別のコードを試しました。
これは私が使用しているすべてのコードです...
Imports System.Data
Imports System.Data.OleDb
Imports System.Data.Odbc
Imports System.Data.DataTable
Public Class Form1
Dim provider As String
Dim dataFile As String
Dim connString As String
Dim addstring As String
Dim cnn As OleDbConnection = New OleDbConnection
Dim ds As DataSet = New DataSet
Dim da As OleDbDataAdapter
Dim tables As DataTableCollection = ds.Tables
Dim cmd As New OleDb.OleDbCommand
Dim dr As System.Data.OleDb.OleDbDataReader
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
t_date.Text = Today
provider = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source="
dataFile = "C:\Users\hp-2\Documents\Visual Studio 2012\Projects\Delta\Delta.mdb"
connString = provider & dataFile
cnn.ConnectionString = connString
da = New OleDbDataAdapter("Select Customer_Name, Job, Amount from [Transaction]
where Trans_date = Date()", cnn)
da.Fill(ds, "Transaction")
Dim view1 As New DataView(tables(0))
Dim source1 As New BindingSource()
source1.DataSource = view1
showdata.DataSource = view1
showdata.Refresh()
cnn.Close()
End Sub
Private Sub btmclose_Click(sender As Object, e As EventArgs) Handles btmclose.Click
Me.Close()
End Sub
Private Sub C_job_SelectedIndexChanged(sender As Object, e As EventArgs) Handles C_job.SelectedIndexChanged
Dim selected As String = C_job.SelectedItem.ToString()
If selected = "Internet" Then
t_amount.Text = "20"
php.Visible = True
ElseIf selected = "Games" Then
t_amount.Text = "10"
php.Visible = True
ElseIf selected = "Print (short)" Then
t_amount.Text = "1"
php.Visible = True
ElseIf selected = "Print (long)" Then
t_amount.Text = "2"
php.Visible = True
ElseIf t_amount.Text = "" Then
php.Visible = False
End If
End Sub
Private Sub btnadd_Click(sender As Object, e As EventArgs) Handles btnadd.Click
provider = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="
dataFile = "C:\Users\hp-2\Documents\Visual Studio 2012\Projects\Delta\Delta.mdb"
connString = provider & dataFile
cnn.ConnectionString = connString
cnn.Open()
cmd.Connection = cnn
addstring = "insert into Transaction (Customer_Name, Job, Trans_date, Amount ) " & _
" values (@cname, @job, @tdate, @amount)"
Using conn As New OleDbConnection(connString)
Using comm As New OleDbCommand()
With comm
.Connection = conn
.CommandType = CommandType.Text
.CommandText = addstring
.Parameters.AddWithValue("@cname", C_name.Text)
.Parameters.AddWithValue("@job", C_job.Text)
.Parameters.AddWithValue("@date", Convert.ToDateTime(t_date.Text.Length))
.Parameters.AddWithValue("@amount", Convert.ToInt64(t_amount.Text))
End With
Try
conn.Open()
comm.ExecuteNonQuery()
Catch ex As Exception
End Try
End Using
End Using
cmd.ExecuteNonQuery()
cnn.Close()
End Sub
End Class
エラー：
Additional information: Invalid cast from 'Int32' to 'DateTime'.
私のテーブル名は Transaction (Transaction_Id, Customer_name, Job, t_date, amount) です --> Transaction_Id は ms-access の AutoIncrement です..
したがって、私のプロジェクトのテキストボックスは次のとおりです。
- 顧客名、
- 額、
- t_date
コンボボックスは次のとおりです。
- 仕事