小白做课设，想问下下面的代码里的错误怎么改，总是说“应输入class、delegste、enum、interface或struct” private void 属性查询ToolStripMenuItem_Click(object sender, EventArgs e) { } } } private void axMapControl2_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e) if (this.axMapControl2.Map.LayerCount != 0) { // 按下鼠标左键移动矩形框 if (e.button == 1) { IPoint Point1 = new PointClass(); pPoint.PutCoords(e.mapX, e.mapY); IEnvelope pEnvelope = this.axMapControl1.Extent; pEnvelope.CenterAt(pPoint); this.axMapControl1.Extent = pEnvelope; this.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, null); // 按下鼠标右键绘制矩形框