Questions on UI for WinForms Forum

10 answers

1.9K+ views

Automatic change size of dropdown in DateTimepicker?

I got a datetimepicker. Displaying short date format. If I do the size of the control to suit that format, the drop down showing the month is very small. User can use the handle in the bottom right corner to resize it, but I want it to show nicely to start with. Any way to do that other than increasing the width of the datetimepicker (which leave a lot of blank space to the right)?

Calendar, DateTimePicker, TimePicker and Clock

answered on 26 Jun 2013

3 answers

187 views

Adding a new row also adds an extra row

I have a gridview bound to an BindingList<> and it allows the user to add a new row. Whenever the user clicks on the add new row area, the grid immediately inserts 2 new rows one of them overlaps the area with the prompt "Click here to add a new row". Once the user is done editing one of the rows. An IndexOutOfRangeException is thrown when the grid tries to set the value to the extra row. How can I avoid this?

public NoteHistoryControl()

{

InitializeComponent();

this.noteHistoryGridView.DataSource = new BindingList<Note>(this._noteHistory);

}

private void noteHistoryGridView_CellValueChanged(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)

{

GridViewDataColumn column = e.Column as GridViewDataColumn;

if (column != null && column.FieldName == "Text")

{

this._noteText = e.Value.ToString();

this.noteHistoryGridView.MasterGridViewTemplate.AllowAddNewRow = false;

}

private void InitializeComponent()

{

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn1 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridViewDateTimeColumn gridViewDateTimeColumn1 = new Telerik.WinControls.UI.GridViewDateTimeColumn();

Telerik.WinControls.UI.GridViewTextBoxColumn gridViewTextBoxColumn2 = new Telerik.WinControls.UI.GridViewTextBoxColumn();

Telerik.WinControls.UI.GridSortField gridSortField1 = new Telerik.WinControls.UI.GridSortField();

this.panel1 = new System.Windows.Forms.Panel();

this.noteLabel = new System.Windows.Forms.Label();

this.noteHistoryGridView = new Telerik.WinControls.UI.RadGridView();

this.panel1.SuspendLayout();

((System.ComponentModel.ISupportInitialize)(this.noteHistoryGridView)).BeginInit();

((System.ComponentModel.ISupportInitialize)(this.noteHistoryGridView.MasterGridViewTemplate)).BeginInit();

this.SuspendLayout();

//

// panel1

//

this.panel1.Controls.Add(this.noteLabel);

this.panel1.Dock = System.Windows.Forms.DockStyle.Top;

this.panel1.Location = new System.Drawing.Point(0, 0);

this.panel1.Name = "panel1";

this.panel1.Padding = new System.Windows.Forms.Padding(3);

this.panel1.Size = new System.Drawing.Size(400, 28);

this.panel1.TabIndex = 0;

//

// noteLabel

//

this.noteLabel.AutoSize = true;

this.noteLabel.Font = new System.Drawing.Font("Microsoft Sans Serif", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));

this.noteLabel.Location = new System.Drawing.Point(6, 6);

this.noteLabel.Margin = new System.Windows.Forms.Padding(3);

this.noteLabel.Name = "noteLabel";

this.noteLabel.Size = new System.Drawing.Size(44, 16);

this.noteLabel.TabIndex = 1;

this.noteLabel.Text = "Notes";

//

// noteHistoryGridView

//

this.noteHistoryGridView.BackColor = System.Drawing.SystemColors.Control;

this.noteHistoryGridView.Cursor = System.Windows.Forms.Cursors.Default;

this.noteHistoryGridView.Dock = System.Windows.Forms.DockStyle.Fill;

this.noteHistoryGridView.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F);

this.noteHistoryGridView.ForeColor = System.Drawing.SystemColors.ControlText;

this.noteHistoryGridView.ImeMode = System.Windows.Forms.ImeMode.NoControl;

this.noteHistoryGridView.Location = new System.Drawing.Point(0, 28);

