private void buttonOk_Click(object sender, EventArgs e)
{
this.WindowState = FormWindowState.Minimized;//通过位置查询窗口最小化
frmPromptQuerying frmPrompt = new frmPromptQuerying();
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents();//'转让控制权，没有这一句的话提示窗口不能正常显示
PerformAttributeSelect();
frmPrompt.Dispose();
this.Dispose();
pMainform.frmAttriQueryisOpen = false;//当窗口关闭时，此变量为false告知系统当前没有打开的属性查询窗口
}
private void PerformLocationQuery(ISpatialFilter pSpatialFilter)
{
try
{
frmPromptQuerying frmPrompt = new frmPromptQuerying(); //提示：空间查询中
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents(); //'转让控制权，没有这一句的话提示窗口不能正常显示
string strLayerName;
IFeatureLayer pFeatureLayer;
IFeatureSelection pFeatureSelection; //用来记录查询的结果
foreach (object itemChecked in checkedListBoxFeaturesLayer1.CheckedItems) //对于每一个选中的层都执行查询，结果合并
{
strLayerName = itemChecked.ToString(); //这个才是待查询的layer
pFeatureLayer = GetLayerbyName(strLayerName) as IFeatureLayer;
pFeatureSelection = pFeatureLayer as IFeatureSelection;
pFeatureSelection.SelectFeatures(pSpatialFilter, esriSelectionResultEnum.esriSelectionResultAdd, false);//待选的层可能不止一个
//通过循环依次查询每个层，把结果add起来
}
//如果复选框被选中，则定位到选择结果
if (checkBoxZoomtoSelected.Checked == true)
{
IEnumFeature pEnumFeature = MainAxMapControl.Map.FeatureSelection as IEnumFeature;
IFeature pFeature = pEnumFeature.Next();
ESRI.ArcGIS.Geometry.IEnvelope pEnvelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
while (pFeature != null)
{
pEnvelope.Union(pFeature.Extent);
pFeature = pEnumFeature.Next();
}
MainAxMapControl.ActiveView.Extent = pEnvelope;
MainAxMapControl.ActiveView.Refresh();//如果不这样刷新，只要查询前地图已经被放大所效果的话，定位后
//底图没有刷新，选择集倒是定位和刷新了
}
frmPrompt.Dispose();
//把结果显示出来
MainAxMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
//double i = MainAxMapControl.Map.SelectionCount;
//i = Math.Round(i, 0);//小数点后指定为０位数字
//pMainform.toolStripStatusLabel1.Text = "当前共有" + i.ToString() + "个查询结果";
}
catch (Exception ex)
{
MessageBox.Show("生成查询结果出错!请检查 | " + ex.Message);
return;
}
}
private void buttonApply_Click(object sender, EventArgs e)
{
if (textBoxWhereClause.Text == "")
{
MessageBox.Show("请生成查询语句！");
return;
}
this.WindowState = FormWindowState.Minimized;//通过位置查询窗口最小化
frmPromptQuerying frmPrompt = new frmPromptQuerying();
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents();//'转让控制权，没有这一句的话提示窗口不能正常显示
PerformAttributeSelect();
frmPrompt.Dispose();
this.WindowState = FormWindowState.Normal;
}
private void PerformLocationQuery(ISpatialFilter pSpatialFilter)
{
try
{
frmPromptQuerying frmPrompt = new frmPromptQuerying();//��ʾ���ռ��ѯ��
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents();//'ת�ÿ���Ȩ��û����һ��Ļ���ʾ���ڲ���������ʾ
string strLayerName;
IFeatureLayer pFeatureLayer;
IFeatureSelection pFeatureSelection;//������¼��ѯ�Ľ��
foreach (object itemChecked in checkedListBoxFeaturesLayer1.CheckedItems) //����ÿһ��ѡ�еIJ㶼ִ�в�ѯ������ϲ�
