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RLAlterFrm RLalter = new RLAlterFrm();RLalter.ShowDialog();string AlterID = RLalter.textBox1.Text;string AlterRP = RLalter.textBox2.Text;string AlterC = RLalter.textBox3.Text;axMapControl1.ClearLayers();axMapControl1.Refresh();try{    string strFileName = Application.StartupPath + @"\数据\Roadlamp.mxd";    //在数据视图中加载地图，供查询操作    if (axMapControl1.CheckMxFile(strFileName))    {        axMapControl1.LoadMxFile(strFileName);    }    else    {        MessageBox.Show("错误的数据路径：" + strFileName);    }}catch (Exception ex){    MessageBox.Show("Error01 in MainForm.cs" + ex.Message);}axMapControl1.Refresh();string strQK = RLalter.getQueryKey();//获取查询值//找到图层IFeatureLayer pfeaturelayer = new FeatureLayer();pfeaturelayer = axMapControl1.get_Layer(0) as IFeatureLayer;//找到要素IQueryFilter pQueryFilter = new QueryFilter();pQueryFilter.WhereClause = "[RL_ID] = '" + strQK + "'";IFeatureCursor pFeatureCur = pfeaturelayer.Search(pQueryFilter, false);IFeature pFeature = null;pFeature = pFeatureCur.NextFeature();if (null == pFeature){    MessageBox.Show("对不起！该元素不存在");}else{    IFields pFields = pFeature.Fields;IFeatureClass pFeatureClass = pfeaturelayer.FeatureClass;    //修改属性值     int field1 = pFields.FindField("RL_ID");    int field2 = pFields.FindField("RL_RP");    int field3 = pFields.FindField("RL_C");    pFeature.set_Value(field1, AlterID);    pFeature.set_Value(field2, AlterRP);    pFeature.set_Value(field3, AlterC);    pFeature.Store();    MessageBox.Show("修改成功！","提示");}}