//

this.noteHistoryGridView.MasterGridViewTemplate.AddNewRowPosition = Telerik.WinControls.UI.PinnedRowPosition.Bottom;

this.noteHistoryGridView.MasterGridViewTemplate.AllowColumnChooser = false;

this.noteHistoryGridView.MasterGridViewTemplate.AllowColumnReorder = false;

this.noteHistoryGridView.MasterGridViewTemplate.AllowDeleteRow = false;

this.noteHistoryGridView.MasterGridViewTemplate.AllowDragToGroup = false;

this.noteHistoryGridView.MasterGridViewTemplate.AllowEditRow = false;

this.noteHistoryGridView.MasterGridViewTemplate.AutoGenerateColumns = false;

this

.noteHistoryGridView.MasterGridViewTemplate.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

gridViewTextBoxColumn1.AllowFiltering = false;

gridViewTextBoxColumn1.AllowGroup = false;

gridViewTextBoxColumn1.AllowHide = false;

gridViewTextBoxColumn1.FieldAlias = "columnNote";

gridViewTextBoxColumn1.FieldName = "Text";

gridViewTextBoxColumn1.HeaderText = "Note";

gridViewTextBoxColumn1.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewTextBoxColumn1.MinWidth = 50;

gridViewTextBoxColumn1.Multiline = true;

gridViewTextBoxColumn1.UniqueName = "columnNote";

gridViewTextBoxColumn1.Width = 215;

gridViewTextBoxColumn1.WrapText = true;

gridViewDateTimeColumn1.AllowFiltering = false;

gridViewDateTimeColumn1.AllowGroup = false;

gridViewDateTimeColumn1.AllowHide = false;

gridViewDateTimeColumn1.DataType = typeof(System.DateTime);

gridViewDateTimeColumn1.FieldAlias = "EntryDate";

gridViewDateTimeColumn1.FieldName = "EntryDate";

gridViewDateTimeColumn1.HeaderText = "Entry Date";

gridViewDateTimeColumn1.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewDateTimeColumn1.MinWidth = 50;

gridViewDateTimeColumn1.ReadOnly = true;

gridViewDateTimeColumn1.UniqueName = "columnDate";

gridViewDateTimeColumn1.Width = 215;

gridViewTextBoxColumn2.AllowFiltering = false;

gridViewTextBoxColumn2.AllowGroup = false;

gridViewTextBoxColumn2.AllowHide = false;

gridViewTextBoxColumn2.FieldAlias = "EntryUsername";

gridViewTextBoxColumn2.FieldName = "EntryUsername";

gridViewTextBoxColumn2.HeaderText = "Username";

gridViewTextBoxColumn2.HeaderTextAlignment = System.Drawing.ContentAlignment.MiddleLeft;

gridViewTextBoxColumn2.MinWidth = 50;

gridViewTextBoxColumn2.ReadOnly = true;

gridViewTextBoxColumn2.UniqueName = "columnUsername";

gridViewTextBoxColumn2.Width = 215;

this.noteHistoryGridView.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn1);

this.noteHistoryGridView.MasterGridViewTemplate.Columns.Add(gridViewDateTimeColumn1);

this.noteHistoryGridView.MasterGridViewTemplate.Columns.Add(gridViewTextBoxColumn2);

this.noteHistoryGridView.MasterGridViewTemplate.EnableGrouping = false;

this.noteHistoryGridView.MasterGridViewTemplate.ShowRowHeaderColumn = false;

gridSortField1.FieldAlias = "columnDate";

gridSortField1.FieldName = "columnDate";

this.noteHistoryGridView.MasterGridViewTemplate.SortExpressions.Add(gridSortField1);

this.noteHistoryGridView.Name = "noteHistoryGridView";

this.noteHistoryGridView.RightToLeft = System.Windows.Forms.RightToLeft.No;

this.noteHistoryGridView.SelectionMode = Telerik.WinControls.UI.GridViewSelectionMode.CellSelect;

this.noteHistoryGridView.ShowGroupPanel = false;

this.noteHistoryGridView.Size = new System.Drawing.Size(400, 122);

this.noteHistoryGridView.TabIndex = 1;

this.noteHistoryGridView.ThemeName = "ControlDefault";

this.noteHistoryGridView.CellValueChanged += new Telerik.WinControls.UI.GridViewCellEventHandler(this.noteHistoryGridView_CellValueChanged);

