1public Bitmap GetLegendImage(Map map, int width, int height, int printResolution, string legendTitle)
2        {
3            Bitmap legendImage = null;
4            #region "Trying to get the legend information"   ...
5
6
7            Dictionary<string, KeyValuePair<string, CartoImage>> legendInfo = new Dictionary<string, KeyValuePair<string, CartoImage>>();
8            int layerCounter = 0;
9            foreach (IMapResource item in map.MapResourceManagerInstance.GetResources())
10            {
11                // just in case one of the map services isn't working, but others are...
12                // ...or if the map resource is invisible, skip to next resource
13                IMapTocFunctionality mtoc = item.CreateFunctionality(typeof(IMapTocFunctionality), Guid.NewGuid().ToString()) as IMapTocFunctionality;
14                if (mtoc == null)
15                    continue;
16
17                IMapFunctionality mf = null;
18                foreach (IGISFunctionality entry in item.Functionalities)
19                {
20                    if (entry is IMapFunctionality)
21                        mf = entry as IMapFunctionality;
22                }
23                if (mf == null || !mf.DisplaySettings.Visible)
24                    continue;
25
26                TocDataFrame[] tocDataFrames = mtoc.GetMapContents(mf.Name, WebImageFormat.PNG24, true, false);
27                foreach (TocDataFrame tocDataFrame in tocDataFrames)
28                {
29                    foreach (TocLayer tocLayer in tocDataFrame)
30                    {
31                        if (tocLayer.Visible)
32                        {
33                            List<KeyValuePair<string, CartoImage>> legends = GetLegendImages(tocLayer);
34                            if (legends != null && legends.Count > 0)
35                            {
36                                foreach (KeyValuePair<string, CartoImage> entry in legends)
37                                {
38                                    legendInfo.Add(layerCounter.ToString(), new KeyValuePair<string, CartoImage>(entry.Key, entry.Value));
39                                    layerCounter++;
40                                }
41                            }
42                            
43                        }
44                    }
45                }
46            }
47            #endregion
48            #region "Create the legend dynamically"   ...
49
50
51            if (legendInfo != null && legendInfo.Count > 0)
52            {
53                int legendWidth = width;
54                int legendHeight = height;
55                int marginPadding = 10;
56                int legendEntryPadding = 5;
57
58                legendImage = new Bitmap(legendWidth, legendHeight);
59                legendImage.SetResolution(printResolution, printResolution);
60                Graphics graphics = Graphics.FromImage(legendImage);
61                Font stringFont = new Font("Verdana", 8, System.Drawing.FontStyle.Bold);
62                SolidBrush drawBrush = new SolidBrush(Color.Black);
63                List<Bitmap> legendEntries = new List<Bitmap>();
64
65                foreach (KeyValuePair<string, KeyValuePair<string, CartoImage>> item in legendInfo)
66                {
67                    if (item.Value.Value != null)
68                    {
69                        Bitmap swatch = new Bitmap(new System.IO.MemoryStream(item.Value.Value.MimeData.Bytes));
70                        float swatchColumnWidth = (swatch.Width * (printResolution / swatch.HorizontalResolution)) > 100 ? 100 : (swatch.Width * (printResolution / swatch.HorizontalResolution));
71                        SizeF textSize = graphics.MeasureString(item.Value.Key, stringFont, (int)(legendWidth - swatchColumnWidth - (marginPadding * 2)));
72                        float inidividualHeight = (swatch.Height * (printResolution / swatch.VerticalResolution)) > textSize.Height ? (swatch.Height * (printResolution / swatch.VerticalResolution)) : textSize.Height;
73
74                        Bitmap individuallegend = new Bitmap(legendWidth, (int)inidividualHeight);
75                        individuallegend.SetResolution(printResolution, printResolution);
76                        Graphics g = Graphics.FromImage(individuallegend);
77                        g.DrawImage(swatch, marginPadding, 0);
78                        RectangleF textArea = new RectangleF(swatchColumnWidth + marginPadding, 0, legendWidth - swatchColumnWidth - (marginPadding * 2), inidividualHeight);
79                        g.DrawString(item.Value.Key, stringFont, drawBrush, textArea);
80                        g.Dispose();
81                        //individuallegend.Save("C:\\arcgisserver\\arcgisoutput\\" + item.Key + ".bmp");
82                        legendEntries.Add(individuallegend);
83                    }
84                    else
85                    {
86                        SizeF textSize = graphics.MeasureString(item.Value.Key, stringFont, (int)(legendWidth - (marginPadding * 2)));
87                        float inidividualHeight = textSize.Height;
88
89                        Bitmap individuallegend = new Bitmap(legendWidth, (int)inidividualHeight);
90                        individuallegend.SetResolution(printResolution, printResolution);
91                        Graphics g = Graphics.FromImage(individuallegend);
92                        RectangleF textArea = new RectangleF(marginPadding, 0, legendWidth - (marginPadding * 2), inidividualHeight);
93                        g.DrawString(item.Value.Key, stringFont, drawBrush, textArea);
94                        g.Dispose();
95                        //individuallegend.Save("C:\\arcgisserver\\arcgisoutput\\" + item.Key + ".bmp");
96                        legendEntries.Add(individuallegend);
97                    }
98                }
99
100                Font legendTitleFont = new Font("Verdana", 10, System.Drawing.FontStyle.Bold);
101                SizeF legendTitleArea = graphics.MeasureString(legendTitle, legendTitleFont);
102
103                float currentY = 0;
104                //Add title to the legend
105                graphics.DrawString("Legend", legendTitleFont, drawBrush, marginPadding, legendEntryPadding);
106                currentY += legendTitleArea.Height + marginPadding;
107
108                //Add the individual legend entries
109                foreach (Bitmap entry in legendEntries)
110                {
111                    if ((currentY + entry.Height) < legendHeight)
112                    {
113                        graphics.DrawImage(entry, 0, currentY);
114                        currentY += entry.Height + legendEntryPadding;
115                    }
116                }
117
118                //legendImage.Save("C:\\arcgisserver\\arcgisoutput\\Legend.bmp");
119                graphics.Dispose();
120            }
121            #endregion
122
123
124            return legendImage;
125        }
126
127        private List<KeyValuePair<string, CartoImage>> GetLegendImages(TocLayer tocLayer)
128        {
129            List<KeyValuePair<string, CartoImage>> legends = new List<KeyValuePair<string, CartoImage>>();
130            if (tocLayer != null && tocLayer.Visible)
131            {
132                if (tocLayer.TocSymbolGroupCount > 0)
133                {
134                    if (tocLayer.TocSymbolGroupCount == 1)
135                    {
136                        TocSymbolGroup symbolGroupSingle = tocLayer.GetTocSymbolGroup(0);
137
138                        //Looks like there is no way to differentiate between a layer with a simple single symbol
139                        //and a layer with a group symbol with only one entry
140
141                        //So, if we encounter a group symbol with only one entry, assume it is a simple single legend
142                        //This actually does not make a difference for people reading the map as both should mean the same thing
143                        //The ESRI ADF TOC control works the same way
144                        if (symbolGroupSingle.Count == 1)
145                        {
146                            TocSymbol tocSymbol = symbolGroupSingle[0];
147                            legends.Add(new KeyValuePair<string, CartoImage>(tocLayer.LayerName, tocSymbol.Image));
148                        }
149                        else
150                        {
151                            System.Collections.IEnumerator e = tocLayer.GetTocSymbolGroups();
152                            //add the layer name
153                            if(e.MoveNext() && e.Current != null)
154                                legends.Add(new KeyValuePair<string, CartoImage>(tocLayer.LayerName, null));
155
156                            e.Reset();
157                            while (e.MoveNext())
158                            {
159                                //Add the group name
160                                TocSymbolGroup symbolGroup = e.Current as TocSymbolGroup;
161                                legends.Add(new KeyValuePair<string, CartoImage>(symbolGroup.Heading, null));
162
163                                foreach (TocSymbol tocSymbol in symbolGroup)
164                                {
165                                    //add group entries
166                                    legends.Add(new KeyValuePair<string, CartoImage>(tocSymbol.Label, tocSymbol.Image));
167                                }
168                            }
169                        }
170                    }
171                    else
172                    {
173                        System.Collections.IEnumerator e = tocLayer.GetTocSymbolGroups();
174                        if (e.MoveNext() && e.Current != null)
175                            legends.Add(new KeyValuePair<string, CartoImage>(tocLayer.LayerName, null));
176                        e.Reset();
177                        while (e.MoveNext())
178                        {
179                            TocSymbolGroup symbolGroup = e.Current as TocSymbolGroup;
180                            legends.Add(new KeyValuePair<string, CartoImage>(symbolGroup.Heading, null));
181
182                            foreach (TocSymbol tocSymbol in symbolGroup)
183                            {
184                                legends.Add(new KeyValuePair<string, CartoImage>(tocSymbol.Label, tocSymbol.Image));
185                            }
186                        }
187                    }
188                }
189
190                if (tocLayer.TocLayerCount > 0)
191                {
192                    System.Collections.IEnumerator subLayers = tocLayer.GetTocLayers();
193                    while (subLayers.MoveNext())
194                    {
195                        List<KeyValuePair<string, CartoImage>> subLayerLegends = GetLegendImages(subLayers.Current as TocLayer);
196                        if (subLayerLegends != null)
197                            legends.AddRange(subLayerLegends);
198                    }
199                }
200            }
201            return legends;
202        }