Questions on UI for WinForms Forum

1 answer

159 views

DropDownList, Entities, and default Text

We are using Winforms Q3 2011. In our application, many of our dropdown lists are populated from lookup tables, so we have a generic method that maps to a lookup type, and we set the datasource to that:

Dim MyList as List(of AC.Lookup) = '... EF code



ddl.DataSource = MyList

Many of the lists are not required fields, so the proper default is to have nothing selected. When this is the case, however, the dropdown lists will have "AC.Lookup" displayed (where AC is the namespace for this EDMX file). After investigating, what appears to be happening is that the datasource doesn't quite know what to do with an empty list, so somehow it is calling the ToString.

This is confusing to the users. :-) I first looked for a "default text" or some other such property on the dropdown list, and when I couldn't find that, I tried to do various hacks, mainly around setting the text to nothing after some event (DataBinding, TextChanged, whatever). That method failed, too. What I ended up doing was creating a partial class tied to the Lookup class (the original Lookup class is generated from the designer, so I didn't want to change it), overriding ToString to return String.Empty. That worked and solved our problem, but it still seems very hackish.

Do you have a better, more elegant solution?

Thanks!

DropDownList

answered on 16 Mar 2012

1 answer

144 views

FormatString doesn't work

Hi All,

a have this procedure :

foreach (GridViewDataColumn dataColumn in radGridBatches.Columns)

{

dataColumn.TextAlignment = ContentAlignment.BottomRight;

dataColumn.FormatString = "{0:F2}";

}

but the number in Grid are 600
                                           592.35
                                          600
                                           etc...
need somebody help ?

lot thanks Alda

PROBLEM SOLVED, DOUBLE CONVERTED TO DECIMAL

GridView

answered on 16 Mar 2012

2 answers

92 views

Dock left or as additional tab to existing left docked window

I am new to Telerik controls and am working my way through the documentation as writing a project with the controls.

Our Dock panel will start empty and new tabbed documents and tool windows will be added in code (docking user controls). If a new tool window is added i need to dock it to the left. But, if a tool window already exists docked to the left then I need the new window to become a tab, rather than docking between that and the main window.

Imagine I have 3 user controls A, B, C, multiple sopies of which may be instantiated as a tool window. Each time an addition one is instantiated, i need to to add itself to the tabs. but, of course, if it is the first then it needs to simply dock left.

If anybody can help with this, that would be great!

Thank you in advance
Tony

Dock

answered on 16 Mar 2012

2 answers

119 views

Remember positions of windows added in code

Hello, it's me again!

I will be adding tabbed documents and tool windows in code and of course it's straight forward to set those into default locations. However, if the user moves this tool window then closes it (fully disposed), later to open it again, i'd like it to open in the location it was last placed. Is this possible or will I need to save some settings to recall ?

thanks in advance
Tony

Dock

answered on 16 Mar 2012

1 answer

150 views

GridView with combobox

Hi
i have gridview with a combox column.
My problem is i want to show combobox when the form is loaded.rather empty cell in the whole column of grid.and it gets the shape of
combo when i double clik on it.
2nd issue is comboxbox got selected on double click.First click enables it and i have to make a 2nd click to drop the list.
I want to show the combobox droped on first click.

Help appreciated.
thnks

GridView

answered on 16 Mar 2012

2 answers

173 views

Scroll state causes RadDropDownListElement to show incorrect value

I have a collection of custom visual items contained in a RadListView. These visual items consist of several RadTextBoxElements and a RadDropDownListElement. If a new item is added to the RadListView, say the drop down list item selected is different than the one above it, then the user scrolls up, the selected item of the drop down list for the next to last item becomes the selected item of the new item's drop down. Doing this again propagates it up the visual items.

I have debugged all code and determined that there are some inconsistencies in scrolling that seem to be making this happen. I can get around it if the scrollbar does not start at the bottom by setting focus to the first textbox in the visual item. This scrolls to the bottom and then I cannot reproduce.

What is happening here? Any ideas?

