Foreach循环正确

Question

我有一个数据表,我试图循环遍历行并创建一个zipCode数组.这个问题,我只得到一个数字4次.我知道我做错了什么但是有人可以指出这一点并给予解释.

谢谢

    public string bindMap()
{

    using (dal.Sys.RegionTableAdapters.region_countyListTa ta = new Cea.WebApp.JobsEq.Dal.Sys.RegionTableAdapters.region_countyListTa())
    {
        List<string> code = new List<string>();

        dal.Sys.Region.region_countyListDataTable dt = ta.GetData(region.RegionType, region.RegionCode);
        foreach (var row in dt)
        {                
            code.Add(region.ZipCode);                

        }//end foreach loop

        string codes = string.Join(",", code.ToArray());
        return codes.ToString();


    }//end for each loop        
}//end bind map

Answer 1

您没有使用您正在迭代的变量.

   foreach (var row in dt)
    {                
        //Not sure how you will get ZipCode from the ROW, but you get the idea. 
        code.Add(row["ZipCode"]);                

    }//end foreach loop