设置图表外观

设置图表外观

在如何创建图表中，我们简要介绍了 Aspose.Cells 提供的图表类型和图表对象，并描述了如何创建图表。本文讨论如何通过设置图表的属性来自定义图表的外观：

• 设置图表区域。
• 设置图表线。
• 应用主题。
• 设置图表和坐标轴的标题。
• 使用网格线。

设置图表区

图表中有不同类型的区域，Aspose.Cells 提供了修改每个区域外观的灵活性。开发人员可以通过更改前景色、背景色和填充格式等，在一个区域上应用不同的格式设置。

在下面给出的示例中，我们对图表的不同类型区域应用了不同的格式设置。这些领域包括：

• 地块面积
• 图表区
• 系列收藏区
• SeriesCollection 中单个点的面积

以下代码片段演示了如何设置图表区域。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.Worksheets.Add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[sheetIndex];

// Adding sample values to cells
worksheet.Cells["A1"].PutValue(50);
worksheet.Cells["A2"].PutValue(100);
worksheet.Cells["A3"].PutValue(150);
worksheet.Cells["B1"].PutValue(60);
worksheet.Cells["B2"].PutValue(32);
worksheet.Cells["B3"].PutValue(50);

// Adding a chart to the worksheet
int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.NSeries.Add("A1:B3", true);

// Setting the foreground color of the plot area
chart.PlotArea.Area.ForegroundColor = Color.Blue;

// Setting the foreground color of the chart area
chart.ChartArea.Area.ForegroundColor = Color.Yellow;

// Setting the foreground color of the 1st SeriesCollection area
chart.NSeries[0].Area.ForegroundColor = Color.Red;

// Setting the foreground color of the area of the 1st SeriesCollection point
chart.NSeries[0].Points[0].Area.ForegroundColor = Color.Cyan;

// Filling the area of the 2nd SeriesCollection with a gradient
chart.NSeries[1].Area.FillFormat.SetOneColorGradient(Color.Lime, 1, Aspose.Cells.Drawing.GradientStyleType.Horizontal, 1);

// Saving the Excel file
workbook.Save(dataDir + "book1.out.xls");

设置图表线

开发人员还可以在线条或数据标记上应用不同类型的样式系列合集.以下代码片段演示了如何使用 Aspose.Cells API 设置图表线条。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.Worksheets.Add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[sheetIndex];

// Adding sample values to cells
worksheet.Cells["A1"].PutValue(50);
worksheet.Cells["A2"].PutValue(100);
worksheet.Cells["A3"].PutValue(150);
worksheet.Cells["B1"].PutValue(60);
worksheet.Cells["B2"].PutValue(32);
worksheet.Cells["B3"].PutValue(50);

// Adding a chart to the worksheet
int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.NSeries.Add("A1:B3", true);

// Setting the foreground color of the plot area
chart.PlotArea.Area.ForegroundColor = Color.Blue;

// Setting the foreground color of the chart area
chart.ChartArea.Area.ForegroundColor = Color.Yellow;

// Setting the foreground color of the 1st SeriesCollection area
chart.NSeries[0].Area.ForegroundColor = Color.Red;

// Setting the foreground color of the area of the 1st SeriesCollection point
chart.NSeries[0].Points[0].Area.ForegroundColor = Color.Cyan;

// Filling the area of the 2nd SeriesCollection with a gradient
chart.NSeries[1].Area.FillFormat.SetOneColorGradient(Color.Lime, 1, Aspose.Cells.Drawing.GradientStyleType.Horizontal, 1);

// Applying a dotted line style on the lines of a SeriesCollection
chart.NSeries[0].Border.Style = Aspose.Cells.Drawing.LineType.Dot;

// Applying a triangular marker style on the data markers of a SeriesCollection
chart.NSeries[0].Marker.MarkerStyle = Aspose.Cells.Charts.ChartMarkerType.Triangle;

// Setting the weight of all lines in a SeriesCollection to medium
chart.NSeries[1].Border.Weight = Aspose.Cells.Drawing.WeightType.MediumLine;


// Saving the Excel file
workbook.Save(dataDir + "book1.out.xls");

将 Microsoft Excel 2007/2010 主题应用于图表

开发人员可以将不同的 Microsoft Excel 主题/颜色应用到系列合集或其他图表对象，如下例所示。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Instantiate the workbook to open the file that contains a chart
Workbook workbook = new Workbook(dataDir + "book1.xlsx");

// Get the first worksheet
Worksheet worksheet = workbook.Worksheets[1];

// Get the first chart in the sheet
Chart chart = worksheet.Charts[0];

// Specify the FilFormat's type to Solid Fill of the first series
chart.NSeries[0].Area.FillFormat.FillType = Aspose.Cells.Drawing.FillType.Solid;

// Get the CellsColor of SolidFill
CellsColor cc = chart.NSeries[0].Area.FillFormat.SolidFill.CellsColor;

// Create a theme in Accent style
cc.ThemeColor = new ThemeColor(ThemeColorType.Accent6, 0.6);

// Apply the them to the series
chart.NSeries[0].Area.FillFormat.SolidFill.CellsColor = cc;

// Save the Excel file
workbook.Save(dataDir + "output.out.xlsx");

设置图表或坐标轴的标题

您可以使用 Microsoft Excel 在所见即所得环境中设置图表的标题及其轴。 Aspose.Cells 还允许开发人员在运行时设置图表的标题及其轴。所有图表及其轴都包含一个标题可用于设置其标题的属性，如下例所示。

以下代码片段演示了如何为图表和坐标轴设置标题。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.Worksheets.Add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[sheetIndex];

