Re: [.NET] Unable to cast object of type

看板Visual_Basic作者mindscold (喵)時間15年前 (2011/01/17 15:41)推噓3(3推 0噓 5→)

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※ 引述《horngsh ()》之銘言： : ※ 引述《mindscold (喵)》之銘言： : : Dim Table As DataTable = DirectCast(Me.myBindingSource.DataSource, DataTable) : : 並且出現以下的錯誤訊息： : : "Unable to cast object of type 'PICData.PICSettingDataSet' to type : : 'System.Data.DataTable' : : 請問為什麼datasource也是table卻不能轉換成datatable？ : : 該怎麼改才是對的呢？謝謝 : Try : Dim ds as DataSet = CType(Me.myBindingSource.DataSource, DataSet) : Catch ex As Exception : MsgBox(ex.Message) : End Try : Dim dt1 as DataTable = ds.Tables(0) 抱歉，再請教一下關於這部份我已經成功了現在是 Private Sub PICsMBindingSource_AddingNew(ByVal sender As System.Object, ByVal e As System.ComponentModel.AddingNewEventArgs) Handles PICsMBindingSource.AddingNew Dim Ds As DataSet Try Ds = CType(Me.PICsMBindingSource.DataSource, DataSet) Catch ex As Exception MsgBox(ex.Message) End Try Dim dt As DataTable = Ds.Tables(PICsM) Dim rw As DataRow = dt.NewRow rw("MPartID") = getMPartID() e.newobject = rw ^^^^^^^^^^^^^^^^ 跑這行的時候會有錯誤： 'Objects added to a BindingSource's list must all be of the same type.' 這也是因為來源是dataset而非datatable嗎？ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 60.248.17.41

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horngsh

01/17 19:48, , 1^F

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mindscold

01/18 08:22, , 2^F

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horngsh

01/18 10:13, , 3^F

01/18 10:13, 3^F