/// <summary>
/// 把xml转化为图片
/// </summary>
/// <param name="xml"></param>
/// <param name="param"></param>
/// <returns></returns>
public Image XmlToImage(string xml, Dictionary <string, object> param = null)
{
DrawImg drawImg = XmlToDrawImg(xml, param);
Image image = DrawTree(drawImg);
Dispose(drawImg);
return(image);
}
/// <summary>
/// 根据drawImg树结构进行绘图
/// </summary>
/// <param name="drawImg">drawImg树结构</param>
/// <returns>返回绘制的图片</returns>
public Image DrawTree(DrawImg drawImg)
{
Bitmap bitmap = new Bitmap(drawImg.Width, drawImg.Height);
using (Graphics g = Graphics.FromImage(bitmap))
{
Image background = null;
if (!string.IsNullOrEmpty(drawImg.BackgroundUrl))
{
WebResponse webResponse = HttpWebRequestHelper.HttpGet(drawImg.BackgroundUrl);
background = webResponse.GetBitmap();
}
else if (!string.IsNullOrEmpty(drawImg.BackgroundPath))
{
background = Image.FromFile(drawImg.BackgroundPath);
}
else if (drawImg.BackgroundImage != null)
{
background = drawImg.BackgroundImage;
}
if (drawImg.BackgroundColor != null)
{
g.FillRectangle(new SolidBrush(drawImg.BackgroundColor), new Rectangle(0, 0, drawImg.Width, drawImg.Height));
}
if (background != null)
{
g.DrawImage(background, new Rectangle(0, 0, drawImg.Width, drawImg.Height));
}
if (drawImg.DrawList != null && drawImg.DrawList.Count > 0)
{
foreach (Draw childDraw in drawImg.DrawList)
{
if (childDraw.GetType() == typeof(DrawImg))
{
DrawImg tempDrawImg = (DrawImg)childDraw;
using (Image childImage = DrawTree(tempDrawImg))
{
childImage.RotateFlip(tempDrawImg.Rotate);
g.DrawImage(childImage, new Rectangle(childDraw.Left, childDraw.Top, childImage.Width, childImage.Height));
}
}
else if (childDraw.GetType() == typeof(DrawText))
{
DrawText tempDrawText = (DrawText)childDraw;
Font font = new Font(tempDrawText.FontFamily, tempDrawText.FontSize, tempDrawText.FontStyle);
RectangleF rectangleF = new RectangleF(tempDrawText.Left, tempDrawText.Top, tempDrawText.Width, tempDrawText.Height);
g.DrawString(tempDrawText.Text, font, new SolidBrush(tempDrawText.FontColor), rectangleF);
}
}
}
g.Save();
}
return(bitmap);
}
/// <summary>
/// 对常量属性进行赋值
/// </summary>
/// <param name="drawImg"></param>
/// <param name="xmlAttr"></param>
void AttrConstSet(DrawImg drawImg, XmlAttribute xmlAttr)
{
if (string.Equals(xmlAttr.Name, "Width", StringComparison.CurrentCultureIgnoreCase))
{
int width;
if (int.TryParse(xmlAttr.Value, out width))
{
drawImg.Width = width;
}
}
else if (string.Equals(xmlAttr.Name, "Height", StringComparison.CurrentCultureIgnoreCase))
{
int height;
if (int.TryParse(xmlAttr.Value, out height))
{
drawImg.Height = height;
}
}
else if (string.Equals(xmlAttr.Name, "Left", StringComparison.CurrentCultureIgnoreCase))
{
int left;
if (int.TryParse(xmlAttr.Value, out left))
{
drawImg.Left = left;
}
}
else if (string.Equals(xmlAttr.Name, "Top", StringComparison.CurrentCultureIgnoreCase))
{
int top;
if (int.TryParse(xmlAttr.Value, out top))
{
drawImg.Top = top;
}
}
else if (string.Equals(xmlAttr.Name, "BackgroundPath", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundPath = xmlAttr.Value;
}
else if (string.Equals(xmlAttr.Name, "BackgroundUrl", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundUrl = xmlAttr.Value;
}
else if (string.Equals(xmlAttr.Name, "Rotate", StringComparison.CurrentCultureIgnoreCase))
{
foreach (var item in Enum.GetValues(typeof(RotateFlipType)))