{
strLayerName = itemChecked.ToString(); //������Ǵ���ѯ��layer
pFeatureLayer = GetLayerbyName(strLayerName) as IFeatureLayer;
pFeatureSelection = pFeatureLayer as IFeatureSelection;
pFeatureSelection.SelectFeatures(pSpatialFilter, esriSelectionResultEnum.esriSelectionResultAdd, false);//��ѡ�IJ���ܲ�ֹһ��
//ͨ��ѭ�����β�ѯÿ���㣬�ѽ��add����
}
//�����ѡ��ѡ�У���λ��ѡ����
if (checkBoxZoomtoSelected.Checked == true)
{
IEnumFeature pEnumFeature = MainAxMapControl.Map.FeatureSelection as IEnumFeature;
IFeature pFeature = pEnumFeature.Next();
ESRI.ArcGIS.Geometry.IEnvelope pEnvelope = new ESRI.ArcGIS.Geometry.EnvelopeClass();
while (pFeature != null)
{
pEnvelope.Union(pFeature.Extent);
pFeature = pEnumFeature.Next();
}
MainAxMapControl.ActiveView.Extent = pEnvelope;
MainAxMapControl.ActiveView.Refresh();//���������ˢ�£�ֻҪ��ѯǰ��ͼ�Ѿ����Ŵ���Ч���Ļ�����λ��
//��ͼû��ˢ�£�ѡ���Ƕ�λ��ˢ����
}
frmPrompt.Dispose();
//�ѽ����ʾ����
MainAxMapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
//double i = MainAxMapControl.Map.SelectionCount;
//i = Math.Round(i, 0);//С�����ָ��Ϊ��λ����
//pMainform.toolStripStatusLabel1.Text = "��ǰ����" + i.ToString() + "����ѯ���";
}
catch (Exception ex)
{
MessageBox.Show("���ɲ�ѯ�������!���� | "+ex.Message);
return;
}
}
private ISpatialFilter GenerateSpatialFilter()
{
frmPromptQuerying frmPrompt = new frmPromptQuerying(4);//��ʾ����������ͼ���� Ϊ�����쳣ʱ�ܽ�����ʾ���ڹرգ����Է���try����
try
{
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents();//'ת�ÿ���Ȩ��û����һ��Ļ���ʾ���ڲ���������ʾ
//����Ҫ�����spatialfilter
//��ù���spatialfilter.geometry������feature
//IMap pMap; //����QI��IEnumLayer
//IEnumLayer pEnumLayer; //����������Ϊ��ѡ���layers
//ILayer pLayer;
IFeatureLayer pFeatureLayer = null;
IGeometry pGeometry = null;
IEnumFeature pEnumFeature = null; //�����зֱ�����ʹ�úͲ�ʹ��
IFeatureCursor pFeatureCursor = null; //�Ѿ�ѡ���Ԫ�����ɡ�ɸѡͼ�Ρ������
IFeatureClass pFeatureClass;
IFeature pFeature;
string strLayerName = comboBoxConditionLayer.Text;
if (checkBoxUseSelectedOnly.Checked == false) //����û��Լ�ѡ������ͼ�㡱,��������ѡ�е�Ԫ��
{
pFeatureLayer = GetLayerbyName(strLayerName) as IFeatureLayer; //���layer����������spatialfilter.geometry��
//���Ǹ�������ͼ�㡱
//���ﲻ��featureselection�����enumfeature,�Ӷ����������geometry�ϲ�������ȡfeaturecursor������Ϊ
//��featureselection�Ļ�����ô��ϲ�������feature��һ�������ôд��featureselection=mainaxmapcontrol.map.featureselection
//������ָ��featureselection��map�����һ���㣡���������featureselection=pfeaturelayer.featureselection��
//Ȼ��enumfeature=featureselection����ʱenumfeature����null�����е�pfeaturelayer�Ѿ���map���һ��ָ���IJ��ˣ�
//�����featureselection=mainaxmapcontrol.map.featureselection���ͻ������⣺Ҳ��map�����Ѿ��б�ѡ�е�Ԫ���ˣ�����ʱ�����ַ���
//��õ�enumfeatureֻ������Щ�Ѿ�ѡ�е�Ԫ�أ�����Ӧ����������Ӧ�û�õ���ָ��Ϊ������ͼ�㡱������feature������ֻ����featurecursor
