Question

 DataTable tblData = new DataTable();
                MySQLProcessor.dtTable(pullDataQuery, out tblData);
                foreach (DataRow columnRow in tblData.Rows)
                {
                  //do string work here
                }

columnRow看起来像这样 [0]苹果
[1]梨
[2]芒果

我想把它变成一个看起来像Apple | Pear | Mango
的字符串没有在数组中执行foreach循环。

Soryr没有说清楚，每张桌子都有不同数量的阵列。

Answer 1

尝试

object[] arr = new object[] {"1", "2" };
string joinedStr = string.Join("|",arr.Select(p => p.ToString()).ToArray());

因此，您的代码可能会变成

     DataTable tblData = new DataTable();
              string myStr = string.Empty; 
                    MySQLProcessor.dtTable(pullDataQuery, out tblData);
                    foreach (DataRow columnRow in tblData.Rows)
                    {
                      myStr = string.Join("|",columnRow.ItemArray.Select(p => p.ToString()).ToArray());
                      //do whatever you want
                    }

Answer 2

考虑String.Join。必须先提取有问题的列值，也许......

var cols = row.ItemArray
    .Select(i => "" + i) // Not i.ToString() so when i is null -> ""
    .ToArray(); // For .NET35 and before, .NET4 Join takes IEnumerable

var res = string.Join("|", cols);

......或类似的。

快乐的编码。

Answer 3

迈克，你可以做这样的事情

string finalString=string.Empty;

foreach (DataRow columnRow in tblData.Rows)
                {
           finalString+=columnRow["ColumnName"]+"|";
                }
if(finalyString.length>0)
{
finalyString=finalString.Substring(0,finalString.length-1) // this removes extra "|" at the end
}

Answer 4

//Without Using LINQ. In case you use old DotNet (Eg.2.0)
string ArrToStr(DataRow r,string separator)
{
   string temp = "";
   Object[] o = r.ItemArray;
   foreach(Object oo in o)
   {
     temp += oo.ToString() + separator;
   }            
   return temp;
}
//So you can use like this.
string value="";
foreach (DataRow row in combine.Rows)
{
   value += ArrToStr(row, ",") ;
}

Answer 5

试试这个：

string record = columnRow[0].ToString() + "|" + columnRow[1].ToString() + "|" + columnRow[2].ToString();

C＃DataRow将所有的itemarrays转换成单个字符串，追加|到每个阵列

5 个答案: