为地图添加地图的基本要素(图例、比例尺、指北针)及相关注记,并将地图导出为图片。
(1)创建地图的基本要素主要用到IMapFrame接口中的CreateSurroundFrame方法;
(2)控制地图的基本要素主要用到IMapSurround接口;
(3)还有一个IMapSurroundFrame接口,这个是做什么的我也不知道怎么表达,代码中慢慢意会吧;
(4)通过一个标志变量来判断操作的类型,根据操作的类型来添加地图要素(文字、图例等)。
(1)主界面,主要由PageLayout控件、TOC控件、ToolBar控件组成,这里只通过ToolBar控件添加一些基本的缩放、平移等功能。
(2)添加标题,在文本框中输入地图名字,选择文字的颜色和字体后点击应用,在地图上拉框选择放置位置。
(3)添加图例界面,将需要添加至图例的图层由左侧添加至右侧,选择列数,点击应用后在地图中拉框选择放置位置。
地图图框点击事件,通过一个int类型的变量tag来判断要添加地图元素的类型。
(1)定义的全局变量:
#region 定义通用变量
int tag = 0;//记录操作的标签
IMapSurround pMapSurround = null;
UID pUid = null;
string pElementTypeName = "";//记录创建元素的名称,图例?比例尺?...
IMap pMap;
#endregion
#region 定义添加标题变量
public string title = "";
public ITextSymbol pTextSymbol = new TextSymbolClass();
#endregion
#region 定义添加图例变量
public List pLenendItemsString = new List();
ILegend2 pLegend2;
public int pColumnCount = 1;
//图例标题样式
ITextSymbol pTitltTextSymbol = new TextSymbolClass();
IFontDisp pTitltFont = new StdFont() as IFontDisp;
//图例图层名样式
ITextSymbol pLayerTextSymbol = new TextSymbolClass();
IFontDisp pLayerFont = new StdFont() as IFontDisp;
//图例标签样式
ITextSymbol pLabelTextSymbol = new TextSymbolClass();
IFontDisp pLabelFont = new StdFont() as IFontDisp;
ILegendFormat pLenendFormat = new LegendFormat();
#endregion
(2)点击地图图框事件
//点击地图框事件
private void axPageLayoutControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IPageLayoutControlEvents_OnMouseDownEvent e)
{
if (e.button == 1)
{
IPageLayout pPageLayout = axPageLayoutControl1.PageLayout; ;
IGraphicsContainer pGraphicsContainer = pPageLayout as IGraphicsContainer;
IActiveView pActiveView = pPageLayout as IActiveView;
IMapFrame pMapFrame;
IMapSurroundFrame pMapSurroundFrame;
IElement pElement;
switch (tag)
{
#region 添加标题
case 1:
ITextElement pTextElement = new TextElementClass();
pTextElement.Text = title;
pTextElement.Symbol = pTextSymbol;
pElement = pTextElement as IElement;
try
{
pElement.Geometry = axPageLayoutControl1.TrackRectangle();
}
catch
{
MessageBox.Show("请拉框选择范围!", "提示");
return;
}
pGraphicsContainer.AddElement(pElement, 0);
axPageLayoutControl1.Refresh();
tag = 0;
break;
#endregion
#region 添加图例
case 2:
pLegend2 = new LegendClass_2();
pElement = axPageLayoutControl1.FindElementByName("legend");
if (pElement != null)
{
pGraphicsContainer.DeleteElement(pElement);
}
pElementTypeName = "lenend";
pUid = new UIDClass();
pUid.Value = "esriCato.Legend";
if (pGraphicsContainer == null) return;
pMapSurround = pLegend2 as IMapSurround;
pMapSurround.Map = pActiveView.FocusMap;
pMapFrame = pGraphicsContainer.FindFrame(pActiveView.FocusMap) as IMapFrame;
if (pMapFrame == null) return;
pMapSurroundFrame = new MapSurroundFrameClass();
pMapSurroundFrame = pMapFrame.CreateSurroundFrame(pUid, null);
pMapSurroundFrame.MapSurround = pMapSurround;
pMapSurroundFrame.MapSurround.Name = pElementTypeName;
pMapSurroundFrame.MapFrame = pMapFrame;
pElement = pMapSurroundFrame as IElement;
try
{
pElement.Geometry = axPageLayoutControl1.TrackRectangle();
}
catch
{
MessageBox.Show("请拉框选择范围!", "提示");
return;
}
pElement.Activate(pActiveView.ScreenDisplay);
pElement.Draw(pActiveView.ScreenDisplay, null);
pGraphicsContainer.AddElement(pElement, 0);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null);
//图例标题字体样式
pLegend2.Title = "图例";
pTitltFont.Name = "黑体";
pTitltFont.Bold = true;
pTitltFont.Size = 16;
pTitltTextSymbol.Color = ColorToIColor(Color.Black);
pTitltTextSymbol.Font = pTitltFont;
pLenendFormat.TitleSymbol = pTitltTextSymbol;
//图例图层名字体样式
pLayerFont.Name = "仿宋_GB2312";
pLayerFont.Size = 13;
pLayerTextSymbol.Font = pLayerFont;
//图例标签字体样式
pLabelFont.Name = "仿宋_GB2312";
pLabelFont.Size = 13;
pLabelTextSymbol.Font = pLayerFont;
for (int i = 0; i < pLenendItemsString.Count; i++)
{
for (int j = 0; j < pLegend2.ItemCount; j++)
{
if (pLenendItemsString[i].ToString() == pLegend2.get_Item(j).Layer.Name)
pLegend2.RemoveItem(j);
}
}
pLegend2.AdjustColumns(pColumnCount);
pLegend2.Refresh();
tag = 0;
break;
#endregion
}
}
}
github: ArcEngine实现专题图制作