//�����featureselection�Ļ���Ҫ��ôд��
//IFeatureSelection pFeatureSelection = MainaxMapControl.get_Layer(strLayerName) as IFeatureSelection;
//pFeatureSelection.SelectFeatures(null, esriSelectionResultEnum.esriSelectionResultNew, false);//��ʹ���ѱ�ѡ�е�Ԫ��ʱ������仰Խ��ȥ
//IEnumFeature pEnumFeature = MainaxMapControl.Map.FeatureSelection as IEnumFeature;
pFeatureClass = pFeatureLayer.FeatureClass;
pFeatureCursor = pFeatureClass.Search(null, true);
pFeature = pFeatureCursor.NextFeature();
}
else //���ʹ�õ�ͼ����ѡ�е�Ԫ����Ϊ��ɸѡͼ�㡱
{
pEnumFeature = MainAxMapControl.Map.FeatureSelection as IEnumFeature;
pFeature = pEnumFeature.Next();
}
pGeometry = pFeature.Shape;
ITopologicalOperator pTopologicalOperator;
//�ϲ������Ե���ɸ�ӡ���geometry
while (pFeature != null)
{
//�����һ���ǹؼ����������յ�pgeometry���Ի���������geometry
//��ΪTopologicalOperator�������һ��shape��һ��geometry�����Խ����������������ĺϲ�.
//ֻ����shapecopy���ܹ���ȷ����shape�Ļ����ļ��ͳ����Ϊ��������ⵢ����һ���ڣ�����
//����һ��˼·Ҳ���ԡ������˼·����ѭ���ϲ�����geometry����һ��˼·����ѭ���õ�����ÿ��
//geometryȥɸѡͼ�����featuresȻ��ϲ����
pTopologicalOperator = pFeature.ShapeCopy as ITopologicalOperator;
//if (checkBoxBuffer.Checked == true)
//{
// double ddistance = Convert.ToDouble(textBoxBuffer.Text);
// pGeometry = pTopologicalOperator.Buffer(ddistance);
// //pTopologicalOperator.Simplify(); //ʹ���˹�ϵ�����ȷ
//}
pGeometry = pTopologicalOperator.Union(pGeometry as IGeometry);
if (checkBoxUseSelectedOnly.Checked == false)//�õ���featurecursor
pFeature = pFeatureCursor.NextFeature();
else pFeature = pEnumFeature.Next();
}
//pFeatureSelection.Clear();//������������������geometry��������featureselection�Ļ�����Ҳ��һ��ؼ���
//�������յ���ʾҲ�������featureselection��ʾ����
//���ɻ����������������ѭ��֮��ִ�У������Ӹ���Ч�ʣ����Ҹ������׳���
if (checkBoxBuffer.Checked == true)
{
double ddistance = Convert.ToDouble(textBoxBuffer.Text);
pTopologicalOperator = pGeometry as ITopologicalOperator;
pGeometry = pTopologicalOperator.Buffer(ddistance);
pTopologicalOperator.Simplify(); //ʹ���˹�ϵ�����ȷ
//MainAxMapControl.FlashShape(pGeometry, 2, 500, null);//��˸����֤��������ȷ���
}
frmPrompt.WindowState = FormWindowState.Minimized;
frmPrompt.Dispose();
System.Windows.Forms.Application.DoEvents();
object m_fillsymbol; //�����drawshape�IJ���������object��
IRgbColor pRgb = new RgbColorClass(); // ��ȡIRGBColor�ӿ�
pRgb.Red = 255; // ������ɫ����
ILineSymbol outline = new SimpleLineSymbolClass(); // ��ȡILine���Žӿ�
outline.Width = 5;
outline.Color = pRgb;
ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();// ��ȡIFillSymbol�ӿ�
simpleFillSymbol.Outline = outline;
simpleFillSymbol.Color = pRgb;
simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSBackwardDiagonal;
m_fillsymbol = simpleFillSymbol;
//MainAxMapControl.DrawShape(pGeometry, ref m_fillsymbol);
