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Yes I know what Option Strict does and I use it quite often. My issue is stemming from my Linq query and I can't seem to figure out how to get it from throwing up. I am wanting to get all DataRows in a given table where a row's id equals an id I give it. Also this query works just fine without Option Strict on a I get the rows I need, but I want to have it on.

The error: Option Strict on disallow's late binding

Here's what I have right now...

  Dim cRows() As DataRow = (From cRow In MasterDataSet.Tables(1).Rows Where cRow(childTableKey) = intParID).ToArray

The error is happening underneath: cRow(childTableKey)

I know what the error mean's as well, but can't seem to figure how to stop it from seeing it as an error. I have tried casting it and such already as well...

4

3 回答 3

0

尝试使用

In MasterDataSet.Tables(1) Where CType(cRow(childTableKey), Integer)

代替

In MasterDataSet.Tables(1).Rows Where cRow(childTableKey)

下面的示例使用 Option Strict 对我有用：

    Dim ds As New DataSet
    Dim dt As New DataTable
    ds.Tables.Add(dt)
    Dim dc As New DataColumn
    dc.DataType = GetType(System.Int32)
    dt.Columns.Add(dc)
    Dim dr As DataRow = dt.NewRow
    dr(0) = 10
    dt.Rows.Add(dr)

    Dim rows As DataRow() = (From r In ds.Tables(0) Where CType(r(0), Integer) = 10).ToArray
于 2015-03-20T20:50:47.163 回答
0

尝试这个：

Dim filteredTable1Data= MasterDataSet.Tables(1).AsEnumerable().
    Where(Function(r) r.Field(of Integer)("childTableKey")=intParID)

有关详细信息，请参阅：
LINQ to DataSet 中的查询
LINQ to DataSet 示例
从查询创建数据表 (LINQ to DataSet)

于 2015-03-20T21:34:09.477 回答
0

如果没有额外的扩展，您需要将行从 复制RowCollection到Array. 然后你可以使用 LINQ。

Dim myRows(-1) as DataRow
MasterDataSet.Tables(1).Rows.CopyTo(myRows, 0)

 Dim cRows() As DataRow = (From cRow In myRows 
    Where CInt(cRow(childTableKey)) = intParID).ToArray()
于 2015-03-20T21:37:36.067 回答