我研究出来的属性查询，贴自己的代码，请大家指教

//把所有的字段都读进来

private void Form2_Load(object sender, EventArgs e)

        {
            
            int i;
            ILayer pLayer=mFormShow1.axMapControl1.Map.get_Layer(0);
            IFeatureLayer pFeatureLayer = (IFeatureLayer)pLayer;
            IFeatureClass pFeatureClass = pFeatureLayer.FeatureClass;
            IField pField;
            for (i = 0; i < pFeatureClass.Fields.FieldCount; i++)
            {
                pField = pFeatureClass.Fields.get_Field(i);
                comboBox1.Items.Add(pField.Name);
            }


        }
//根据条件进行查询
        private void button1_Click(object sender, EventArgs e)
        {
            
            ILayer pLayer = mFormShow1.axMapControl1.get_Layer(0);
            IGeoFeatureLayer pGeoFeatureLayer = (IGeoFeatureLayer)pLayer;
            ITable pTable = (ITable)pGeoFeatureLayer;
            IQueryFilter pQueryFilter = new QueryFilterClass();

            IFeatureCursor pFeatureCursor;
            ICursor pCursor;
            IFeature pFeature;

            pQueryFilter.WhereClause = comboBox1.Text + comboBox2.Text + textBox1.Text;
            pCursor = pTable.Search(pQueryFilter, true);
            pFeatureCursor = (IFeatureCursor)pCursor;

            pFeature = pFeatureCursor.NextFeature();

            while (pFeature != null)
            {
                mFormShow1.axMapControl1.Map.SelectFeature(pGeoFeatureLayer, pFeature);
                pFeature = pFeatureCursor.NextFeature();
            
            }
            mFormShow1.axMapControl1.Refresh();
            int RowCount = pTable.RowCount(pQueryFilter);
            MessageBox.Show(RowCount.ToString());



        }