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OleDbException: No value given for one or more required parameters
Hi,
I got error "No value given for one or more required parameters" error when executing the following code. I checked the value of the query and it seems correct. Does anyone know why?
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Catherine\\Documents\\LearningCSharp.accdb";
OleDbConnection myConnection = new OleDbConnection(connectionString);
myConnection.Open();
int employeeNumber = int.Parse(textBox1.Text);
string name = textBox2.Text;
string address = textBox3.Text;
string query = "update EMPLOYEE set EmployeeName='"+ name + "', Address='"+ address + "' where EmployeeID = "+ employeeNumber;
OleDbCommand myCommand = new OleDbCommand();
myCommand.CommandText = query;
myCommand.Connection = myConnection;
myCommand.ExecuteNonQuery();
myConnection.Close();
Thanks in advance.
Thanks for your reply. I tried replace command but the issue persists.
I checked the value of query. It's like following:
"update EMPLOYEE set EmployeeName='Catherine Sea', Address='Vancouver, BC' where EmployeeID = 1"
Any problem with this?
>No value given for one or more required parameters.
Error says that the column name(s) or a table name in given query are not belongs to the table - Employee. Please open the .accdb and check/verify the name of columns/table.
Second, try to use parametrized queries.
__avd
Posting Genius (adatapost)
Moderator
8,648 posts since Oct 2008
Reputation Points: 2,136
Solved Threads: 1,241
I think you are not doing this correctly. i haven't touched ole for long now, but change your code to look like this
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Catherine\\Documents\\LearningCSharp.accdb";
OleDbConnection myConnection = new OleDbConnection(connectionString);
myConnection.Open();
int employeeNumber = int.Parse(textBox1.Text);
string name = textBox2.Text;
string address = textBox3.Text;
string query = "update EMPLOYEE set EmployeeName=<strong> ?</strong> , Address=<strong>?</strong> where EmployeeID = <strong>?</strong>";
OleDbCommand myCommand = new OleDbCommand();
myCommand.Parameters.Add("@name").value = name;
myCommand.Parameters.Add("@employeeNumber").value = address;
myCommand.Parameters.Add("@employeeNumber").value = employeeNumber;
myCommand.CommandText = query;
myCommand.Connection = myConnection;
myCommand.ExecuteNonQuery();
myConnection.Close();
The Sequence of the parameters must be the same. That means the first "?" must correspond to the first definition of the parameter. you got that error because your sql statement tells ado.net that there is a parameter and when it look it does not find any definition of a parameter.
Thanks in advance.[/QUOTE]
Thanks for all your reply. I have found the cause. I wrote a column name wrongly....
I also tried vuyiswamb's suggestion. But it seems it does not let me call command like "myCommand.Parameters.Add("@name").value = name;" directly. Instead I used the code like following:
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Amy Jia\\Documents\\LearningCSharp.accdb";
OleDbConnection myConnection = new OleDbConnection(connectionString);
myConnection.Open();
int employeeNumber = int.Parse(textBox1.Text);
string name = textBox2.Text;
string address = textBox3.Text;
string query = "update EMPLOYEE set EmployeeName=@name, EmployeeAddr=@address where EmployeeID =@employeeNumber";
OleDbCommand myCommand = new OleDbCommand();
myCommand.Parameters.Add("@name",OleDbType.VarChar);
myCommand.Parameters.Add("@address", OleDbType.VarChar);
myCommand.Parameters.Add("@employeeNumber", OleDbType.VarChar);
myCommand.Parameters["@name"].Value = name;
myCommand.Parameters["@address"].Value = address;
myCommand.Parameters["@employeenumber"].Value = employeeNumber;
myCommand.CommandText = query;
myCommand.Connection = myConnection;
myCommand.ExecuteNonQuery();
myConnection.Close();
Cheers,
anyone can help me.
i have the same problem..
