c# - 以逗号，管道分隔格式获取数据表行数据和列

Question

我的 C#DataTable格式如下

Name    Value1  Value2  Value3
A          5       5    0
B          6       3    1
C          4       9    9

字符串中的预期格式应为

string sDataTableOutput = "A,B,C|Value1,5,6,4|Value2,5,3,9|Value3,0,1,9";

我想要带有数据的列标题（第一列除外）

我努力写下面的代码，但无法完成

DataTable dtGraphOutput[0] = //Get DataTable Data ; 

foreach (DataColumn dcOutput in dtGraphOutput[0].Columns)
{
    foreach (DataRow drOutput in dtGraphOutput[0].Rows)
    {                                        
        sTicketTypeCount += ((sTicketTypeCount == "") ? "" : ",") + dcOutput.ColumnName + Convert.ToString(drOutput[dcOutput]);
    }
    sTicketTypeCount += ((sTicketTypeCount == "") ? "" : "|");
}

它给了我输出

NameA,NameB,NameC|,Value15,Value16,Value14|,Value25,Value23,Value29|,Value30,Value31,Value39|

Answer 1

这是 LINQ，可为您提供所需的结果：

var rows = dt.AsEnumerable();
var firstCol = string.Join(",", rows.Select(r => r.Field<string>(0)));
var otherColumns = dt.Columns.Cast<DataColumn>().Skip(1)
    .Select(dc => string.Format("{0},{1}", 
        dc.ColumnName, 
        string.Join(",", rows.Select(r => r.Field<int>(dc)))));
string sDataTableOutput = string.Format("{0}|{1}", 
    firstCol, 
    string.Join("|", otherColumns));

结果：A,B,C|Value1,5,6,4|Value2,5,3,9|Value3,0,1,9

Answer 2

string sDataTableOutput = string.Join("|", 
                           dtGraphOutput[0].Columns
                                           .OfType<DataColumn>()
                                           .Select((c,i) =>
                                              string.Join(",",
                                              dtGraphOutput[0].Rows
                                                              .OfType<DataRow>()
                                                              .Select((r,j)=>
                                                          (j == 0 && i != 0 ? c.ColumnName + "," : "") + r[c.ColumnName])
                                                              .ToArray())).ToArray());
                                                                             .

Answer 3

尝试这个：

DataTable dtGraphOutput[0] = //Get DataTable Data ; 

foreach (DataColumn dcOutput in dtGraphOutput[0].Columns)
{
    sTicketTypeCount +=dcOutput.ColumnName
    foreach (DataRow drOutput in dtGraphOutput[0].Rows)
    {                                        
        sTicketTypeCount += ","+ dcOutput.ColumnName + Convert.ToString(drOutput[dcOutput]);
    }
    sTicketTypeCount += ((sTicketTypeCount == "") ? "" : "|");
}

如果您对最后一个“|”有疑问 你可以用一个简单的 if 删除它