Questions on UI for WinForms Forum

1 answer

501 views

Hierarchy grid child rows do not apply changes to data bound objects.

I am binding objects to a hierarchy grid in code and when a change is made a child row the change is shown in the grid, however, the underlying data object is not updated. I can manually apply the new value after edit to the object, but it seems like grid should be doing this for me.

public partial class Form1 : Form

{

private BindingList<Node> AllNodes = new BindingList<Node>();

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

LoadData();

}

public void LoadData()

{

LoadAllNodes();

grid.DataSource = AllNodes;

LoadAllObjectColumns(grid.MasterTemplate);

// Load child template

GridViewTemplate template = new GridViewTemplate();

LoadAllObjectColumns(template);

grid.MasterTemplate.Templates.Add(template);

GridViewRelation r = new GridViewRelation(grid.MasterTemplate, template);

r.ChildColumnNames.Add("Children");

grid.Relations.Add(r);

}

public void LoadAllNodes()

{

Node p1 = new Node("Parent 1", ItemStatus.None);

Node n1 = new Node("Child 1", ItemStatus.None);

Node n2 = new Node("Child 2", ItemStatus.None);

p1.Children.Add(n1);

p1.Children.Add(n2);

AllNodes.Add(p1);

Node p2 = new Node("Parent 2", ItemStatus.None);

AllNodes.Add(p2);

}

public static void LoadAllObjectColumns(GridViewTemplate template)

{

template.Columns.Clear();

template.EnableFiltering = true;

template.AllowAddNewRow = false;

template.AutoGenerateColumns = false;

GridViewTextBoxColumn colName = new GridViewTextBoxColumn("Name");

colName.HeaderText = "Name";

colName.Name = "Name";

template.Columns.Add(colName);

GridViewComboBoxColumn colStatus = new GridViewComboBoxColumn("Status");

colStatus.HeaderText = "Status";

colStatus.Name = "Status";

colStatus.DataSource = Enum.GetValues(typeof(ItemStatus)).Cast<ItemStatus>();

template.Columns.Add(colStatus);

template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

}

public enum ItemStatus { None, New, Test, Complete };

public class Node : INotifyPropertyChanged

{

public event PropertyChangedEventHandler PropertyChanged;

protected void NotifyPropertyChanged(String info)

{

if (PropertyChanged != null)

{

PropertyChanged(this, new PropertyChangedEventArgs(info));

}

private string name;

private ItemStatus status;

private BindingList<Node> children;

public string Name

{

get

{

return name;

}

set

{

if (name != value)

{

name = value;

NotifyPropertyChanged("Name");

}

public ItemStatus Status

{

get

{

return status;

}

set

{

if (status != value)

{

status = value;

NotifyPropertyChanged("Status");

}

public BindingList<Node> Children

{

get

{

return children;

}

set

{

children = value;

}

public Node(string name, ItemStatus status)

{

this.name = name;

this.status = status;

children = new BindingList<Node>();

}

GridView

answered on 21 Nov 2012

1 answer

159 views

operator & not defined for string "select...." and data rowview

i have 2 ddls and i want to populate the second one based on the value of the first one. so i went on to use a row filter to filter the data view to get the data i need on the second ddl but when the page loads i get the error operator & not defined for string "Select distinct Zones....." and data row view. i click ok on the dialog error box to close it and it goes on to open the form and the code actually works. so how do i get rid of the error

cmd.CommandText = "Select Distinct Zones.ZoneID,CustomerItems.CustomerID as CustomerID,Zones.Zone " & _
"From CustomerItems Inner Join Zones On Zones.ZoneID=CustomerItems.ZoneID " & _
"Inner Join StockItems On StockItems.StockID=CustomerItems.StockID Where CustomerItems.CustomerID='" & ddlCustomers.SelectedValue & "'"
da = New SqlDataAdapter(cmd)
da.Fill(ds, "Zones")

'Populate Zones
ddlZone.DisplayMember = "Zone"
ddlZone.ValueMember = "ZoneID"
ddlZone.DataSource = ds.Tables("Zones")

setup = False
If Not setup Then
Dim dv As DataView
dv = New DataView(ds.Tables("Zones"))
'dv.RowFilter = "CustomerID = '" & ddlCustomers.SelectedValue & "'"
dv.RowFilter = "[CustomerID] = " & ddlCustomers.SelectedValue
ddlZone.DataSource = dv
ddlZone.ValueMember = "ZoneID"
ddlZone.DisplayMember = "Zone"
setup = False
End If

DropDownList

answered on 21 Nov 2012

1 answer

284 views

Autocomplete with PropertyGridTextBoxEditor

HI,

is there any way that i can use Autocomplete with PropertyGridTextBoxEditor ?

Thanks ,
Ishara

PropertyGrid

answered on 20 Nov 2012

7 answers

235 views

Auto suggestion box in Grid

Hello,

We currently have a field of our class that is the list of possible Texture that we can assign to a Sprite. It is a collection received by our Converter

class TextureConverter : ResourceConverter

{

public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context)

{

Type[] tType = new Type[] { typeof(Texture), typeof(TextureAtlas) };

string[] tResource = ProjectManager.Singleton.CurrentProject.GetResourceNameListForType(tType, false);

return new StandardValuesCollection(tResource);

}

And our class member goes like this:

[Category("Settings Sprite")]

[DisplayName("Texture")]

[Description("Current Texture")]

[TypeConverter(typeof(TextureConverter))]

public virtual string Texture

{

get

{

return mTextureCBValues;

}

set

{

if (mTextureCBValues != value)

{

if (value == "")

{

ResetTexture();

}

else

{

Item tTex = ProjectManager.Singleton.CurrentProject.GetResourceByName(value, true, Name);

if (tTex is Texture)

{

mTextureCBValues = value;

SetTexture(tTex as Texture);

}

else if (tTex is TextureAtlas)

{

mTextureCBValues = value;

SetTextureAtlas(tTex as TextureAtlas);

}

else

{

SetStatus(Item.StatusState.ERROR, "Texture " + value + " is not found or invalid");

ResetTexture();

}

Refresh();

NotifyPropertyChanged();

}

How is it possible to make that field so we can "search" (auto-suggestion) for the texture name we want?

