C# – How to change background color of a cell in Devexpress Grid

cdevexpressgridxtragrid

I have a devexpress xtragrid with 40 columns.
I compare each cell value with other and if it is different then I want to change the cell background color.
I try with GridViewInfo but it only takes the columns that are visible on the screen.But I want to do for all the columns.(Not with RowCellStyle)
Do you have a solution for that?
Thank you!

Best Answer

You need to handle the CustomDrawCell of your GridView, here is a snip of code that change the color of the Name column, based on an other column valoe (age column)

private void gridView_CustomDrawCell(object sender, RowCellCustomDrawEventArgs e)
    {
        if (e.Column == colName)
        {
            var age = Convert.ToInt32(gridView.GetRowCellValue(e.RowHandle, colAge));
            if (age < 18)
                e.Appearance.BackColor = Color.FromArgb(0xFE, 0xDF, 0x98);
            else
                e.Appearance.BackColor = Color.FromArgb(0xD2, 0xFD, 0x91);
        }
    }

Good luck

Related Solutions

C# – String representation of an Enum

Try type-safe-enum pattern.

public sealed class AuthenticationMethod {

    private readonly String name;
    private readonly int value;

    public static readonly AuthenticationMethod FORMS = new AuthenticationMethod (1, "FORMS");
    public static readonly AuthenticationMethod WINDOWSAUTHENTICATION = new AuthenticationMethod (2, "WINDOWS");
    public static readonly AuthenticationMethod SINGLESIGNON = new AuthenticationMethod (3, "SSN");        

    private AuthenticationMethod(int value, String name){
        this.name = name;
        this.value = value;
    }

    public override String ToString(){
        return name;
    }

}

Update Explicit (or implicit) type conversion can be done by

adding static field with mapping
```
private static readonly Dictionary<string, AuthenticationMethod> instance = new Dictionary<string,AuthenticationMethod>();
```
- n.b. In order that the initialisation of the the "enum member" fields doesn't throw a NullReferenceException when calling the instance constructor, be sure to put the Dictionary field before the "enum member" fields in your class. This is because static field initialisers are called in declaration order, and before the static constructor, creating the weird and necessary but confusing situation that the instance constructor can be called before all static fields have been initialised, and before the static constructor is called.
filling this mapping in instance constructor
```
instance[name] = this;
```

and adding user-defined type conversion operator

public static explicit operator AuthenticationMethod(string str)
{
    AuthenticationMethod result;
    if (instance.TryGetValue(str, out result))
        return result;
    else
        throw new InvalidCastException();
}

C# – Case insensitive ‘Contains(string)’

You could use the String.IndexOf Method and pass StringComparison.OrdinalIgnoreCase as the type of search to use:

string title = "STRING";
bool contains = title.IndexOf("string", StringComparison.OrdinalIgnoreCase) >= 0;

Even better is defining a new extension method for string:

public static class StringExtensions
{
    public static bool Contains(this string source, string toCheck, StringComparison comp)
    {
        return source?.IndexOf(toCheck, comp) >= 0;
    }
}

Note, that null propagation ?. is available since C# 6.0 (VS 2015), for older versions use

if (source == null) return false;
return source.IndexOf(toCheck, comp) >= 0;

USAGE:

string title = "STRING";
bool contains = title.Contains("string", StringComparison.OrdinalIgnoreCase);

Best Answer

Related Solutions

C# – String representation of an Enum

C# – Case insensitive ‘Contains(string)’

Related Topic