Winform中设置ZedGraph的X轴的刻度根据曲线获取

怼烎@ 2023-10-08 09:31 20阅读 0赞

## 场景 ##

Winforn中设置ZedGraph曲线图的属性、坐标轴属性、刻度属性：

[https://blog.csdn.net/BADAO\_LIUMANG\_QIZHI/article/details/100112573][https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100112573]

在对ZedGraph进行添加曲线时，需要对X轴的刻度进行赋值，需要一个string的数组。

并且在生成曲线时还要给曲线一个个坐标点的list。

如何在生成完曲线后直接从曲线中取得曲线的横坐标作为X轴的赋值。

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## 实现 ##

循环添加曲线

PointPairList list = null;
                    for (int i = 0; i < yList.Count; i++)
                    {
                        //循环添加曲线
                        foreach(DataTreeNode node in Global.Instance.PrepareCompareDataInOne)
                        {
                            IEnumerable<Entity.Record> record =  Global.Instance.VirtualData.RecordDataList.Where(p => p.CycleIndex == int.Parse(node.Id));
                            list = SetCurveTextInOne(yList[i].TitleKey,record);
                            LineItem myCurve = myPane.AddCurve(yList[i].Title, list, System.Drawing.ColorTranslator.FromHtml(yList[i].Color), SymbolType.None);
                            myCurve.YAxisIndex = i;                                                                 //很关键，对应使用那个坐标值
                        }
                    }

给曲线赋值

public static PointPairList SetCurveTextInOne(string yAxis,IEnumerable<Entity.Record> record)
            {
                PointPairList list = new PointPairList();
    
                #region 数据验证
    
                if (record == null)
                {
                    return list;
                }
    
                #endregion
    
                else
                {
                    //曲线赋值
                    int maxCtn = 0;      //最大点数
                    double y = 0.0;
                    int x =1;
                    List<Entity.Record> recordList = new List<Entity.Record>();
                    foreach (Entity.Record re in record)
                    {
                        maxCtn++;
                        recordList.Add(re);
                    }
                    Func<Entity.Record, object> getYValue = BaseHelper.EmitGetter<Entity.Record>(yAxis);
                  
                    for (int k = 0; k < recordList.Count; k++)
                    {
                        if (BaseHelper.IsExistsProperty<Entity.Record>(yAxis))
                        {
                           
                            object objY = getYValue(recordList[k]);
                            if (objY != null)
                            {
                                double.TryParse(objY.ToString(), out y);
                            }
                        }
                        list.Add(x, y, k+1); //添加一组数据(k：x数据点的索引，y：y的值，xTag：x的实际值)
                        x++;
                    }
                   
                    return list;
                }
    
            }

X轴的刻度值在曲线中获取

myPane.XAxis.Scale.TextLabels = list.Select<PointPair, string>(p => p.X.ToString()).ToArray<string>();         //X轴文本取值

### 效果 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70][]

[https_blog.csdn.net_BADAO_LIUMANG_QIZHI_article_details_100112573]: https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100112573
[https_blog.csdn.net_badao_liumang_qizhi]: https://blog.csdn.net/badao_liumang_qizhi
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191112090933525.jpg?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0JBREFPX0xJVU1BTkdfUUlaSEk=,size_16,color_FFFFFF,t_70