Develop Reference

DataGridView Loading From LINQ

I have a form with DataGridViews that have the DataSource set to a DataContext of my database to auto pull in the info and allow it to be edited. But I need a color to display a Color from the color id that corresponds to a color in a colors table and I don't know how I can achieve this with also allowing it to auto edit and update the records.
private dbCounterTopsDataContext dbContext = new dbCounterTopsDataContext();
private void FrmCurrentInventory_Load(object sender, EventArgs e)
{
dataGridColors.DataSource = dbContext.Colors;
dataGridBarTops.DataSource = dbContext.BarTops;
dataGridKitchenTops.DataSource = dbContext.Kitchens;
dataGridVanityTops.DataSource = dbContext.Vanities;
}
I have also tried this and it worked with displaying but I could no longer update directly from the datagrid
private void FrmCurrentInventory_Load(object sender, EventArgs e)
{
dataGridColors.DataSource = dbContext.Colors.Select(o => new { ColorId = o.ColorID, Color = o.Color1 });
dataGridBarTops.DataSource = dbContext.BarTops.Select(o => new { Color = o.Color.Color1, Length = o.Length, Width = o.Width });
dataGridKitchenTops.DataSource = dbContext.Kitchens.Select(o => new { Color = o.Color.Color1, Length = o.Length }).ToList();
dataGridVanityTops.DataSource = dbContext.Vanities;
}

Some good tips in the comments from SSS, perhaps the easiest way to get this going is to use AutogenerateColumns to gen most of the stuff and then add a few combo box columns for your colors. It would probably go something like this:
dataGridColors.DataSource =
dataGridBarTops.DataSource = dbContext.BarTops;
dataGridBarTops.AutogenerateColumns = false;
var c = new DataGridViewComboBoxColumn();
c.HeaderText = "Color";
c.DisplayMember = "Color1"; //name of property that says Blue in color entity
c.ValueMember = "ColorID"; //name of property that says 5 in color/entity
c.DataPropertyName = "BarTopColorId"; //name of property that says 5 in BARTOPS table/entity
c.DataSource = dbContext.Colors; //personally I would use a bindingSource here
dataGridBarTops.Columns.Add(cb);
I'll leave removing the text box color is column as an exercise for you- maybe leave it in first to see how combo is working
The Colors datagridview is for editing the actual Colors definitions etc. The combo box in the bar top table is for choosing a different color is for a single bar top. If you edit the Colors table it will change what is in the list of the combo. If you pick a new combo value it will change the bartop's color id (whatever that property is called) value
Be careful not to edit away ids in Colors that are used in bartops - don't delete color Id 5 from the Colors table while there is still a bartop that uses it
I put a comment there about bindingsources. I've never bound a DGV straight to a LINQ entity list, nor probably would I (partly because it's downloading an entire table, which could be huge and partly because my winforms databinding is near exclusively with strongly typed datasets) but you find it to work (and maybe you need the whole table, no filtering). If, however you start to see strange effects like selecting different rows in the Colors datagridview causes all the combo boxes to change value, bind the combo through a bindingsource so they have something that dedicatedly tracks "the current item" for the combo

WPF DataGrid editable cells with Items put directively

So, I have a DataGrid, that I want to manipulate programmatically a lot.
string[] values = new string[something.Count];
for (int i = 0; i < somethingElse.Count; i++)
{
if (condition)
values[i] = Data[i].ToString();
else
values[i] = "";
}
var style = new System.Windows.Style(typeof(DataGridRowHeader));
style.Setters.Add(new Setter(DataGridRowHeader.ContentProperty, Data[0].ToString()));
MyGrid.Items.Add(new DataGridRow()
{
HeaderStyle = style,
Item = values
});
This I do in a loop and I am able to fill in my grid with all the data I need.
Later, I am able to access cells, edit them, take their values, whatever I want and need.
However, when user wants to use the grid as you would in MS Excel, the cells are not editable.
So I went the other way and created a :
ObservableCollection<ObservableCollection<string>> gridData = new ObservableCollection<ObservableCollection<string>>();
//*** ... *** the gridData is filled in the same way, you can imagine
MyGrid.ItemsSource = gridData;
This does fill in the data perfectly the same way, more than that, the data are now editable.
But my custom row headers disappeared.
I need them, also, I do not think I want to use binding for row header values.
Can the first approach be somehow modified to still be editable, but rows with data being filled the very same way?

I eventually solved this combining both the abovementioned approaches.
First, I generate ObservableCollection<ObservableCollection<string>> dataCollection, fill it with data.
Next I generate an ObservableCollection<DataGridRow> rowCollection collection.
In my declarative part of the loop from the first approach, that you can see in the question, I do this
rowCollection.Add(new DataGridRow()
{
HeaderStyle = style,
Item = dataCollection[i] //for the corresponding iteration element
});
This all ends up when setting
MyGrid.ItemsSource = rowCollection;
Till now (very little time of testing), this seems to be what I was looking for, hope it might help someone else aswell.

