如何获取SQLServer 的视图

public static DataTable GetViewTableColumn(string viewTableName)
        {
            string sql = " SELECT a.colorder N'字段序号',a.name N'字段名',(case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '√'else '' end) N'标识',(case when (SELECT count(*) FROM sysobjects WHERE (name in (SELECT name FROM sysindexes WHERE (id = a.id) AND (indid in (SELECT indid FROM sysindexkeys WHERE (id = a.id) AND (colid in (SELECT colid FROM syscolumns WHERE (id = a.id) AND (name = a.name))))))) AND (xtype = 'PK'))>0 then 'yes' else '' end) N'主键',b.name N'类型',a.length N'占用字节数',COLUMNPROPERTY(a.id,'PRECISION') as N'长度',isnull(COLUMNPROPERTY(a.id,'Scale'),0) as N'小数位数',(case when a.isnullable=1 then '√'else '' end) N'允许空',isnull(e.text,'') N'默认值'  FROM syscolumns a left join systypes b  on a.xtype=b.xusertype inner join sysobjects d  on a.id=d.id and d.xtype='V' and d.name<>'dtproperties' left join syscomments e on a.cdefault=e.id where d.name='" + viewTableName + "'order by object_name(a.id),a.colorder";
            sqlCommand cmd = new sqlCommand(sql,new sqlConnection(connect.connstr));
            cmd.Connection.open();
            DataSet ds = new DataSet();
            sqlDataAdapter da = new sqlDataAdapter(cmd);
            da.Fill(ds);
            return ds.Tables[0];
      

        }

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//加载字段到checkBoxlist    DataTable dtStoreParas = DataOp.GetViewTableColumn(e.Node.Name); for (int m = 0; m < dtStoreParas.Rows.Count; m++) {     chklColumn.Items.Add(dtStoreParas.Rows[m]["字段名"].ToString(),true); }