C# WPF 使用触发器将样式 Object 添加到 Datagrid 中的单元格

Question

Using the answer from this thread Programmatically add style trigger

Style st = new Style();

DataTrigger tg = new DataTrigger()
{
    Binding = new Binding("PackageTechnology_c"),
    Value = "Plastic"
};

tg.Setters.Add(new Setter()
{
    Property = Control.BackgroundProperty,
    Value = ColorConverter.ConvertFromString("Red")
});

st.Triggers.Add(tg);  

I want to be able to add styles and trigger to my Datagrid at run time. Once I have created this style object, how to I add the style to my datagrid? I am not looking to do this in the XML, since I am dynamically creating styles are runtime. How do I do this with code-behind?

I tried:

datagrid.Style = st;

which results in this:

If I do:

datagrid.CellStyle = st;

then I get this:

But what I want is for the cell that has the value: "Plastic" inside the column "Package Technology" to turn red. Is there a way to achieve this?

Answer 1

What you're looking for is DataGridColumn.CellStyle . It will apply the given Style to all cells in that specific column, instead of every cell in the DataGrid .

Since you're auto-generating your columns, you would make use of the DataGrid.AutoGeneratingColumn event. It gets raised for each auto-generated column when it gets created. You can use the argument to check which column is being created, and if it is the PackageTechnologyc column then you would create and set the Style .

If you were defining your columns in XAML, you would have <DataGrid Name="datagrid"... , and then somewhere later <DataGridTextColumn Header="PackageTechnologyc"... . In that case you'd just add a Name to the DataGridTextColumn and then reference it like so: packageTechnologyColumn.Style = st; .