MainAxMapControl.FlashShape(pGeometry, 3, 500, m_fillsymbol);//��˸�����û�֪����ǰ��"����ͼ��"����״
ISpatialFilter pSpatialFilter = new SpatialFilterClass();
pSpatialFilter.Geometry = pGeometry;
pSpatialFilter.SpatialRel = pSpatialRel; //���Ǹ�ȫ�ֱ���
if (checkBoxUseSelectedOnly.Checked == true)
pSpatialFilter.GeometryField = "Shape"; //��ʹ����ѡ�е�Ԫ����Ϊ��ɸѡͼ�㡱ʱ��
//�����������ȥ���geometryfield����Ϊpfeaturelayer(����ͼ��)Ϊ��
else
pSpatialFilter.GeometryField = pFeatureLayer.FeatureClass.ShapeFieldName;
return pSpatialFilter;
}
catch (Exception ex)
{
MessageBox.Show("���ɡ�����ͼ�㡱����!���� | " + ex.Message);
frmPrompt.Dispose();
return null;//��������spatialfitler
}
}
private ISpatialFilter GenerateSpatialFilter()
{
frmPromptQuerying frmPrompt = new frmPromptQuerying(4);//提示：构造条件图层中 为了在异常时能将此提示窗口关闭，所以放在try外面
try
{
frmPrompt.Show();
System.Windows.Forms.Application.DoEvents();//'转让控制权，没有这一句的话提示窗口不能正常显示
//首先要构造出spatialfilter
//获得构造spatialfilter.geometry的所有feature
//IMap pMap; //用来QI到IEnumLayer
//IEnumLayer pEnumLayer; //接收所有作为代选层的layers
//ILayer pLayer;
IFeatureLayer pFeatureLayer = null;
IGeometry pGeometry = null;
IEnumFeature pEnumFeature = null; //这两行分别用于使用和不使用
IFeatureCursor pFeatureCursor = null; //已经选择的元素生成“筛选图形”的情况
IFeatureClass pFeatureClass;
IFeature pFeature;
string strLayerName = comboBoxConditionLayer.Text;
if (checkBoxUseSelectedOnly.Checked == false) //如果用户自己选择“条件图层”,而不用已选中的元素
{
pFeatureLayer = GetLayerbyName(strLayerName) as IFeatureLayer; //这个layer是用来构造spatialfilter.geometry的
//是那个“条件图层”
//这里不用featureselection来获得enumfeature,从而进行下面的geometry合并，而采取featurecursor，是因为
//用featureselection的话，获得待合并的所有feature的一句必须这么写：featureselection=mainaxmapcontrol.map.featureselection
//而不能指定featureselection到map具体的一个层！（比如如果featureselection=pfeaturelayer.featureselection，
//然后enumfeature=featureselection，这时enumfeature就是null！其中的pfeaturelayer已经是map里的一个指定的层了）
//如果用featureselection=mainaxmapcontrol.map.featureselection，就会有问题：也许map上面已经有被选中的元素了，而此时用这种方法
//获得的enumfeature只能是这些已经选中的元素，但不应该是这样，应该获得的是指定为“条件图层”的所有feature，所以只能用featurecursor
//如果用featureselection的话就要这么写：
//IFeatureSelection pFeatureSelection = MainaxMapControl.get_Layer(strLayerName) as IFeatureSelection;
//pFeatureSelection.SelectFeatures(null, esriSelectionResultEnum.esriSelectionResultNew, false);//仅使用已被选中的元素时，把这句话越过去
//IEnumFeature pEnumFeature = MainaxMapControl.Map.FeatureSelection as IEnumFeature;
pFeatureClass = pFeatureLayer.FeatureClass;
pFeatureCursor = pFeatureClass.Search(null, true);
pFeature = pFeatureCursor.NextFeature();
}
else //如果使用地图上已选中的元素作为“筛选图层”
{
pEnumFeature = MainAxMapControl.Map.FeatureSelection as IEnumFeature;
pFeature = pEnumFeature.Next();
}
pGeometry = pFeature.Shape;
ITopologicalOperator pTopologicalOperator;
//合并出用以当“筛子”的geometry
while (pFeature != null)
{
//下面第一句是关键，这样最终的pgeometry可以获得整个大的geometry
//因为TopologicalOperator本身就是一个shape，一个geometry，所以结果是它本身与参数的合并.
