grid for a particular row based on the context menu that

consists of four images such that my imagecolumn gets filled with one of the images that i select from

the right click context menu.

how can i implement the above functionality, any help.

thanks and regards,
Vasu.

GridView

answered on 30 Mar 2009

1 answer

119 views

Nest a RadGridView within a RadElement hierarchy

Hello -

I'm creating a RadElement hierarchy composed of nested panels & various elements, and I'd like to insert a RadGridView under one of the nested StackLayoutPanels. Can you tell me how to do this?

Thanks,

Michael Hewitt

Precision Software Design, LLC

GridView

answered on 30 Mar 2009

1 answer

126 views

Null pointer exception in TreeView

Can you please have a look at this post:

http://www.telerik.com/community/forums/winforms/treeview/in-place-editing-gives-error-for-self-referenced-tree-view-databinding.aspx#779905

Regards,

Rickar Nilsson

Treeview

answered on 30 Mar 2009

3 answers

159 views

Little strange bug with RadMessageBox

Hi,

I created a static class named GlobalMessageBox.

Inside this class, I set ThemeName for all RadMessageBox.Show

For example,

    
                    /// <summary> 
        
                    /// Displays RadMessageBox with specified text.  
        
                    /// </summary> 
        
                    /// <param name="text">The text to display in the RadMessageBox.</param> 
        
                    /// <returns>One of the <see cref="T:System.Windows.Forms.DialogResult"></see> values</returns> 
        
                    public static DialogResult Show(string text) 
        
                    { 
        
                        RadMessageBox.SetThemeName(_theme); 
        
                        return RadMessageBox.Show(text); 
        
                    }

For the theme, I setted a const like this,

    
                    private const string _theme = "Telerik";

In previous version (I have the last one available), it worked. Now, sometime, it crash. (for example, in a form with a huge gridview).
I found a way to "patch" this with :

    
                    private static string _theme = "Telerik";

This is really strange. If somebody can explain me.

Best regards,
Fabien

MessageBox

answered on 30 Mar 2009

5 answers

204 views

Background for Carousel

Hi, what special things do I need to do to correctly put a background on the RadCarousel? If you drag and drop a carousel onto the form I expect to just set the BackgroundImage property and go.. but it doesn't seem to work.

No expense was spared in trying to get this to work and eventually I found by manually adding the following line to the designer code behind I got it to display:

((Telerik.WinControls.Primitives.FillPrimitive)(this.rcFilterOptions.GetChildAt(0).GetChildAt(0))).Visibility = Telerik.WinControls.ElementVisibility.Hidden;

Naturally this was not the first line of code I tried.. I guess I will put that line of code in the FormLoad in case it gets overwritten if I change the design. Please advise if thre is a better/more correct way of getting the background to display.. and if not, please consider this a bug report, or at best, documentation request. My apologies if I missed something when reading the docs and existing forum requests.

My carousel looks awesum now, btw :)

Cheers
Ewart.

Carousel

answered on 30 Mar 2009

1 answer

64 views

Fixed Size DockPanels (Q1 2009)?

Hi,

when using the dockmanger i have 2 panels.

A
B

B must always remain the same height when form resizes.

Any idea on how to accomplish this?

Thank you.

Dock

answered on 30 Mar 2009

4 answers

210 views

Problem with linq to sql and RadGridView

Hi

I am trying my first RadGridView bound to a bindingsource which is bound to a link to sql query result.

When I intially setup the RadGridView I set the datasource to an object which is the linq to sql datacontext class for that table.

I have formatted the grid to only display 2 of the many available fields and specially formated them size and header title.

However the formatting changes I have made do not appear and I get a generic 2 50 char cols. However in the designer it looks ok.

If I edit the designer.cs code and change the IsAutoGenerated to false my formatted cols appear but also two defaulted cols.

What am I doing wrong?

form.cs code

    
                public partial class OrganizationsForm : Telerik.WinControls.RadForm  
        
                {  
        
                    private CallDataClassesDataContext db;  
        
                    public OrganizationsForm()  
        
                    {  
        
                        InitializeComponent();  
        
                        db = new CallDataClassesDataContext();  
        
                        var OrganizationQuery = from organ in db.Organizations  
        
                                                orderby organ.Name  
        
                                                select new 
        
                                                {  
        
                                                    organ.OrganizationId,  
        
                                                    organ.Name  
        
                                                };  
        
                        organizationBindingSource.DataSource = OrganizationQuery;  
        
                    }  
        
                }

designer.cs code

    
                    private void InitializeComponent()  
        
                    {  
        
                        this.components = new System.ComponentModel.Container();  
        
                        Telerik.WinControls.UI.GridViewDecimalColumn gridViewDecimalColumn1 = new Telerik.WinControls.UI.GridViewDecimalColumn();  
        
                        Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn1 = new Telerik.WinControls.UI.GridViewTextBoxColumn();  
        
