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我有一个包含日期和数据大小的表。当我导出列表时,其数据显示为

11/1/10|1  
11/2/10|2  
11/3/10|16  

我只是想从这些数据中创建一个折线图,但是当我看到它是否被绘制时,该图从未被绘制,还有没有办法将 x 轴从 0-100 编号更改为列出的日期?

private void CreateGraph_DataSource(ZedGraphControl zedGraphControl1)
{
    string project = listBox1.SelectedItem.ToString();
    string sql = "select date,datasize from dbo.x where project = '"+project+"' order by date";
    DataTable projects = null;
    SqlDataAdapter dataadapt = null;
    SqlConnection con = new SqlConnection("Data Source= W ;Initial Catalog= ding;Integrated Security= SSPI");
    con.Open();
    SqlCommand cmd = new SqlCommand(sql, con);
    cmd.ExecuteNonQuery();
    projects = new DataTable();
    dataadapt = new SqlDataAdapter(cmd);
    dataadapt.Fill(projects);
    con.Close();
    GraphPane myPane = zedGraphControl1.GraphPane;
    myPane.Title.Text = project;
    myPane.YAxis.Title.Text = "Size";
    myPane.XAxis.Title.Text = "Date";
    DataSourcePointList dsp = new DataSourcePointList();
    dsp.DataSource = projects;
    dsp.XDataMember = "Date";
    dsp.YDataMember = "DataSize";
    LineItem myCurve = myPane.AddCurve("DataSize", dsp, Color.DarkViolet);
    myCurve.Line.Fill = new Fill(Color.Red, Color.White);
    LineItem myCurve2 = myPane.AddCurve("Date", dsp, Color.DarkViolet);
    myCurve2.Line.Fill = new Fill(Color.Green, Color.White);
    myCurve.Line.Width = 2.0F;
    myCurve2.Line.Width = 2.0F;
    zedGraphControl1.AxisChange();
    myPane.XAxis.Type = AxisType.Date;
}

编辑:

对不起,它似乎是图形,但缩放真的很糟糕,有没有办法设置缩放开始?

解决了。

4

1 回答 1

1

您需要告诉 ZedGraph 该轴是日期类型:

myPane.XAxis.Type = AxisType.Date;

虽然它不使用数据源,但有一个关于使用日期轴类型的教程。

于 2010-11-19T16:49:25.933 回答