IFeatureClass 獲取字段值

//比如我們給出了確定的圖層名，我們要獲取到該圖層具體有哪些字段？並取出來
//先獲取所有圖層及其名字
    IMap pMap=axMapControl.Map;
    ILayer pLayer=null;
    for(int i=0;i<pMap.Layercount;i++)
    {
        pLayer=pMap.get_layer(i);
        if (pLayer is IFeatureLayer)
        comboBoxEdit1.Properties.Items.Add(layer.Name);
    }
//根據需要獲取指定圖層layer
    string layerName="";
    ILayer layer=null;
    for(int i=0;i<pMap.Layercount;i++)
    {
        if(pMap.get_layer(i).Name==layerName)
        {
            layer=pMap.get_layer(i);
        }
    }
//獲取指定圖層的所有字段名
    IFeatureLayer featureLayer=layer as IFeatureLayer;
    IfeatureClass featureclass=featureLayer.FeatureClass;
    IFields fields=featureclass.fields;
    for(int i=0;i<featureclass.fields.fieldcount;i++)
    {
        IField field=fields.get_field(i);
        listBoxControl1.Items.Add(field.Name);
        listBoxControl1.SelectedIndex = 0;
    }
//獲取某個特定字段的所有值
    IFeatureClass featureclass=featureLayer.FeatureClass；

//設定篩選條件獲得滿足要求的所有Feature
    IQueryFilter queryFilter = new QueryFilterClass();
    queryFilter.WhereClause = "";
    IFeatureCursor featurecursor=featureClass.search(queryFilter,false);
    IFeature feature=featureCursor.NextFeature;
//獲取想要獲取的字段值的fieldName的id號
    string name="";
    int index=0;
    for(int i=0;i<fields.fieldcount;i++)
    {
        IField field=fields.get_field(i);
        if(field.Name==name)
        {
            indesx=i;
        }
    }
    while(feature!=null)
    {
        listBoxControl2.Items.Add(feature.get_Value(index).ToString());
        feature=featureCursor.NextFeature;
    }