/// <summary>
/// 显示指定图层指定字段的标注
/// </summary>
/// <param name="geoLayer">要设置注标注的图层(IFeatureLayer as IGeoFeatureLayer)</param>
/// <param name="fieldName">显示标注的字段</param>
/// <param name="fontName">标注的字体</param>
/// <param name="size">标注的大小</param>
public static void ShowLabel(this IGeoFeatureLayer geoLayer, string fieldName, string fontName = "宋体", int size = 12)
{
//标注属性集
IAnnotateLayerPropertiesCollection annotateLyrProColl = geoLayer.AnnotationProperties;
annotateLyrProColl.Clear();
//普通标准属性（另一个是Maplex标准属性）
ILabelEngineLayerProperties labelEngine = new LabelEngineLayerPropertiesClass();
labelEngine.Expression = $"[{fieldName}]";
//字体
IFontDisp fontDisp = new StdFont()
{
Name = fontName, Bold = false
} as IFontDisp;
//标注符号
ITextSymbol textSymbol = new TextSymbolClass();
textSymbol.Color = ColorCreate.GetIColor(0, 0, 0);
textSymbol.Font = fontDisp;
textSymbol.Size = size;
labelEngine.Symbol = textSymbol;
//设置同名标注：默认为移除同名标注，应设为每个要素放置一个标注
IBasicOverposterLayerProperties basicOverpLyrPro = labelEngine.BasicOverposterLayerProperties as IBasicOverposterLayerProperties;
basicOverpLyrPro.NumLabelsOption = esriBasicNumLabelsOption.esriOneLabelPerShape;//每个要素放置一个标注
annotateLyrProColl.Add(labelEngine as IAnnotateLayerProperties);
geoLayer.DisplayAnnotation = true;
}
public void SetObjects(object @object)
{
ILabelStyle style = @object as ILabelStyle;
if (style != null)
{
this.m_pTextSymbol = (style.Symbol as IClone).Clone() as ITextSymbol;
this.m_pOverposterLayerProperties =
(style.BasicOverposterLayerProperties as IClone).Clone() as IBasicOverposterLayerProperties;
}
}
private void CreateLabels()
{
if (Layer is IGeoFeatureLayer geoFeatureLayer)
{
const double TextSizePt = 9.0;
const double GoodLookingScale = 500.0;
double referenceScale = ArcmapUtils.GetReferenceScale(GoodLookingScale);
string tableName = ArcobjWorkspaceUtils.UnqualifyTableName(ArcobjWorkspaceUtils.GetTableName(geoFeatureLayer.FeatureClass as IDataset));
string oidFieldName = geoFeatureLayer.FeatureClass.OIDFieldName;
string globalIdFieldName = ArcobjWorkspaceUtils.GetGlobalIdFieldName(geoFeatureLayer.FeatureClass as ITable);
string expression = FormatLabelExpression(tableName, oidFieldName, globalIdFieldName);
ITextSymbol textSymbol = new TextSymbolClass();
textSymbol.Color = ArcmapLayerUtils.DetectLayerMainColor(geoFeatureLayer);
textSymbol.Size = TextSizePt / referenceScale * GoodLookingScale;
// Remove existing annotations
geoFeatureLayer.DisplayAnnotation = false;
geoFeatureLayer.AnnotationProperties.Clear();
IAnnotateLayerProperties annotateLayerProperties = new LabelEngineLayerPropertiesClass();
annotateLayerProperties.UseOutput = true;
annotateLayerProperties.LabelWhichFeatures = esriLabelWhichFeatures.esriVisibleFeatures;
annotateLayerProperties.CreateUnplacedElements = true;
ILabelEngineLayerProperties2 labelEngineProperties = (ILabelEngineLayerProperties2)annotateLayerProperties;
labelEngineProperties.ExpressionParser = new AnnotationVBScriptEngineClass();
labelEngineProperties.Expression = expression;
labelEngineProperties.Symbol = textSymbol;
IBasicOverposterLayerProperties overposterProperties = labelEngineProperties.BasicOverposterLayerProperties;
overposterProperties.GenerateUnplacedLabels = true;
overposterProperties.NumLabelsOption = esriBasicNumLabelsOption.esriOneLabelPerShape;
overposterProperties.PointPlacementOnTop = true;
overposterProperties.PointPlacementMethod = esriOverposterPointPlacementMethod.esriSpecifiedAngles;
overposterProperties.PointPlacementAngles = new[] { 30.0 };
overposterProperties.LineLabelPosition = CreateLineLabelPosition();
if (labelEngineProperties.OverposterLayerProperties is IOverposterLayerProperties2 overposterProperties2)
{
overposterProperties2.TagUnplaced = false; // The "place overlapping labels" option
}
// Show new annotation in map
geoFeatureLayer.AnnotationProperties.Add(annotateLayerProperties);
