IQueryFilter

[C#]

    public void IQueryFilter__(IFeatureClass featureClass)
    {
        IQueryFilter queryFilter = new QueryFilterClass();

        //Setting the SubFields and WhereClause:
        //if you are updating the geometry you must include the shapefield in the subfields.
        queryFilter.SubFields = "STATE_NAME,POPULATION";
        queryFilter.WhereClause = "STATE_NAME = 'California'";

        //Using a query filter to search a feature class:
        IFeatureCursor featureCursor = featureClass.Search(queryFilter, false);
    }

WhereClaus用法

正确用法

//queryFilter.WhereClause = "ROALS_= 8690";
//queryFilter.WhereClause = "ROALS_= " + ID;

错误用法

queryFilter.WhereClause = "ROALS_= ID";