Interior SpreadsheetGear API Sample

// Create a new workbook and some local variables.
SpreadsheetGear.IWorkbook workbook = SpreadsheetGear.Factory.GetWorkbook();
SpreadsheetGear.IWorksheet worksheet = workbook.ActiveWorksheet;
SpreadsheetGear.IRange cells = worksheet.Cells;

// EXAMPLE 1: Set a variety of colors for the following cells
{
    cells["B2"].Interior.Color = SpreadsheetGear.Colors.Red;
    cells["C2"].Interior.Color = SpreadsheetGear.Colors.Orange;
    cells["D2"].Interior.Color = SpreadsheetGear.Colors.Yellow;
    cells["E2"].Interior.Color = SpreadsheetGear.Colors.Green;
    cells["F2"].Interior.Color = SpreadsheetGear.Colors.Blue;
    cells["G2"].Interior.Color = SpreadsheetGear.Colors.Purple;
}

// EXAMPLE 2: Use theme colors in combination with "tint and shade" 
// to demonstrate creating a fuller range of colors.
{
    SpreadsheetGear.Themes.ColorSchemeIndex[] themeColors = {
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent1,
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent2,
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent3,
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent4,
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent5,
        SpreadsheetGear.Themes.ColorSchemeIndex.Accent6
    };

    // Iterate through each theme color and set some range based 
    // off startingRange.
    SpreadsheetGear.IRange startingRange = cells["B4:B17"];
    for (int i = 0; i < themeColors.Length; i++)
    {
        SpreadsheetGear.IRange currentRange = startingRange.Offset(0, i);

        // Set the whole range to use the specified theme color.
        currentRange.Interior.ThemeColor = themeColors[i];

        // TintAndShade values of 1.0 and -1.0 indicate white and black, 
        // respectively.  Setting limits here to avoid displaying these max 
        // B&W values.
        double brightnessLimit = 0.9;
        double darknessLimit = -0.9;

        // Gradually darken the theme color as we iterate down the range
        for (int j = 0; j < currentRange.RowCount; j++)
        {
            currentRange[j, 0].Interior.TintAndShade = brightnessLimit - 
                (((double)j / (double)currentRange.RowCount) * 
                (brightnessLimit - darknessLimit));
        }
    }
}

// EXAMPLE 3: Set I2:J4 to a red and yellow pattern.
{
    SpreadsheetGear.IInterior interior = cells["I2:J4"].Interior;
    interior.Color = SpreadsheetGear.Colors.Red;
    interior.Pattern = SpreadsheetGear.Pattern.Gray16;
    interior.PatternColor = SpreadsheetGear.Colors.Yellow;
}

// EXAMPLE 4: Set each cell in I6:J8 to a linear gradient.
{
    SpreadsheetGear.IInterior interior = cells["I6:J8"].Interior;
    interior.Pattern = SpreadsheetGear.Pattern.LinearGradient;
                
    // Get a reference to the linear gradient.
    SpreadsheetGear.ILinearGradient linearGradient =
        interior.Gradient as SpreadsheetGear.ILinearGradient;

    // Set the angle of the linear gradient to 90 degrees.
    linearGradient.Degree = 45;
}

// EXAMPLE 5: Set I10:J12 to a rectangular gradient.
{
    SpreadsheetGear.IInterior interior = cells["I10:J12"].Interior;
    interior.Pattern = SpreadsheetGear.Pattern.RectangularGradient;

    // Merge the cells.
    cells["I10:J12"].Merge();

    // Get a reference to the rectangular gradient.
    SpreadsheetGear.IRectangularGradient rectGradient =
        interior.Gradient as SpreadsheetGear.IRectangularGradient;

    // Set the rectangular gradient to fill from center.
    rectGradient.RectangleBottom = 0.5;
    rectGradient.RectangleLeft = 0.5;
    rectGradient.RectangleRight = 0.5;
    rectGradient.RectangleTop = 0.5;

    // Get a reference to the rectangular gradient color stops.
    SpreadsheetGear.IColorStops colorStops = rectGradient.ColorStops;

    // Clear the default color stops.
    colorStops.Clear();

    // Add custom color stops.
    colorStops.Add(0.0).Color = SpreadsheetGear.Colors.White;
    colorStops.Add(1.0).ThemeColor = SpreadsheetGear.Themes.ColorSchemeIndex.Accent6;
}