Kaven

PropertyGrid

answered on 20 Nov 2012

0 answers

95 views

radComboBox with asp:checkbox in RadGrid column

deleted wrong forum

GridView

asked on 20 Nov 2012

2 answers

238 views

Add a dropDownList in CreateChildElement

Hi , I have to do a list of thumb images with on the left side a dropdown to select a print format
but whe I try to add a RadDropDownList
to this.Children in the CreateChildElements event I get this error "unknown method add(Telerik.WinControl.UI.RadDropDownList) of telerik.wincontrol.radElementCollection

here is the code

protected override void CreateChildElements()

{

base.CreateChildElements();

this.stackLayout = new StackLayoutPanel();

this.stackLayout.Orientation = Orientation.Horizontal;

this.contentElement = new LightVisualElement();

this.contentElement.StretchHorizontally = true;

this.contentElement.MinSize = new Size(220, 2200);

this.stackLayout.Children.Add(this.contentElement);

imageElement = new clsBackDropItem(null,160,106);

imageElement.ImageLayout = System.Windows.Forms.ImageLayout.Center;

this.stackLayout.Children.Add(this.imageElement);

this.buttonElement2 = new RadButtonElement();

this.buttonElement2.Text = "Button2";

this.stackLayout.Children.Add(this.buttonElement2);

this.dd=new RadDropDownList();

this.stackLayout.Children.Add(this.dd);

this.Children.Add(this.stackLayout);

thanks in advance for any suggestion
ciao

ListView

answered on 20 Nov 2012

1 answer

194 views

Retrieve bound entity [row] from gridview using entity framework

Wondering if there is a simple way to do this...

I add an object to my entity context but I have not saved changes yet. Therefore there is no ID or key associated to the entity.
I do however bind the grids datasource to the entities context. The data appears in the grid in the appropriate file.

However, if I want to modify or delete a row whereas the entity hasn't been saved, I can't execute a LINQ query or something to get the record; again because it hasn't been saved yet.

Is there a way to get and assign the entity based upon the row selected?

dim detail as Invoice_Detail = gridview.selectedrow(0).... Or something to that extent.

Thanks
Bob

GridView

answered on 20 Nov 2012

2 answers

146 views

Align 2 charts vertically?

I have 2 lineseries charts, one under another. The horizonal axes labels come from the same data set, however the vertical axes for both vary.

Since the labels for the vertical axes are different, the 0 points for each chart are not aligned. I haven't been able to figure out how to get these to line up. What am I missing?

I am trying to accomplish something like that is in the demo for ChartView -> Chart Types -> Stock Series \ Indicators except that I want the vertical axes on the right hand side.

Attached is a screen shot of the 2 graph unaligned.

ChartView

answered on 20 Nov 2012

3 answers

291 views

SortDescriptors.Expression column names not 'escaped' properly

When I retrieve a SortDescriptors.Expression from my RadGridView the column names are not escaped when they have a space in the name. The FilterDescriptors.Expression does this correctly (IMO) or at least returns what I expect.

For example, I have a RadGridView bound to a DataTable with the following columns: ID, Unit ID, Name
I have the grid sorted by the column 'Unit ID' and also filtered to include only records where 'Unit ID'=1 at run-time.
I then run the following commands:

string sort = this.myRadGridView.SortDescriptors.Expression;

Console.WriteLine(sort);

string filter = this.myRadGridView.FilterDescriptors.Expression;

Console.WriteLine(filter);

I get the following output:

Unit ID ASC

([Unit ID] = 1)

With the FilterDescriptors.Expression value I can insert that string directly back into a SQL query with no issues. With the SortDescriptors.Expression I have to run an addional routine on the result before I can use it in a query.

I have a workaround I am using right now (simple string replace) but the inconsistant results were something I thought I should bring up here. Maybe the SortDescriptors could be changed to work more like the FilterDescriptors in the future? Anyway, this post is mainly an 'FYI' but if anyone has any comments or tips, they would be appreciated.

GridView

answered on 20 Nov 2012

3 answers

200 views

RowIndex when calling AddNew

Hi,

When I click the "Click here to add a new row" text on a grid, the new row is overlaid on the text and I insert values in place. The RowIndex of the new row is -1, and this allows me to differentiate between an insert and an edit,

If I call Rows.AddNew though it looks like the row is inserted and then edited, which means it is assigned a RowIndex and I can't now check whether this is an insert or update.

In the BeginEdit event, I check the RowIndex to determine whether we are inserting or editing as some of the columns are Insert Only as :

Dim rowindex As Integer = e.RowIndex
If rowindex > -1 Then
If CustomCheckForInsertOnly Then
e.Cancel = True
Exit Sub
End If
End If

This works fine for a click initiated insert, but doesn't for a programmatic insert as the RowIndex is now assigned.

Is there a way to simulate the "Click here to add a new row" behaviour when calling Rows.AddNew, or alternatively another way to differentiate between an insert and an update in BeginEdit?

Thanks,

Mark.

GridView

answered on 20 Nov 2012