Below are my overridden CreateChileElements and SynchronizeProperties methods:

base.CreateChildElements();

//Setup the name label and field in a stack panel layout

this.nameStackPanelElement = new StackLayoutElement();

this.nameStackPanelElement.Orientation = Orientation.Horizontal;

this.nameStackPanelElement.ElementSpacing = 17;

this.nameStackPanelElement.StretchHorizontally = true;

this.nameLabelElement = new RadLabelElement();

this.nameLabelElement.Text = "Name";

this.nameLabelElement.AutoSize = true;

this.nameLabelElement.StretchHorizontally = false;

this.nameTextBoxElement = new RadTextBoxElement();

this.nameTextBoxElement.StretchHorizontally = true;

this.nameTextBoxElement.MinSize = new Size(120, 0);

this.nameTextBoxElement.TextBoxItem.MaxLength = 100;

this.nameTextBoxElement.TextBoxItem.LostFocus += new EventHandler(NameTextBoxItem_LostFocus);

this.nameTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.nameStackPanelElement.Children.Add(this.nameLabelElement);

this.nameStackPanelElement.Children.Add(this.nameTextBoxElement);

//Setup the script label and field in a stack panel layout

this.scriptStackPanelElement = new StackLayoutElement();

this.scriptStackPanelElement.Orientation = Orientation.Horizontal;

this.scriptStackPanelElement.ElementSpacing = 18;

this.scriptStackPanelElement.StretchHorizontally = true;

this.scriptLabelElement = new RadLabelElement();

this.scriptLabelElement.Text = "Script";

this.scriptLabelElement.AutoSize = true;

this.scriptLabelElement.StretchHorizontally = false;

this.scriptTextBoxElement = new RadTextBoxElement();

this.scriptTextBoxElement.StretchHorizontally = true;

this.scriptTextBoxElement.MinSize = new Size(120, 0);

this.scriptTextBoxElement.TextBoxItem.MaxLength = 30;

this.scriptTextBoxElement.TextBoxItem.LostFocus += new EventHandler(ScriptTextBoxItem_LostFocus);

this.scriptTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.scriptStackPanelElement.Children.Add(this.scriptLabelElement);

this.scriptStackPanelElement.Children.Add(this.scriptTextBoxElement);

//Setup the modifier label and drop down list in a stack panel layout

this.modifierStackPanelElement = new StackLayoutElement();

this.modifierStackPanelElement.Orientation = Orientation.Horizontal;

this.modifierStackPanelElement.ElementSpacing = 4;

this.modifierStackPanelElement.StretchHorizontally = true;

this.modifierLabelElement = new RadLabelElement();

this.modifierLabelElement.Text = "Modifier";

this.modifierLabelElement.AutoSize = true;

this.modifierLabelElement.StretchHorizontally = false;

this.modifierDropDownListElement = new RadDropDownListElement();

this.modifierDropDownListElement.StretchHorizontally = true;

this.modifierDropDownListElement.MinSize = new Size(60, 0);

this.modifierDropDownListElement.DropDownStyle = RadDropDownStyle.DropDownList;

this.modifierDropDownListElement.SelectedIndexChanged +=

new Telerik.WinControls.UI.Data.PositionChangedEventHandler(modifierDropDownListElement_SelectedIndexChanged);

this.modifierStackPanelElement.Children.Add(this.modifierLabelElement);

this.modifierStackPanelElement.Children.Add(this.modifierDropDownListElement);

//Fill the modifier drop down list and select the zeroth element

foreach (ModKeys mod in Enum.GetValues(typeof(ModKeys)))

{

this.modifierDropDownListElement.Items.Add(mod.ToString());