// Adding sample values to cells
worksheet.Cells["A1"].PutValue(50);
worksheet.Cells["A2"].PutValue(100);
worksheet.Cells["A3"].PutValue(150);
worksheet.Cells["B1"].PutValue(60);
worksheet.Cells["B2"].PutValue(32);
worksheet.Cells["B3"].PutValue(50);

// Adding a chart to the worksheet
int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.NSeries.Add("A1:B3", true);

// Setting the foreground color of the plot area
chart.PlotArea.Area.ForegroundColor = Color.Blue;

// Setting the foreground color of the chart area
chart.ChartArea.Area.ForegroundColor = Color.Yellow;

// Setting the foreground color of the 1st SeriesCollection area
chart.NSeries[0].Area.ForegroundColor = Color.Red;

// Setting the foreground color of the area of the 1st SeriesCollection point
chart.NSeries[0].Points[0].Area.ForegroundColor = Color.Cyan;

// Filling the area of the 2nd SeriesCollection with a gradient
chart.NSeries[1].Area.FillFormat.SetOneColorGradient(Color.Lime, 1, Aspose.Cells.Drawing.GradientStyleType.Horizontal, 1);

// Setting the title of a chart
chart.Title.Text = "Title";

// Setting the font color of the chart title to blue
chart.Title.Font.Color = Color.Blue;

// Setting the title of category axis of the chart
chart.CategoryAxis.Title.Text = "Category";

// Setting the title of value axis of the chart
chart.ValueAxis.Title.Text = "Value";


// Saving the Excel file
workbook.Save(dataDir + "book1.out.xls");

使用主要网格线

可以自定义主要网格线的外观。隐藏或显示网格线，或定义它们的颜色和其他设置。下面，我们将展示如何隐藏网格线以及如何更改它们的颜色。

隐藏主要网格线

开发人员可以通过设置可见的财产线反对真的要么错误的.

以下代码片段演示了如何隐藏主要网格线。隐藏主要网格线后，工作表中将添加一个没有网格线的柱形图。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.Worksheets.Add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[sheetIndex];

// Adding sample values to cells
worksheet.Cells["A1"].PutValue(50);
worksheet.Cells["A2"].PutValue(100);
worksheet.Cells["A3"].PutValue(150);
worksheet.Cells["B1"].PutValue(60);
worksheet.Cells["B2"].PutValue(32);
worksheet.Cells["B3"].PutValue(50);

// Adding a chart to the worksheet
int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.NSeries.Add("A1:B3", true);

// Setting the foreground color of the plot area
chart.PlotArea.Area.ForegroundColor = Color.Blue;

// Setting the foreground color of the chart area
chart.ChartArea.Area.ForegroundColor = Color.Yellow;

// Setting the foreground color of the 1st SeriesCollection area
chart.NSeries[0].Area.ForegroundColor = Color.Red;

// Setting the foreground color of the area of the 1st SeriesCollection point
chart.NSeries[0].Points[0].Area.ForegroundColor = Color.Cyan;

// Filling the area of the 2nd SeriesCollection with a gradient
chart.NSeries[1].Area.FillFormat.SetOneColorGradient(Color.Lime, 1, Aspose.Cells.Drawing.GradientStyleType.Horizontal, 1);

// Hiding the major gridlines of Category Axis
chart.CategoryAxis.MajorGridLines.IsVisible = false;

// Hiding the major gridlines of Value Axis
chart.ValueAxis.MajorGridLines.IsVisible = false;


// Saving the Excel file
workbook.Save(dataDir + "book1.out.xls");

更改主要网格线设置

开发人员不仅可以控制主要网格线的可见性，还可以控制其他属性，包括颜色等。

以下代码片段演示了如何更改主要网格线的颜色。设置主要网格线的颜色后，将在工作表中添加一个修改了网格线的柱形图。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

// Create directory if it is not already present.
bool IsExists = System.IO.Directory.Exists(dataDir);
if (!IsExists)
    System.IO.Directory.CreateDirectory(dataDir);

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.Worksheets.Add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.Worksheets[sheetIndex];

// Adding sample values to cells
worksheet.Cells["A1"].PutValue(50);
worksheet.Cells["A2"].PutValue(100);
worksheet.Cells["A3"].PutValue(150);
worksheet.Cells["B1"].PutValue(60);
worksheet.Cells["B2"].PutValue(32);
worksheet.Cells["B3"].PutValue(50);

// Adding a chart to the worksheet
int chartIndex = worksheet.Charts.Add(Aspose.Cells.Charts.ChartType.Column, 5, 0, 15, 5);

// Accessing the instance of the newly added chart
Aspose.Cells.Charts.Chart chart = worksheet.Charts[chartIndex];

// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"
chart.NSeries.Add("A1:B3", true);

// Setting the foreground color of the plot area
chart.PlotArea.Area.ForegroundColor = Color.Blue;

// Setting the foreground color of the chart area
chart.ChartArea.Area.ForegroundColor = Color.Yellow;

// Setting the foreground color of the 1st SeriesCollection area
chart.NSeries[0].Area.ForegroundColor = Color.Red;

// Setting the foreground color of the area of the 1st SeriesCollection point
chart.NSeries[0].Points[0].Area.ForegroundColor = Color.Cyan;

// Filling the area of the 2nd SeriesCollection with a gradient
chart.NSeries[1].Area.FillFormat.SetOneColorGradient(Color.Lime, 1, Aspose.Cells.Drawing.GradientStyleType.Horizontal, 1);

// Setting the color of Category Axis' major gridlines to silver
chart.CategoryAxis.MajorGridLines.Color = Color.Silver;

// Setting the color of Value Axis' major gridlines to red
chart.ValueAxis.MajorGridLines.Color = Color.Red;


// Saving the Excel file
workbook.Save(dataDir + "book1.out.xls");

推进主题

• 设置图表系列的值格式代码
• 将图片设置为背景填充图表