MapXtreme 四项基本功(增删改查)
/// <summary>
/// 向图层中添加点
/// <param name="tempLayerTableName">表名</param>
/// <param name="tempLayerName">图层名</param>
/// <param name="dPoint">点坐标</param>
public void AddPointToLayer(string tempLayerTableName, string tempLayerName, List<string> list)
{
DPoint dPoint = new DPoint(double.Parse(list[list.Count - 2]), double.Parse(list[list.Count - 1]));
MapInfo.Mapping.Map myMap = MapInfo.Engine.Session.Current.MapFactory[mapControl1.Map.Alias];
//获取图层和表
FeatureLayer workLayer = (MapInfo.Mapping.FeatureLayer)myMap.Layers[tempLayerName];
MapInfo.Data.Table tblTemp = MapInfo.Engine.Session.Current.Catalog.GetTable(tempLayerTableName);
//创建点图元及其样式
FeatureGeometry pgPoint = new MapInfo.Geometry.Point(workLayer.CoordSys, dPoint);
MapInfo.Styles.SimpleVectorPointStyle spsPoint = new MapInfo.Styles.SimpleVectorPointStyle(37, System.Drawing.Color.Blue, 40);
MapInfo.Styles.CompositeStyle csPoint = new MapInfo.Styles.CompositeStyle(spsPoint);
MapInfo.Data.Feature feature = new MapInfo.Data.Feature(tblTemp.TableInfo.Columns);
feature.Geometry = pgPoint;
feature.Style = csPoint;
feature[feature.Columns[6].Alias] = "xxx";//图元属性赋值
feature[feature.Columns[7].Alias] = "YYYY";//图元属性赋值
workLayer.Table.InsertFeature(feature);
}
//*******************************************************
//删除图元Key key = new Key();
key.Value = featureKey;//featureKey为图元键值
mapTable.DeleteFeature(key);//mapTable表
//*******************************************************
/// <summary>
/// 通过Search方法查找图元
/// <param name="tableName">查找的表名</param>
/// <param name="sbuilder">查找条件</param>
public void SearchWithSearch(Table table, StringBuilder sbuilder)
{
#region
MapInfo.Mapping.Map map = mapControl1.Map;
IResultSetFeatureCollection ifs = null;
SearchInfo si = MapInfo.Data.SearchInfoFactory.SearchWhere(sbuilder.ToString());
try
{
ifs = Session.Current.Catalog.Search(table, si);
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Clear();
if (ifs.Count > 0)
{
//高亮显示
MapInfo.Engine.Session.Current.Selections.DefaultSelection.Add(ifs);
if (ifs.Count == 1)
{
map.Center = new DPoint(ifs[0].Geometry.Centroid.x, ifs[0].Geometry.Centroid.y);
map.Zoom = new MapInfo.Geometry.Distance(0.5, map.Zoom.Unit);
}
//设置高亮显示的样式
((SimpleInterior)MapInfo.Engine.Session.Current.Selections.DefaultSelection.Style.AreaStyle.Interior).BackColor
= System.Drawing.Color.Red;
}
}
catch (Exception ex)
{
string eee = ex.Message;
}
finally
{
if (ifs != null)
{
ifs.Close();
}
}
#endregion
}
使用方法：
StringBuilder searchWhere = new StringBuilder();
string keyStr = this.dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString();
searchWhere.Append("MI_Key");
searchWhere.Append("='");
searchWhere.Append(keyStr);
searchWhere.Append("'");
SearchWithSearch(mapTable, searchWhere);
//*******************************************************
/// <summary>
/// 修改图元
/// </summary>
private void updatefea()
{
DPoint featureCoord = new DPoint();
featureCoord = feature.Geometry.Centroid;
double x=0.0;
double y=0.0;
for (int i = 0; i < panel1.Controls.Count; i++)
{
Control control = panel1.Controls[i];
if (control is TextBox)
{
TextBox txtbox = (TextBox)control;
if (txtbox.Enabled)
{
for (int j = 0; j < feature.Columns.Count; j++)
{
if ("txt" + feature.Columns[j].Alias == txtbox.Name)
{
//修改图元属性值
feature[feature.Columns[j].Alias] = txtbox.Text;
}
}
if (txtbox.Name == "txtLON1")
{
//修改图元属性值
x= double.Parse(txtbox.Text);
}
if (txtbox.Name == "txtLAT1")
{
//修改图元属性值
y = double.Parse(txtbox.Text);
}
}
}
}
//更改坐标
feature.Geometry.GetGeometryEditor().OffsetByXY((x -
featureCoord.x), (y - featureCoord.y), DistanceUnit.Degree,
DistanceType.Spherical);
feature.Geometry.EditingComplete();
DialogResult ret = MessageBox.Show("确定要修改记录么？", "修改图元提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question);
if (ret == DialogResult.OK)
{
feature.Update();
}
}
//********************************
