首先要獲取featureclass，利用featureclass獲取iworkspace和iworkspaceedit：
iworkspace workspace = ((idataset)pfeatureclass).workspace;
iworkspaceeditworkspaceedit = workspace as iworkspaceedit;
然後開啟編輯狀態：
bool startedit = workspaceedit.isbeingedited();
if (!startedit)
workspaceedit.starteditoperation();
然後獲取ifeaturecursor和ifeature：
pfeaturecursor = pfeatureclass.search(pqueryfilter,false);
//注意這裡一定要為false，
//如果為true可能會產生0x80040958的錯誤，遍歷每乙個feature
pfeature = pfeaturecursor.nextfeature();
然後用ifeature.set_value()方法對feature進行屬性錶值的修改：
pfeature.set_value(i, valuetoset);
修改完成，要用ifeature.store()方法儲存：
pfeature.store();
然後最好將feature釋放掉，再進行接下來的修改：
system.runtime.interopservices.marshal.releasecomobject(pfeature);
pfeature = null;
pfeature = pfeaturecursor.nextfeature();
接下來用ifeaturecursor.flush()：
pfeaturecursor.flush();
system.runtime.interopservices.marshal.releasecomobject(pfeaturecursor);
最後停止編輯狀態：
workspaceedit.stopeditoperation();
startedit = workspaceedit.isbeingedited();
if (!startedit)
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