geoFeatureLayer.DisplayAnnotation = true;
ArcmapUtils.InvalidateMap(ArcmapUtils.GetFocusMap());
}
}
private void getLayerLabel_Maplex(IGeoFeatureLayer pGeoFeatLayer)
{
Boolean bIsLabel = pGeoFeatLayer.DisplayAnnotation;
if (bIsLabel)
{
this.chkIsLabel.Checked = true;
}
else
{
this.chkIsLabel.Checked = false;//changed by chulili 20110712修改bug true->false
}
//added by chulili 20110804按照图层的标注设置初始化界面
//this.chkIsLabel.Checked = pGeoFeatureLayer.DisplayAnnotation;
IAnnotateLayerPropertiesCollection pAnnotateLayerPropertiesCollection = pGeoFeatLayer.AnnotationProperties;
if (pAnnotateLayerPropertiesCollection == null)
{
return;
}
//定义IAnnotateLayerPropertiesCollection.QueryItem方法中调用的对象
IAnnotateLayerProperties pAnnoLayerProperties = null;
IElementCollection pElementCollection = null;
IElementCollection pElementCollection1 = null;
//获取标注渲染对象
pAnnotateLayerPropertiesCollection.QueryItem(0, out pAnnoLayerProperties, out pElementCollection, out pElementCollection1);
if (pAnnoLayerProperties == null)
{
return;
}
ILabelEngineLayerProperties2 pLabelEngineLayerPro = pAnnoLayerProperties as ILabelEngineLayerProperties2;
if (pLabelEngineLayerPro == null)
{
return;
}
ITextSymbol pTextSymbol = pLabelEngineLayerPro.Symbol;
IMaplexOverposterLayerProperties pmaplexoverposterlayerprop = pLabelEngineLayerPro.OverposterLayerProperties as IMaplexOverposterLayerProperties;
IBasicOverposterLayerProperties pBasicOverposterLayerProp = pLabelEngineLayerPro.OverposterLayerProperties as IBasicOverposterLayerProperties;
if (pBasicOverposterLayerProp != null)
{
switch (pBasicOverposterLayerProp.NumLabelsOption)
{
case esriBasicNumLabelsOption.esriOneLabelPerName:
this.rdbPerName.Checked = true;
break;
case esriBasicNumLabelsOption.esriOneLabelPerPart:
this.rdbPerPart.Checked = true;
break;
case esriBasicNumLabelsOption.esriOneLabelPerShape:
this.rdbPerShape.Checked = true;
break;
default:
this.rdbPerName.Checked = true;
break;
}
}
/////////////////////////////
string strMaxScale = pAnnoLayerProperties.AnnotationMaximumScale.ToString();
string strMinScale = pAnnoLayerProperties.AnnotationMinimumScale.ToString();
////////////////////////////
this.txtMaxLabelScale.Text = strMaxScale;
this.txtMinLabelScale.Text = strMinScale;
this.btnBold.Checked = pTextSymbol.Font.Bold;
this.btnItalic.Checked = pTextSymbol.Font.Italic;
this.btnUnderLine.Checked = pTextSymbol.Font.Underline;
this.FontColorPicker.SelectedColor = ColorTranslator.FromOle(pTextSymbol.Color.RGB);
newSize = (float)Convert.ToDouble(pTextSymbol.Font.Size);
newFamily = new FontFamily(pTextSymbol.Font.Name);
newFont = FontStyle.Regular;//CmbFields
string strField = pLabelEngineLayerPro.Expression;
//获取字段名称
if (strField.StartsWith("["))
{
strField = strField.Substring(1);
}
if (strField.EndsWith("]"))
{
strField = strField.Substring(0, strField.Length - 1);
}
//设置界面上字段名称
for (int i = 0; i < CmbFields.Items.Count; i++)
{
if (CmbFields.Items[i].ToString() == strField)
{
CmbFields.SelectedIndex = i;
break;
}
}
//设置界面上字体名称
for (int i = 0; i < CmbFontName.Items.Count; i++)
{
if (CmbFontName.Items[i].ToString() == pTextSymbol.Font.Name)
{
CmbFontName.SelectedIndex = i;
break;
}
}
//设置界面上字体大小
decimal dSize = decimal.Round(pTextSymbol.Font.Size, 0, MidpointRounding.AwayFromZero);
string strLabelSize = Convert.ToInt32(dSize).ToString();
for (int i = 0; i < CmbFontSize.Items.Count; i++)
{
if (CmbFontSize.Items[i].ToString() == strLabelSize)
{
CmbFontSize.SelectedIndex = i;
break;
}
}
if (pTextSymbol.Font.Underline)
{
newFont = newFont ^ FontStyle.Underline;
}
if (pTextSymbol.Font.Bold)
{
newFont = newFont ^ FontStyle.Bold;
}
if (pTextSymbol.Font.Italic)
{
newFont = newFont ^ FontStyle.Italic;
}
//设置界面上字体格式
setFont();
//设置界面上字体颜色
LabelText.ForeColor = ColorTranslator.FromOle(pTextSymbol.Color.RGB);
}
public void SetObjects(object @object)
{
this.m_pOverposterLayerProperties = @object as IBasicOverposterLayerProperties;
}