//

// NoteHistoryControl

//

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.Controls.Add(this.noteHistoryGridView);

this.Controls.Add(this.panel1);

this.MinimumSize = new System.Drawing.Size(350, 125);

this.Name = "NoteHistoryControl";

this.Size = new System.Drawing.Size(400, 150);

this.panel1.ResumeLayout(false);

this.panel1.PerformLayout();

((System.ComponentModel.ISupportInitialize)(this.noteHistoryGridView.MasterGridViewTemplate)).EndInit();

((System.ComponentModel.ISupportInitialize)(this.noteHistoryGridView)).EndInit();

this.ResumeLayout(false);

this.PerformLayout();

}

GridView

answered on 26 Jun 2013

1 answer

117 views

UseStaticHeaders and autosize

When you have a radgrid using UseStaticHeaders=True, the radgrid's width fills the browser. If you resize the columns using best fit, sometimes, depending on how many columns you have, an empty column shows up filling the space between your last column and the radgrids right boundary. How is this done? I am trying to achieve the same effect using columns with HeaderWidths specified. Do I just add an empty GridTemplateColumn?

GridView

answered on 26 Jun 2013

2 answers

255 views

Expression. DivideByZeroException.

Hi,

To reproduce problem just add 3 columns to grid and paste code below to Load event.

private void Form1_Load(object sender, EventArgs e)

{

DataTable dt = new DataTable();

dt.Columns.Add("d1", typeof(Decimal));

dt.Columns.Add("d2", typeof(Decimal));

dt.Rows.Add(new object[] { 3, 4 });

dt.Rows.Add(new object[] { 1, 4 });

dt.Rows.Add(new object[] { 0, 3 });

dt.Rows.Add(new object[] { 3, 3 });

radGridView1.Columns[0].FieldName = "d1";

radGridView1.Columns[0].HeaderText = "d1";

radGridView1.Columns[0].Name = "d1";

radGridView1.Columns[1].FieldName = "d2";

radGridView1.Columns[1].HeaderText = "d2";

radGridView1.Columns[1].Name = "d2";

radGridView1.Columns[2].HeaderText = "exp";

radGridView1.DataSource = dt;

radGridView1.Columns[2].Expression = "IIF(d1 = 0, 0, d2 / d1 )"

}

Even if we apply the condition that checks divide by zero, program will trow error:
A first chance exception of type 'System.DivideByZeroException' occurred in mscorlib.dll

I was able to fool the "Expression" by double condition like this:

radGridView1.Columns[2].Expression = "IIF(d1 = 0, 0, d2 / (IIF(d1 = 0, 9999 , d1)))";

GridView

answered on 25 Jun 2013

2 answers

189 views

[Solved] Prevent Auto-Expand of Nodes during Drag and Drop?

I want to disable treenode auto-expansion for certain nodes when I drag a treenode . I tried the DragOverEvent but it did not do what I wanted. I know the Animation property was not correct, but couldn't find anything else.

Private Sub tvwSetup_DragOverNode(sender As Object, e As RadTreeViewDragCancelEventArgs) Handles tvwSetup.DragOverNode

'disable expansion for nodes with values < 100

If e.TargetNode.Value < 100 Then tvwSetup.ExpandAnimation = ExpandAnimation.None

End Sub

I've seen a solution for ASP using the "OnClientNodeExpanding" event. Can such a thing be done in the Winforms treeview?

Treeview

answered on 25 Jun 2013

0 answers

121 views

Scrolling problem while reordering the rows in rad grid

While reordering the rows in rad grid the scroll bar is not moving

Example : -

i'm having 37 rows and scrolling is also shown and

now see the pic 1 : i'm selecting one row and moving it down

now see the pic 2 : you can see the selected row is visible up to the height of the grid view

now see the pic 3 : if you still move the selected row down, its moving down but the scroll bar is not moving parallel and the selected row is not visible to the user

GridView

asked on 25 Jun 2013

9 answers

430 views

Rows Re order issue

Hi,
I want to reorder the rows within a grid with few condition. For example, i have 10 records in the grid.
The first 2 records should not reordered.
From the 3rd to 10th record, they can be re ordered between themselves and not with record 1 and 2. How should i acheive this?
Is there any event to handle the Reorder event?

