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トップC#に関する質問【VB.net】【Chart】積み上げ面グラフの境界線を消す方法

編集履歴

回答編集履歴

2

後から変える

2025/02/21 11:22

投稿

TN8001
TN8001

スコア9937

test CHANGED
@@ -35,7 +35,7 @@
35
35
  dt.Rows.Add(4, 1, 0, 0);
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  dt.Rows.Add(5, 0, 0, 0);
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37
 
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- var chart = new Chart()
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+ var chart = new Chart
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  {
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  DataSource = dt,
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  Dock = DockStyle.Fill,
@@ -45,19 +45,19 @@
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  chart.ChartAreas[0].AxisX.MajorGrid.Enabled = false;
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  chart.ChartAreas[0].AxisY.MajorGrid.Enabled = false;
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47
 
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  ChartType = SeriesChartType.StackedArea,
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  XValueMember = "x",
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  YValueMembers = "y1",
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  });
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  ChartType = SeriesChartType.StackedArea,
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  XValueMember = "x",
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  YValueMembers = "y2",
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  });
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  BorderWidth = 2,
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  BorderColor = Color.White,
@@ -91,14 +91,14 @@
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  {
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  InitializeComponent();
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- var chart = new Chart()
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+ var chart = new Chart
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  {
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  Dock = DockStyle.Fill,
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  Parent = this,
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  };
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  chart.ChartAreas.Add("");
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  ChartType = SeriesChartType.StackedArea,
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  Points = {
@@ -110,7 +110,7 @@
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  new DataPoint(5, 0),
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  },
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  });
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  ChartType = SeriesChartType.StackedArea,
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  Points = {
@@ -122,7 +122,7 @@
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  new DataPoint(5, 0) { Color = Color.Transparent, },
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  },
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  });
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- chart.Series.Add(new Series()
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+ chart.Series.Add(new Series
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  {
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  ChartType = SeriesChartType.StackedArea,
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  Points = {
@@ -138,4 +138,77 @@
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  }
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  }
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  ```
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+
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+ `DataSource`で入れているなら、後から変えてもいいです。
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+ ```cs
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+ using System.Data;
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+ using System.Drawing;
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+ using System.Windows.Forms;
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+ using System.Windows.Forms.DataVisualization.Charting;
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+
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+ namespace Qpq8e05s3vhidml
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+ {
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+ public partial class Form1 : Form
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+ {
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+ public Form1()
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+ {
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+ InitializeComponent();
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+
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+ var dt = new DataTable();
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+ dt.Columns.Add("x");
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+ dt.Columns.Add("y1");
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+ dt.Columns.Add("y2");
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+ dt.Columns.Add("y3");
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+ dt.Rows.Add(0, 2, 1, 1);
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+ dt.Rows.Add(1, 2, 0, 1);
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+ dt.Rows.Add(2, 2, 0, 1);
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+ dt.Rows.Add(3, 1, 0, 0);
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+ dt.Rows.Add(4, 1, 0, 0);
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+ dt.Rows.Add(5, 0, 0, 0);
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+
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+ var chart = new Chart
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+ {
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+ DataSource = dt,
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+ Dock = DockStyle.Fill,
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+ Parent = this,
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+ };
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+ chart.ChartAreas.Add("");
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+
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+ chart.Series.Add(new Series
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+ {
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+ ChartType = SeriesChartType.StackedArea,
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+ XValueMember = "x",
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+ YValueMembers = "y1",
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+ });
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+ chart.Series.Add(new Series
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+ {
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+ ChartType = SeriesChartType.StackedArea,
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+ XValueMember = "x",
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+ YValueMembers = "y2",
188
+ });
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+ chart.Series.Add(new Series
190
+ {
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+ ChartType = SeriesChartType.StackedArea,
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+ XValueMember = "x",
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+ YValueMembers = "y3",
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+ });
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+
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+ chart.DataBind();
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+ foreach (var series in chart.Series)
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+ {
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+ var p = series.Points;
200
+ if (p.Count < 2) continue;
201
+ for (var i = 1; i < p.Count; i++)
202
+ {
203
+ if (p[i - 1].YValues[0] == 0 && p[i].YValues[0] == 0)
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+ {
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+ p[i].Color = Color.Transparent;
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+ }
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+ }
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+ }
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+ }
210
+ }
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+ }
212
+ ```
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+
141
214
  ![いい感じグラフ](https://ddjkaamml8q8x.cloudfront.net/questions/2025-02-20/bf19afab-db87-4dd5-83ca-ed818f3176a5.png)

1

いい感じ

2025/02/20 05:06

投稿

TN8001
TN8001

スコア9937

test CHANGED
@@ -71,3 +71,71 @@
71
71
  }
72
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  ```
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  ![改善グラフ](https://ddjkaamml8q8x.cloudfront.net/questions/2025-02-19/585e4149-7a63-4c32-a661-4e7cb7b6005a.png)
74
+
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+ ---
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+
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+ 点ごとに色を変えることもできるんでしたっけ。
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+ [C#でグラフを作成して、特定の箇所のみ色を変更したいです](https://teratail.com/questions/214711)
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+
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+ 登録（時に連続０を見て色を変える）作業が面倒ですが、見た目はいいですね！^^
81
+ ```cs
82
+ using System.Drawing;
83
+ using System.Windows.Forms;
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+ using System.Windows.Forms.DataVisualization.Charting;
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+
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+ namespace Qpq8e05s3vhidml
87
+ {
88
+ public partial class Form1 : Form
89
+ {
90
+ public Form1()
91
+ {
92
+ InitializeComponent();
93
+
94
+ var chart = new Chart()
95
+ {
96
+ Dock = DockStyle.Fill,
97
+ Parent = this,
98
+ };
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+ chart.ChartAreas.Add("");
100
+
101
+ chart.Series.Add(new Series()
102
+ {
103
+ ChartType = SeriesChartType.StackedArea,
104
+ Points = {
105
+ new DataPoint(0, 2),
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+ new DataPoint(1, 2),
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+ new DataPoint(2, 2),
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+ new DataPoint(3, 1),
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+ new DataPoint(4, 1),
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+ new DataPoint(5, 0),
111
+ },
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+ });
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+ chart.Series.Add(new Series()
114
+ {
115
+ ChartType = SeriesChartType.StackedArea,
116
+ Points = {
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+ new DataPoint(0, 1),
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+ new DataPoint(1, 0),
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+ new DataPoint(2, 0) { Color = Color.Transparent, },
120
+ new DataPoint(3, 0) { Color = Color.Transparent, },
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+ new DataPoint(4, 0) { Color = Color.Transparent, },
122
+ new DataPoint(5, 0) { Color = Color.Transparent, },
123
+ },
124
+ });
125
+ chart.Series.Add(new Series()
126
+ {
127
+ ChartType = SeriesChartType.StackedArea,
128
+ Points = {
129
+ new DataPoint(0, 1),
130
+ new DataPoint(1, 1),
131
+ new DataPoint(2, 1),
132
+ new DataPoint(3, 0),
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+ new DataPoint(4, 0) { Color = Color.Transparent, },
134
+ new DataPoint(5, 0) { Color = Color.Transparent, },
135
+ },
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+ });
137
+ }
138
+ }
139
+ }
140
+ ```
141
+ ![いい感じグラフ](https://ddjkaamml8q8x.cloudfront.net/questions/2025-02-20/bf19afab-db87-4dd5-83ca-ed818f3176a5.png)