Vb.net 将数据表中的一列与同一数据表中的另一列相加

我有一个Datatable，它具有来自数据库的以下结果

ID  Name           Class    FeeName       Amount
9   gumman hgjgh    6Th      Fine            0
9   gumman hgjgh    6Th   Tution Fee       3000
9   gumman hgjgh    6Th   Lebority Fee     500
10  AAdil Hussain   5Th     Fine             0
10  AAdil Hussain   5Th   Tution Fee       3000
10  AAdil Hussain   5Th   Lebority Fee      500

我想根据每个ID汇总金额，所以我实现了以下代码

Dim TotalAmount As New DataColumn("TotalAmount", GetType(Double), "Sum(Amount)")
Dtable.Columns.Add(TotalAmount)

但结果如下

ID  Name           Class    FeeName       Amount      TotalAmount
9   gumman hgjgh    6Th      Fine            0           7000
9   gumman hgjgh    6Th   Tution Fee       3000          7000
9   gumman hgjgh    6Th   Lebority Fee     500           7000
10  AAdil Hussain   5Th     Fine             0           7000
10  AAdil Hussain   5Th   Tution Fee       3000          7000
10  AAdil Hussain   5Th   Lebority Fee      500          7000

但我想把每个名字或身份证的金额加起来

---

我不知道LINQ

恐怕

数据表的

不能

求和（金额）超过（按ID划分）

以下是LINQ解决方案：

Dim idGroupAmounts =
    From row In DTable
    Group row By ID = row.Field(Of Int32)("ID") Into IDRowGroup = Group
    Select New With {
        .ID = ID,
        .IDRows = IDRowGroup,
        .IdSum = IDRowGroup.Sum(Function(row) row.Field(Of Double)("Amount"))
    }
For Each idGrpAmount In idGroupAmounts
    Dim id = idGrpAmount.ID
    Dim totalAmount = idGrpAmount.IdSum
    Dim rows = idGrpAmount.IDRows
Next

---

很抱歉，

数据表的

不能

按ID划分的总和（金额）

以下是LINQ解决方案：

Dim idGroupAmounts =
    From row In DTable
    Group row By ID = row.Field(Of Int32)("ID") Into IDRowGroup = Group
    Select New With {
        .ID = ID,
        .IDRows = IDRowGroup,
        .IdSum = IDRowGroup.Sum(Function(row) row.Field(Of Double)("Amount"))
    }
For Each idGrpAmount In idGroupAmounts
    Dim id = idGrpAmount.ID
    Dim totalAmount = idGrpAmount.IdSum
    Dim rows = idGrpAmount.IDRows
Next

---

谢谢你的帮助。我在sql查询中使用了

SUM（Amount）OVER（partitionbyid）

，我希望从中获得结果，因此找到了所需的输出。谢谢帮助。我在sql查询中使用了

SUM（Amount）OVER（partitionbyid）

，从中我想要得到结果，所以我找到了我想要的输出。