ArcEngine資料編輯 選擇要素

**原文arcengine資料編輯--選擇要素

要編輯要素，首先要選中要素，按shift鍵進行多選，按esc鍵清空選擇。

個人了解的選擇高亮顯示有兩種方式，都是在public override void onmousedown(int button, int shift, int x, int y)事件中處理實現：

1、  ifeatureselection 這個要求明確選擇的圖層

ienvelope penvelope;

double tol = 20

;penvelope =ppoint.envelope;

penvelope.width = penvelope.width +tol;

penvelope.height = penvelope.height +tol;

penvelope.centerat(ppoint);

ispatialfilter pspatialfilter;

pspatialfilter = new

spatialfilterclass();

pspatialfilter.geometry =penvelope;

pspatialfilter.spatialrel =esrispatialrelenum.esrispatialrelintersects;

ifeatureselection pfeatureselection;

pfeatureselection = ucdrawpanel.currentfeaturelayer as

ifeatureselection;

ifeature pfeature;

ucdrawpanel.unionfeature = new list();//

例項化合併要素集

if (shift == 1)}

else

pactiveview.partialrefresh(esriviewdrawphase.esriviewgeoselection, ucdrawpanel.currentfeaturelayer,

null

);//

高亮顯示出來

i******fillsymbol ifillsymbol;

isymbol isymbol;

irgbcolor irgbcolor;

ifillsymbol = new

******fillsymbol();

ifillsymbol.style =esri******fillstyle.esrisfssolid;

irgbcolor = new

rgbcolor();

irgbcolor.green = 128

;ifillsymbol.color =irgbcolor;

isymbol =(isymbol)ifillsymbol;

isymbol.rop2 =esrirasteropcode.esriropnotxorpen;

ienumfeature penumfeature = pactiveview.focusmap.featureselection as

ienumfeature;

penumfeature.reset();

pfeature =penumfeature.next();

//選中要素高亮顯示

if (pfeature != null

) ucdrawpanel.currentfeature = ucdrawpanel.unionfeature[ucdrawpanel.unionfeature.count - 1

]; _mapctrl.flashshape(pgeometry,

1, 500

, isymbol);}//

清空選擇要素

else

2、  selectbymap 基於整個地圖，當然也可以先將圖層的selectable屬性動態設定下

if (button == 1

) 
else
}

ps：esc鍵退出，在onkeydown事件中實現

public

override
void onkeydown(int keycode, int
shift)
}

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