GridView

answered on 25 Jun 2013

2 answers

258 views

[Solved] Adding pages to DocumentWindow

Hi, I have a problem and can't find a solution for it:
I have this code that should add a new page to the ...UI.Docking.DocumentWindow on Form1. If I use it on a button on Form1 works fine, but if I try to call it from Form2 the code runs through and show's the messageBox on the end but it doesn't add the page, here's the code:

private void mNextP1_Click(object sender, EventArgs e)

{

string txt = File.ReadAllText("c:\\1.html");

string style = File.ReadAllText("c:\\styles.css");

Form f = new Form();

f.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;

f.Dock = DockStyle.Fill;

WebBrowser wb = new WebBrowser();

wb.DocumentText = "";

wb.Dock = DockStyle.Fill;

doc = wb.Document.DomDocument as IHTMLDocument2;

doc.designMode = "On";

doc.write(txt);

IHTMLStyleSheet styleSheet = doc.createStyleSheet("", 0);

styleSheet.cssText = style;

f.Controls.Add(wb);

DocumentWindow dw = new DocumentWindow();

f.TopLevel = false;

dw.Controls.Add(f);

f.Show();

dw.Text = "Contents";

radDock1.AddDocument(dw);

radDock1.ActiveWindow = dw;

MessageBox.Show("Done");

}

This one works just fine, but here comes the problem:
I have this on my form2:

Form1 form1 = new Form1();

form1.newBlankProject();

and the code for "form1.newBlankProject();" is the same as above, but for some reason it only show's the messagebox with the text "Done2" and nothing else happens. Here's the code for that one too:

public void newBlankProject()

{

string txt = File.ReadAllText("c:\\1.html");

string style = File.ReadAllText("c:\\styles.css");

Form f = new Form();

f.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;

f.Dock = DockStyle.Fill;

WebBrowser wb = new WebBrowser();

wb.DocumentText = "";

wb.Dock = DockStyle.Fill;

doc = wb.Document.DomDocument as IHTMLDocument2;

doc.designMode = "On";

doc.write(txt);

IHTMLStyleSheet styleSheet = doc.createStyleSheet("", 0);

styleSheet.cssText = style;

f.Controls.Add(wb);

DocumentWindow dw = new DocumentWindow();

f.TopLevel = false;

dw.Controls.Add(f);

f.Show();

dw.Text = "Contents";

radDock1.AddDocument(dw);

radDock1.ActiveWindow = dw;

MessageBox.Show("Done2");

}

Probably is just a stupid mistake on my part, but I can't figure out what the problem may be, any help or ideas are appreciated,

Thanks,
Z

Dock

answered on 25 Jun 2013

3 answers

204 views

[Solved] Q2 2013 Visual Studio 2010

I have juste installed the new version of RadControl for Winform and I have notice a little issue with the VisualStudio 2010 add-in.

There is no more menu for adding a RadForm to a Project, upgrading a Project to the new version of assembly, etc. In fact, there is only a "About" item in the menu.

It's not painfull to update the references by hand but theses Tools where nice to have !

Visual Studio Extensions

answered on 25 Jun 2013

3 answers

266 views

[Solved] RadMultiColumnComboBox and Virtual Mode

I am trying to use the combo in virtual mode, but am getting poor performance. If I arrow down while focus is in the text box, it responds OK, but if I click the drop down button it takes quite a while to respond.

Sample code follows. Any ideas?

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

radMultiColumnComboBox1.EditorControl.EnableSorting = false;

radMultiColumnComboBox1.EditorControl.EnableFiltering = false;

radMultiColumnComboBox1.EditorControl.EnableGrouping = false;

}

private void Form1_Load(object sender, EventArgs e)

{

radMultiColumnComboBox1.EditorControl.VirtualMode = true;

radMultiColumnComboBox1.EditorControl.CellValueNeeded += new Telerik.WinControls.UI.GridViewCellValueEventHandler(EditorControl_CellValueNeeded);

radMultiColumnComboBox1.EditorControl.ColumnCount = 2;

radMultiColumnComboBox1.EditorControl.RowCount = 2000;

}

void EditorControl_CellValueNeeded(object sender, Telerik.WinControls.UI.GridViewCellValueEventArgs e)

{

e.Value = e.RowIndex.ToString() + "," + e.ColumnIndex.ToString();

}

MultiColumn ComboBox

answered on 25 Jun 2013