                        this.organizationBindingSource = new System.Windows.Forms.BindingSource(this.components);  
        
                        this.radGridView1 = new Telerik.WinControls.UI.RadGridView();  
        
                        ((System.ComponentModel.ISupportInitialize)(this.organizationBindingSource)).BeginInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).BeginInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterGridViewTemplate)).BeginInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this)).BeginInit();  
        
                        this.SuspendLayout();  
        
                        //   
        
                        // organizationBindingSource  
        
                        //   
        
                        this.organizationBindingSource.DataSource = typeof(CallMaintain.Organization);  
        
                        //   
        
                        // radGridView1  
        
                        //   
        
                        this.radGridView1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(194)))), ((int)(((byte)(217)))), ((int)(((byte)(247)))));  
        
                        this.radGridView1.Cursor = System.Windows.Forms.Cursors.Default;  
        
                        this.radGridView1.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);  
        
                        this.radGridView1.ForeColor = System.Drawing.SystemColors.ControlText;  
        
                        this.radGridView1.ImeMode = System.Windows.Forms.ImeMode.NoControl;  
        
                        this.radGridView1.Location = new System.Drawing.Point(13, 13);  
        
                        //   
        
                        //   
        
                        //   
        
                        this.radGridView1.MasterGridViewTemplate.AllowColumnChooser = false;  
        
                        this.radGridView1.MasterGridViewTemplate.AllowColumnResize = false;  
        
                        this.radGridView1.MasterGridViewTemplate.AllowDeleteRow = false;  
        
                        this.radGridView1.MasterGridViewTemplate.AllowDragToGroup = false;  
        
                        gridViewDecimalColumn1.AllowGroup = false;  
        
                        gridViewDecimalColumn1.AllowResize = false;  
        
                        gridViewDecimalColumn1.DataType = typeof(int);  
        
                        gridViewDecimalColumn1.FieldAlias = "OrganizationId";  
        
                        gridViewDecimalColumn1.FieldName = "OrganizationId";  
        
                        gridViewDecimalColumn1.FormatInfo = new System.Globalization.CultureInfo("");  
        
                        gridViewDecimalColumn1.HeaderText = "OrganizationId";  
        
                        gridViewDecimalColumn1.IsAutoGenerated = true;  
        
                        gridViewDecimalColumn1.ReadOnly = true;  
        
                        gridViewDecimalColumn1.UniqueName = "OrganizationId";  
        
                        gridViewDecimalColumn1.VisibleInColumnChooser = false;  
        
                        gridViewDecimalColumn1.Width = 80;  
        
                        gridViewTextBoxColumn1.AllowGroup = false;  
        
                        gridViewTextBoxColumn1.FieldAlias = "Name";  
        
                        gridViewTextBoxColumn1.FieldName = "Name";  
        
                        gridViewTextBoxColumn1.FormatInfo = new System.Globalization.CultureInfo("");  
        
                        gridViewTextBoxColumn1.HeaderText = "Name";  
        
                        gridViewTextBoxColumn1.IsAutoGenerated = true;  
        
                        gridViewTextBoxColumn1.UniqueName = "Name";  
        
                        gridViewTextBoxColumn1.VisibleInColumnChooser = false;  
        
                        gridViewTextBoxColumn1.Width = 250;  
        
                        this.radGridView1.MasterGridViewTemplate.Columns.Add(gridViewDecimalColumn1);  
        
                        this.radGridView1.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn1);  
        
                        this.radGridView1.MasterGridViewTemplate.DataSource = this.organizationBindingSource;  
        
                        this.radGridView1.MasterGridViewTemplate.EnableGrouping = false;  
        
                        this.radGridView1.Name = "radGridView1";  
        
                        this.radGridView1.RightToLeft = System.Windows.Forms.RightToLeft.No;  
        
                        this.radGridView1.ShowGroupPanel = false;  
        
                        this.radGridView1.Size = new System.Drawing.Size(381, 150);  
        
                        this.radGridView1.TabIndex = 0;  
        
                        this.radGridView1.Text = "radGridViewPreview";  
        
                        //   
        
                        // OrganizationsForm  
        
                        //   
        
                        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);  
        
                        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;  
        
                        this.ClientSize = new System.Drawing.Size(406, 276);  
        
                        this.Controls.Add(this.radGridView1);  
        
                        this.Name = "OrganizationsForm";  
        
                        this.Text = "Organizations";  
        
                        this.ThemeName = "Office2007Blue";  
        
                        ((System.ComponentModel.ISupportInitialize)(this.organizationBindingSource)).EndInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this.radGridView1.MasterGridViewTemplate)).EndInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this.radGridView1)).EndInit();  
        
                        ((System.ComponentModel.ISupportInitialize)(this)).EndInit();  
        
                        this.ResumeLayout(false);  
        
                        this.PerformLayout();  
        
                    }

Thanks Paul

GridView

answered on 30 Mar 2009