This article mainly introduces the steps to implement a step control using C#, which has a good reference value. Let’s take a look at it with the editor.
There are many javascript controls now, which are very good, among which step is one, as shown in the figure below:
So how to use C# to implement a step control?
First define a StepEntity class to store the information of the step bar node :
public class StepEntity
{
public string Id { get; set; }
public string StepName { get; set; }
public int StepOrder { get; set; }
public eumStepState StepState { get; set; }
public string StepDesc { get; set; }
public object StepTag { get; set; }
//public Image StepCompletedImage { get; set; }
//public Image StepDoingImage { get; set; }
public StepEntity(string id,string stepname,int steporder,string stepdesc, eumStepState stepstate,object tag)
{
this.Id = id;
this.StepName = stepname;
this.StepOrder = steporder;
this.StepDesc = stepdesc;
this.StepTag = tag;
this.StepState = stepstate;
}
}Define a user control named StepViewer.
public partial class StepViewer : UserControl
{
public StepViewer()
{
InitializeComponent();
this.Height = 68;
}
}Define a ListDataSource property in the StepViewer user control, as follows:
private List<StepEntity> _dataSourceList = null;
[Browsable(true), Category("StepViewer")]
public List<StepEntity> ListDataSource
{
get
{
return _dataSourceList;
}
set
{
if (_dataSourceList != value)
{
_dataSourceList = value;
Invalidate();
}
}
}In the paint method of this control, perform the steps Drawing of bars:
private void StepViewer_Paint(object sender, PaintEventArgs e)
{
if(this.ListDataSource!=null)
{
int CenterY = this.Height / 2;
int index = 1;
int count = ListDataSource.Count;
int lineWidth = 120;
int StepNodeWH = 28;
//this.Width = 32 * count + lineWidth * (count - 1) + 6+300;
//defalut pen & brush
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Brush brush = new SolidBrush(_Gray);
Pen p = new Pen(brush, 1f);
Brush brushNode = new SolidBrush(_DarkGray);
Pen penNode = new Pen(brushNode, 1f);
Brush brushNodeCompleted = new SolidBrush(_Blue);
Pen penNodeCompleted = new Pen(brushNodeCompleted, 1f);
int initX = 6;
//string
Font nFont = new Font("微软雅黑", 12);
Font stepFont = new Font("微软雅黑", 11,FontStyle.Bold);
int NodeNameWidth = 0;
foreach (var item in ListDataSource)
{
//round
Rectangle rec = new Rectangle(initX, CenterY - StepNodeWH / 2, StepNodeWH, StepNodeWH);
if (CurrentStep == item.StepOrder)
{
if (item.StepState == eumStepState.OutTime)
{
e.Graphics.DrawEllipse(new Pen(_Red,1f), rec);
e.Graphics.FillEllipse(new SolidBrush(_Red), rec);
}
else
{
e.Graphics.DrawEllipse(penNodeCompleted, rec);
e.Graphics.FillEllipse(brushNodeCompleted, rec);
}
//白色字体
SizeF fTitle = e.Graphics.MeasureString(index.ToString(), stepFont);
Point pTitle = new Point(initX + StepNodeWH / 2 - (int)Math.Round(fTitle.Width) / 2, CenterY - (int)Math.Round(fTitle.Height / 2));
e.Graphics.DrawString(index.ToString(), stepFont, Brushes.White, pTitle);
//nodeName
SizeF sNode = e.Graphics.MeasureString(item.StepName, nFont);
Point pNode = new Point(initX + StepNodeWH, CenterY - (int)Math.Round(sNode.Height / 2) + 2);
e.Graphics.DrawString(item.StepName,new Font( nFont,FontStyle.Bold), brushNode, pNode);
NodeNameWidth = (int)Math.Round(sNode.Width);
if (index < count)
{
e.Graphics.DrawLine(p, initX + StepNodeWH + NodeNameWidth, CenterY, initX + StepNodeWH + NodeNameWidth + lineWidth, CenterY);
}
}
else if (item.StepOrder < CurrentStep)
{
//completed
e.Graphics.DrawEllipse(penNodeCompleted, rec);
//image
RectangleF recRF = new RectangleF(rec.X + 6, rec.Y + 6, rec.Width - 12, rec.Height - 12);
e.Graphics.DrawImage(ControlsResource.check_lightblue, recRF);
//nodeName
SizeF sNode = e.Graphics.MeasureString(item.StepName, nFont);
Point pNode = new Point(initX + StepNodeWH, CenterY - (int)Math.Round(sNode.Height / 2) + 2);
e.Graphics.DrawString(item.StepName, nFont, brushNode, pNode);
NodeNameWidth = (int)Math.Round(sNode.Width);
if (index < count)
{
e.Graphics.DrawLine(penNodeCompleted, initX + StepNodeWH + NodeNameWidth,
CenterY, initX + StepNodeWH + NodeNameWidth + lineWidth, CenterY);
}
}
else
{
e.Graphics.DrawEllipse(p, rec);
//
SizeF fTitle = e.Graphics.MeasureString(index.ToString(), stepFont);
Point pTitle = new Point(initX + StepNodeWH / 2 - (int)Math.Round(fTitle.Width) / 2, CenterY - (int)Math.Round(fTitle.Height / 2));
e.Graphics.DrawString(index.ToString(), stepFont, brush, pTitle);
//nodeName
SizeF sNode = e.Graphics.MeasureString(item.StepName, nFont);
Point pNode = new Point(initX + StepNodeWH, CenterY - (int)Math.Round(sNode.Height / 2) + 2);
e.Graphics.DrawString(item.StepName, nFont, brushNode, pNode);
NodeNameWidth = (int)Math.Round(sNode.Width);
if (index < count)
{
//line
e.Graphics.DrawLine(p, initX + StepNodeWH + NodeNameWidth, CenterY, initX + StepNodeWH + NodeNameWidth + lineWidth, CenterY);
}
}
//描述信息
if (item.StepDesc != "")
{
Point pNode = new Point(initX + StepNodeWH, CenterY+10);
e.Graphics.DrawString(item.StepDesc,new Font(nFont.FontFamily,10),brush, pNode);
}
index++;
//8 is space width
initX = initX + lineWidth + StepNodeWH+ NodeNameWidth+8;
}
}
}Use of controls:
List<StepEntity> list = new List<StepEntity>();
list.Add(new StepEntity("1", "新开单", 1, "这里是该步骤的描述信息", eumStepState.Completed, null));
list.Add(new StepEntity("2", "主管审批", 2, "这里是该步骤的描述信息", eumStepState.Waiting, null));
list.Add(new StepEntity("3", "总经理审批", 3, "这里是该步骤的描述信息", eumStepState.OutTime, null));
list.Add(new StepEntity("2", "完成", 4, "这里是该步骤的描述信息", eumStepState.Waiting, null));
this.stepViewer1.CurrentStep = 3;
this.stepViewer1.ListDataSource = list;
Similarly, we can achieve the following timeline control.
The above is the detailed content of Detailed code explanation for developing step bar control in C# (picture). For more information, please follow other related articles on the PHP Chinese website!
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