{
if (string.Equals(xmlAttr.Value, item.ToString(), StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Rotate = (RotateFlipType)item;
break;
}
}
}
}
/// <summary>
/// 对变量属性进行赋值
/// </summary>
/// <param name="drawImg"></param>
/// <param name="xmlAttr"></param>
/// <param name="param"></param>
void AttrVarSet(DrawImg drawImg, XmlAttribute xmlAttr, Dictionary <string, object> param)
{
if (param.ContainsKey(xmlAttr.Value))
{
try
{
if (string.Equals(xmlAttr.Name, "ref-Width", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Width = (int)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-Height", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Height = (int)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-Left", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Left = (int)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-Top", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Top = (int)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-BackgroundPath", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundPath = (string)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-BackgroundUrl", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundUrl = (string)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-BackgroundImage", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundImage = (Image)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-BackgroundColor", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.BackgroundColor = (Color)param[xmlAttr.Value];
}
else if (string.Equals(xmlAttr.Name, "ref-Rotate", StringComparison.CurrentCultureIgnoreCase))
{
drawImg.Rotate = (RotateFlipType)param[xmlAttr.Value];
}
}
catch (Exception ex)
{
Console.WriteLine($"设置动态属性时出错，错误原因：{ex.Message}");
}
}
}
/// <summary>
/// 把节点解析成DrawImg对象
/// </summary>
/// <param name="xmlNodeList"></param>
/// <param name="param"></param>
/// <returns></returns>
List <Draw> NodeToDrawImg(XmlNodeList xmlNodeList, Dictionary <string, object> param = null)
{
List <Draw> drawList = new List <Draw>();
bool paramIsNotNull = param != null;
foreach (XmlNode xmlNode in xmlNodeList)
{
if (xmlNode.NodeType == XmlNodeType.Element)
{
if (string.Equals(xmlNode.Name, "drawImg", StringComparison.CurrentCultureIgnoreCase))
{
DrawImg drawImg = new DrawImg();
foreach (XmlAttribute xmlAttr in xmlNode.Attributes)
{
if (paramIsNotNull)
{
AttrVarSet(drawImg, xmlAttr, param);
}
AttrConstSet(drawImg, xmlAttr);
}
drawList.Add(drawImg);
if (xmlNode.HasChildNodes)
{
drawImg.DrawList = NodeToDrawImg(xmlNode.ChildNodes, param);
}
}
else if (string.Equals(xmlNode.Name, "drawText", StringComparison.CurrentCultureIgnoreCase))
{
DrawText drawText = new DrawText();
foreach (XmlAttribute xmlAttr in xmlNode.Attributes)
{
if (paramIsNotNull)
{
AttrVarSet(drawText, xmlAttr, param);
}
AttrConstSet(drawText, xmlAttr);
}
drawList.Add(drawText);
}
}
}
return(drawList);
}
/// <summary>
/// 执行与释放或重置非托管资源相关的应用程序定义的任务
/// </summary>
public void Dispose(DrawImg drawImg)
{
bool hasChild = drawImg.DrawList != null && drawImg.DrawList.Count > 0;
if (hasChild)
{
foreach (Draw childDraw in drawImg.DrawList)
{
if (childDraw.GetType() == typeof(DrawImg))
{
DrawImg tempDrawImg = (DrawImg)childDraw;
using (tempDrawImg.BackgroundImage) { }
Dispose(tempDrawImg);
}
}
}
else
{
using (drawImg.BackgroundImage) { }
}
}