}

//Setup the key label and field in a stack panel layout

this.keyStackPanelElement = new StackLayoutElement();

this.keyStackPanelElement.Orientation = Orientation.Horizontal;

this.keyStackPanelElement.ElementSpacing = 4;

this.keyLabelElement = new RadLabelElement();

this.keyLabelElement.Text = "Key";

this.keyLabelElement.AutoSize = true;

this.keyLabelElement.StretchHorizontally = false;

this.keyTextBoxElement = new RadTextBoxElement();

this.keyTextBoxElement.StretchHorizontally = true;

this.keyTextBoxElement.MinSize = new Size(34, 0);

this.keyTextBoxElement.TextBoxItem.MaxLength = 1;

this.keyTextBoxElement.TextBoxItem.LostFocus += new EventHandler(KeyTextBoxItem_LostFocus);

this.keyTextBoxElement.TextChanged += new EventHandler(ImportantField_TextChanged);

this.keyStackPanelElement.Children.Add(this.keyLabelElement);

this.keyStackPanelElement.Children.Add(this.keyTextBoxElement);

//Combine the key and modifier panels into one stack panel layout

this.modifierKeyStackPanelElement = new StackLayoutElement();

this.modifierKeyStackPanelElement.Orientation = Orientation.Horizontal;

this.modifierKeyStackPanelElement.ElementSpacing = 4;

this.modifierKeyStackPanelElement.StretchHorizontally = true;

this.modifierKeyStackPanelElement.Children.Add(this.modifierStackPanelElement);

this.modifierKeyStackPanelElement.Children.Add(this.keyStackPanelElement);

//Setup the save and cancel buttons in a stack panel layout

this.newButtonsStackPanelElement = new StackLayoutElement();

this.newButtonsStackPanelElement.Orientation = Orientation.Horizontal;

this.newButtonsStackPanelElement.ElementSpacing = 4;

this.newButtonsStackPanelElement.StretchHorizontally = true;

Padding newButtonsStackMargin = this.newButtonsStackPanelElement.Margin;

this.newButtonsStackPanelElement.Margin = new Padding(52, newButtonsStackMargin.Top,

-12, newButtonsStackMargin.Bottom);

this.saveButtonElement = new RadButtonElement("Save");

this.saveButtonElement.Enabled = false;

this.saveButtonElement.Click += new EventHandler(saveButtonElement_Click);

this.cancelButtonElement = new RadButtonElement("Cancel");

this.cancelButtonElement.Click += new EventHandler(deleteCancelButtonElement_Click);

this.newButtonsStackPanelElement.Children.Add(this.saveButtonElement);

this.newButtonsStackPanelElement.Children.Add(this.cancelButtonElement);

//Setup the insert and delete buttons in a stack panel layout and set them

//to collapsed initially.

this.existingButtonsStackPanelElement = new StackLayoutElement();

this.existingButtonsStackPanelElement.Orientation = Orientation.Horizontal;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

this.existingButtonsStackPanelElement.ElementSpacing = 4;

this.existingButtonsStackPanelElement.StretchHorizontally = true;

Padding existingButtonsStackMargin = this.existingButtonsStackPanelElement.Margin;

this.existingButtonsStackPanelElement.Margin = new Padding(52, existingButtonsStackMargin.Top - 4,

-12, existingButtonsStackMargin.Bottom + 4);

this.insertButtonElement = new RadButtonElement("Insert");

this.insertButtonElement.Click += new EventHandler(insertButtonElement_Click);

this.deleteButtonElement = new RadButtonElement("Delete");

this.deleteButtonElement.Click += new EventHandler(deleteCancelButtonElement_Click);

this.existingButtonsStackPanelElement.Children.Add(this.insertButtonElement);

this.existingButtonsStackPanelElement.Children.Add(this.deleteButtonElement);

//Setup the separator that will separate this item from the one below it

this.itemSeparator = new SeparatorElement();

this.itemSeparator.StretchHorizontally = true;

this.itemSeparator.Line1.BackColor = Color.FromArgb(76, 76, 76);

//Padding separatorMargin = itemSeparator.Margin;

//this.itemSeparator.Margin = new Padding(separatorMargin.Left, separatorMargin.Top + 4, separatorMargin.Right, separatorMargin.Bottom);