Chart Control .NET not showing all data

I have used .net chart control in a website. When I launch it with big amount of data, the chart does not show all data. If any one can help me find out if there is a way to show all the data I have. And If I can show the legends above the chart. Please reply.
Series series = new Series(name);
series.ChartType = (type == 1) ? SeriesChartType.Column : SeriesChartType.Pie;
foreach (KeyValuePair<string, double> item in xy)
{
series.Points.AddXY(item.Key,item.Value);
}

You should set maximunm and minimum values
Chart1.ChartAreas("ChartArea1").AxisY.Maximum = vMaxY
Chart1.ChartAreas("ChartArea1").AxisY.Minimum = vMaxY

How to change the view angle and label value of a chart .NET C#

Short Description
I am using charts for a specific application where i need to change the view angle of the rendered 3D Pie chart and value of automatic labels from pie label names to corresponding pie values.
This how the chart looks:
Initialization
This is how i initialize it:
Dictionary<string, decimal> secondPersonsWithValues = HistoryModel.getSecondPersonWithValues();
decimal[] yValues = new decimal[secondPersonsWithValues.Values.Count]; //VALUES
string[] xValues = new string[secondPersonsWithValues.Keys.Count]; //LABELS
secondPersonsWithValues.Keys.CopyTo(xValues, 0);
secondPersonsWithValues.Values.CopyTo(yValues, 0);
incomeExpenseChart.Series["Default"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Pie;
incomeExpenseChart.Series["Default"].Points.DataBindXY(xValues, yValues);
incomeExpenseChart.ChartAreas["Default"].Area3DStyle.Enable3D = true;
incomeExpenseChart.Series["Default"].CustomProperties = "PieLabelStyle=Outside";
incomeExpenseChart.Legends["Default"].Enabled = true;
incomeExpenseChart.ChartAreas["Default"].Area3DStyle.LightStyle = System.Windows.Forms.DataVisualization.Charting.LightStyle.Realistic;
incomeExpenseChart.Series["Default"]["PieDrawingStyle"] = "SoftEdge";
Basically i am querying data from database using the HistoryModel.getSecondPersonWithValues(); to get pairs as Dictionary<string, decimal> where key is the person and value is ammount.
Problem #1
What i need is to be able to change the marked labels from person names to the ammounts or add another label of ammounts with the same colors (See Image).
Problem #2
Another problem is that i need to change the view angle of 3D Pie chart. Maybe it's very simple and I just don't know the needed property or maybe i need to override some paint event. Either ways any kind of ways would be appriciated.
Thanks in advance George.

Solution for Problem #1
Adding new Label and filling with custom values helped.
In addition i changed the Series.IsValueShownAsLabel = true;
Solution for Problem #2
I should have set the ChartArea.Area3DStyle.IsClustered = true; and then set the ChartArea.Area3DStyle.Inclination;

Use xlhart.Rotation and xlchart.Elevation.

Dynamic Grid Measurements in WPF - Rendering Controls

I am working on a Drag and Drop Editor that is creating items and adding them dynamically to a WPF Canvas. For each item, it is creating a dynamic grid and addign that to the canvas. I need layout state information about each one of these grids as it is added so that I know its coordinates on the canvas. The problem I am having is that when I try to access the Height/ActualHeight/RenderedSize information of each of these Grids that I add, it always turns out to be 0. I am assuming that I might need to render the items so that the new state information is registered, but I am not quite sure how to do this. I have seen support through the InvalidateXXXX() methods that are provided, but I am not sure if/or which one I should be using. there is also an UpdateLayout() function, but I am not sure if this is what I need.
Here is the code that I have running through a loop and adding Grids, which represent LineItems in the Canvas.
/*Initialize Grid Layout*/
Grid newGrid = new Grid();
newGrid.MinHeight = 50;
newGrid.Width = PreviewWindow.ActualWidth;
newGrid.Background = Brushes.Beige;
newGrid.ShowGridLines = true;
/*Define Column Definitions*/
List<ColumnDefinition> columns = new List<ColumnDefinition>(fieldItemList.Count);
foreach (ColumnDefinition column in columns)
{
ColumnDefinition labelColumn = new ColumnDefinition();
newGrid.ColumnDefinitions.Add(labelColumn);
newGrid.ColumnDefinitions.Add(column);
}
/*Define Row Definitions*/
RowDefinition row = new RowDefinition();
newGrid.RowDefinitions.Add(row);
int colCount = 0;
for (int i = 0; i < fieldItemList.Count; i++)
{
FieldItem fieldItem = fieldItemList[i];
/*Initialize Example Label*/
Label label = new Label();
label.Content = fieldItem.Label;
Grid.SetRow(label, 0);
Grid.SetColumn(label, colCount);
newGrid.Children.Add(label);
/*Initialize Example Text Box*/
TextBox textBox = new TextBox();
Grid.SetRow(textBox, 0);
Grid.SetColumn(textBox, colCount + 1);
newGrid.Children.Add(textBox);
colCount++;
}
stackPanel.Children.Add(newGrid);
//I need to Access the Height of each of the grids here somehow
lastTop += (int)newGrid.ActualHeight ;
newGrid.InvalidateMeasure();
//Or InvalidateVisual(), or do I perform this on something else?
}
There is reference to a StackPanel, all of these Grids are being added to a stack panel, and they will eventuall be arranged by the coordinates(which I currently cannot grab). The problem is right now it is adding all these items to a list that will need to be sorted by the Top coordinate, but since the Top coordinate is 0, it will not sort correctly.

A few notes:
The StackPanel does not provide size Layout suggestions to its children, so the Grid will need to supply it's own Layout size. In order for this to work, you'll need to set the Row and Column sizes to "Auto" so that they expand to accommodate their contents. Even then, I'm not entirely sure if this works (usually you combine Auto with "*" rows or columns, rather than having all Auto columns, having them expand to a fixed or stretched overall Grid size.) The layout I've proposed here will behave a bit oddly, as it will dynamically resize columns based on the contents of the column text boxes; for instance, if you have no text in any row, you'll get zero width text boxes with only margin and border providing any size.
Once the StackPanel has had its children added, you'll need to call UpdateLayout on the StackPanel. This will cause it to compute the layout information for each of its children and then position them appropriately. This can become expensive if you keep adding grids dynamically, so fair warning.