/// <summary>
/// trackBarValueChanged事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void VersionTimeSld_ValueChanged(object sender, EventArgs e)
{
try
{
DateTime key = this._graphElements.EntityElements.Keys.ElementAt(this.VersionTimeSld.Value);
List <ClsGraphElement> graphElements = this._graphElements.EntityElements[key];
this._mapControl.Map.ClearSelection();//清除地图的选择
IEnvelope env = new EnvelopeClass();
for (int i = 0; i < graphElements.Count; i++)
{
ClsGraphElement ge = graphElements[i];
this._mapControl.Map.SelectFeature(this.GetFeatureLayerByName(this._pFeatlayerList, ge.LayerName), ge.Feature);//将查询到的地物作为选择对象高亮显示在地图上
env.Union(ge.Feature.Shape.Envelope);
}
//env.Expand(2, 2, true);
//this._mapControl.Extent = env;
IPoint pt = new PointClass();
pt.X = (env.UpperLeft.X + env.LowerRight.X) / 2;
pt.Y = (env.UpperLeft.Y + env.LowerRight.Y) / 2;
this._mapControl.CenterAt(pt);
this._mapControl.ActiveView.Refresh();//刷新地图，这样才能显示出地物
//显示查询的信息
this.ShowEntityData(this.EntityCode.Text);
}
catch (System.Exception ex)
{
//MessageBox.Show(ex.Message);
MessageBox.Show("请先点击确定！");
}
}
/// <summary>
///
/// </summary>
/// <param name="entityID">实体编码</param>
/// <param name="pFeatlayerList">MapControl中的图层集</param>
/// <param name="lyrName">图层名称</param>
private void GetGraphElementsInLyr(string entityID, List <IFeatureLayer> pFeatlayerList, string lyrName)
{
string entityField = ClsConfig.LayerConfigs[lyrName].EntityID;
IFeatureLayer featLyr = this.GetFeatureLayerByName(pFeatlayerList, lyrName);
IFeatureCursor pCursor = null;
IFeature pFeature = null;
//查询一个字段（ENTIID）
IQueryFilter queryFilter = new QueryFilterClass();
queryFilter.WhereClause = entityField + " = '" + entityID + "'";
pCursor = featLyr.FeatureClass.Search(queryFilter, false);
if (pCursor != null)
{
pFeature = pCursor.NextFeature();
}
while (pFeature != null)
{
ClsGraphElement ge = this.GetGraphElement(pFeature, lyrName);
this._graphElements.Add(ge);
pFeature = pCursor.NextFeature();
}
}
/// <summary>
/// 获取图层元素
/// </summary>
/// <param name="pFeature">要素</param>
/// <param name="lyrName">图层名</param>
/// <returns></returns>
private ClsGraphElement GetGraphElement(IFeature pFeature, string lyrName)
{
string fromField = ClsConfig.LayerConfigs[lyrName].StartVersion;
string endField = ClsConfig.LayerConfigs[lyrName].EndVersion;
string sourceName = ClsConfig.LayerConfigs[lyrName].SourceName;
string sourceType = ClsConfig.LayerConfigs[lyrName].SourceType;
//声明一个类ClsGraphElement的实例ge
ClsGraphElement ge = new ClsGraphElement();
string fromVersion = pFeature.get_Value(pFeature.Fields.FindField(fromField)).ToString();
DateTime collectTime = this.GetDateTime(fromVersion, sourceName, this._versionTable);
string endVersion = pFeature.get_Value(pFeature.Fields.FindField(endField)).ToString();
DateTime endTime = this.GetDateTime(endVersion, sourceName, this._versionTable);
//对类的各个字段进行赋值
ge.VersionTime = collectTime;
ge.EndVersionTime = endTime;
ge.Feature = pFeature;
ge.Source = sourceType;
ge.LayerName = lyrName;
ge.Version = fromVersion;
//返回类
return(ge);
}