//Setup the outermost stack panel layout element and add all

//of the other stack panel layout elements as its children.

this.parentStackPanelElement = new StackLayoutElement();

this.parentStackPanelElement.Orientation = Orientation.Vertical;

this.parentStackPanelElement.ElementSpacing = 4;

this.parentStackPanelElement.Margin = new Padding(4);

this.parentStackPanelElement.StretchHorizontally = true;

this.parentStackPanelElement.Children.Add(this.nameStackPanelElement);

this.parentStackPanelElement.Children.Add(this.scriptStackPanelElement);

this.parentStackPanelElement.Children.Add(this.modifierKeyStackPanelElement);

this.parentStackPanelElement.Children.Add(this.newButtonsStackPanelElement);

this.parentStackPanelElement.Children.Add(this.existingButtonsStackPanelElement);

this.parentStackPanelElement.Children.Add(this.itemSeparator);

//Finally, add the outermost stack panel layout element to the

//SimpleListViewVisualItem's Children

this.Children.Add(this.parentStackPanelElement);

lock (Program.scriptsLockObject)

{

base.SynchronizeProperties();

this.Text = "";

this.Script = this.Data.Value as Script;

if (this.Script != null)

{

if (this.Script.IsNew)

{

this.newButtonsStackPanelElement.Visibility = ElementVisibility.Visible;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

//if (!this.IsElementVisible)

//{

//}

this.nameTextBoxElement.Focus();

}

else

{

this.newButtonsStackPanelElement.Visibility = ElementVisibility.Collapsed;

this.existingButtonsStackPanelElement.Visibility = ElementVisibility.Visible;

this.insertButtonElement.Enabled = !string.IsNullOrWhiteSpace(this.Script.ScriptText);

}

this.nameTextBoxElement.Text = this.Script.Name;

this.scriptTextBoxElement.Text = this.Script.ScriptText;

this.modifierDropDownListElement.SelectedIndex = (int)this.Script.KeyModifier;

this.keyTextBoxElement.Text = this.Script.Key;

}

ListView

answered on 16 Mar 2012

2 answers

178 views

Multiple summary rows

Hello,

during the development of a WinForms application for our customer the following problem arose when using multiple summary rows in grid:

1) the attached picture shows existing grid with 2 summary rows. The requirement is that first summary row sums data only from even rows and the second summary row sums data only from odd rows. Is it possible to achieve these "filtered" sums? The grid is bound with custom objects which contain a boolean value which would serve as a basis for addition of data (DataBoundItem).

2) how can custom style be applied to specific summary row when using multiple summary rows (in our scenario the first summary row should be blue and the second one red)?

GridView

answered on 16 Mar 2012

2 answers

193 views

Different child templates on second level hierarchical model

Hi,

Is it possible to configure RadGridView to have different child templates on the same level of hierarchical data rows? Or to have different columns collections for each group?

I want to accomplish something like this:

[Data model]
Class Flat
{
string name;
List<Room> rooms;
}

Class Room
{
string name;
bool table;
bool bath;
bool desk;
int walls;
}

[View]

1. Expandable rows with objects "Flat" (visible columns: Name)
2. Second hierarchy with rooms, but on this level different columns visible for every room type:

If room name is "Bathroom" then columns are: name, bath, walls.
If room name is "Saloon" then columns are: name, table, walls.
etc.

Is it feasible on one grid?

Best Regards
Krzysztof

GridView

answered on 16 Mar 2012

4 answers

231 views

Number formatting

Is it possible to format a column using number formats or date formats?

Thanks,

Javier Gonzalez de Aragon

ListView

answered on 16 Mar 2012

3 answers

253 views

Custom sorting in DetailView?

I understand you can perform custom sorting using a grid and a tree but how do you do this from within a RadListView? Basically I have a bound column that contains strings, some are words, some are numbers. I need to sort them in a "unique" manner. Can I pass a column a custom sort method or hook a sort event or pass a custom sort descriptor or ???

ListView

answered on 16 Mar 2012