//只有用shapecopy才能够正确，用shape的话线文件就出错。为了这个问题耽搁了一星期！！！
//还有一种思路也可以。这里的思路是用循环合并参数geometry，另一种思路是在循环用单独的每个
//geometry去筛选图层里的features然后合并结果
pTopologicalOperator = pFeature.ShapeCopy as ITopologicalOperator;
//if (checkBoxBuffer.Checked == true)
//{
// double ddistance = Convert.ToDouble(textBoxBuffer.Text);
// pGeometry = pTopologicalOperator.Buffer(ddistance);
// //pTopologicalOperator.Simplify(); //使拓扑关系变得正确
//}
pGeometry = pTopologicalOperator.Union(pGeometry as IGeometry);
if (checkBoxUseSelectedOnly.Checked == false)//用的是featurecursor
{
pFeature = pFeatureCursor.NextFeature();
}
else
{
pFeature = pEnumFeature.Next();
}
}
//pFeatureSelection.Clear();//如果不清楚这个用来获得geometry而创建的featureselection的话，这也是一句关键，
//后面最终的显示也将把这个featureselection显示出来
//生成缓冲区，放在上面的循环之外执行，这样子更有效率，而且更不容易出错
if (checkBoxBuffer.Checked == true)
{
double ddistance = Convert.ToDouble(textBoxBuffer.Text);
pTopologicalOperator = pGeometry as ITopologicalOperator;
pGeometry = pTopologicalOperator.Buffer(ddistance);
pTopologicalOperator.Simplify(); //使拓扑关系变得正确
//MainAxMapControl.FlashShape(pGeometry, 2, 500, null);//闪烁以验证缓冲区正确与否
}
frmPrompt.WindowState = FormWindowState.Minimized;
frmPrompt.Dispose();
System.Windows.Forms.Application.DoEvents();
object m_fillsymbol; //后面的drawshape的参数必须是object型
IRgbColor pRgb = new RgbColorClass(); // 获取IRGBColor接口
pRgb.Red = 255; // 设置颜色属性
ILineSymbol outline = new SimpleLineSymbolClass(); // 获取ILine符号接口
outline.Width = 5;
outline.Color = pRgb;
ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();// 获取IFillSymbol接口
simpleFillSymbol.Outline = outline;
simpleFillSymbol.Color = pRgb;
simpleFillSymbol.Style = esriSimpleFillStyle.esriSFSBackwardDiagonal;
m_fillsymbol = simpleFillSymbol;
//MainAxMapControl.DrawShape(pGeometry, ref m_fillsymbol);
MainAxMapControl.FlashShape(pGeometry, 3, 500, m_fillsymbol);//闪烁，让用户知道当前的"条件图层"的形状
ISpatialFilter pSpatialFilter = new SpatialFilterClass();
pSpatialFilter.Geometry = pGeometry;
pSpatialFilter.SpatialRel = pSpatialRel; //这是个全局变量
if (checkBoxUseSelectedOnly.Checked == true)
{
pSpatialFilter.GeometryField = "Shape"; //当使用已选中的元素作为“筛选图层”时，
}
//无法像底下那样去获得geometryfield，因为pfeaturelayer(条件图层)为空
else
{
pSpatialFilter.GeometryField = pFeatureLayer.FeatureClass.ShapeFieldName;
}
return(pSpatialFilter);
}
catch (Exception ex)
{
MessageBox.Show("生成“条件图层”出错!请检查 | " + ex.Message);
frmPrompt.Dispose();
return(null);//出错则不返回spatialfitler
}
}