Imports System.Data.OleDb
Public Class Form3
Public connString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=HSMS.accdb"
Dim conn As New OleDbConnection
Dim myqry As String = Nothing
Dim mycmd As New OleDbCommand
Dim mydr As OleDbDataReader
Dim str As String = Nothing
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Call LVsettings()
Call ConnToDB()
Call FillListview()
Call Set1()
End Sub
#Region "FillListView"
Sub FillListview()
LV.Items.Clear()
myqry = "SELECT * from Hardware"
mycmd = New OleDbCommand(myqry, conn)
mydr = mycmd.ExecuteReader
While mydr.Read
With LV
.Items.Add(mydr("Component_ID"))
With .Items(.Items.Count - 1).SubItems
'.Add(mydr("Component_ID"))
.Add(mydr("Product"))
.Add(mydr("Model"))
.Add(mydr("DO_Purchase"))
.Add(mydr("Contract_Duration"))
.Add(mydr("Purchase_Price"))
.Add(mydr("Supplier"))
.Add(mydr("Maintenance"))
.Add(mydr("Warranty_End"))
.Add(mydr("Description"))
.Add(mydr("Dept_ID"))
.Add(mydr("Location"))
.Add(mydr("Owner"))
End With
End With
End While
End Sub
#End Region
#Region "Connection"
Sub ConnToDB()
Try
With conn
If .State = ConnectionState.Open Then .Close()
.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=HSMS.accdb"
.Open()
End With
Catch ex As Exception
MessageBox.Show("Unable to connect", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Application.Exit()
End Try
End Sub
#End Region
#Region "LVSettings"
Sub LVsettings()
With LV.Columns
.Add("Component_ID", 100, HorizontalAlignment.Left)
.Add("Product", 100, HorizontalAlignment.Left)
.Add("Model", 100, HorizontalAlignment.Left)
.Add("DO_Purchasee", 100, HorizontalAlignment.Left)
.Add("Contract_Duration", 100, HorizontalAlignment.Left)
.Add("Purchase_Price", 100, HorizontalAlignment.Left)
.Add("Supplier", 100, HorizontalAlignment.Left)
.Add("Maintenance", 100, HorizontalAlignment.Left)
.Add("Warranty_End", 100, HorizontalAlignment.Left)
.Add("Description", 100, HorizontalAlignment.Left)
.Add("Dept_ID", 100, HorizontalAlignment.Left)
.Add("Location", 100, HorizontalAlignment.Left)
.Add("Owner", 100, HorizontalAlignment.Left)
End With
End Sub
#End Region
#Region "object Settings "
Sub Set1()
btnAdd.Enabled = True
btnUpdate.Enabled = True
btnDelete.Enabled = True
btnback.Enabled = True
btnSave.Enabled = False
btnCancel.Enabled = False
Dim txt As Control
For Each txt In Me.Controls
If TypeOf txt Is TextBox Then
txt.Enabled = False
End If
Next
LV.Enabled = True
End Sub
Sub Set2()
btnAdd.Enabled = False
btnUpdate.Enabled = False
btnDelete.Enabled = False
btnback.Enabled = False
btnSave.Enabled = True
btnCancel.Enabled = True
Dim txt As Control
For Each txt In Me.Controls
If TypeOf txt Is TextBox Then
txt.Enabled = True
End If
Next
LV.Enabled = False
End Sub
#End Region
#Region "CLEAR TEXTBOX"
Sub ClearAlltextBox()
ComboBox1.SelectedItem = Nothing
ComboBox2.SelectedItem = Nothing
ComboBox3.SelectedItem = Nothing
Dim a As Control
For Each a In Me.Controls
If TypeOf a Is TextBox Then
a.Text = Nothing
End If
Next
End Sub
#End Region
Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
Application.Exit()
End Sub
Private Sub btnback_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnback.Click, btnExit.Click
Me.Hide()
Form2.Show()
End Sub
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
str = "add"
Call Set2()
Call ClearAlltextBox()
End Sub
Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
If TextBox1.Text = "" Then
MessageBox.Show("Please Select Record to Update", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Else
str = "update"
Call Set2()
'TextBox1.Enabled = True
End If
End Sub
Private Sub btnCancel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCancel.Click
Call Set1()
Call ClearAlltextBox()
End Sub
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
If str = "add" Then
''''''ADD NEW RECORD'''''''
If TextBox1.Text = "" Or ComboBox1.SelectedItem = "" Or TextBox3.Text = "" Then
MessageBox.Show("All fields Are Required", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Else
myqry = "INSERT INTO Hardware (Component_ID, Product, Model, DO_Purchase, Contract_Duration, Purchase_Price, Supplier, Maintenance, Warranty_End, Description, Dept_ID, Location, Owner)"
myqry = myqry + "VALUES('" & TextBox1.Text & "','" & ComboBox1.SelectedItem & "','" & TextBox3.Text & "','" & DateTimePicker1.Value.Date & "','" & TextBox2.Text & "','" & TextBox4.Text & "','" & TextBox5.Text & "','" & TextBox6.Text & "','" & DateTimePicker2.Value.Date & "','" & TextBox7.Text & "','" & ComboBox2.SelectedItem & "','" & ComboBox3.SelectedItem & "','" & TextBox10.Text & "')"
mycmd = New OleDbCommand
With mycmd
.CommandText = myqry
.Connection = conn
.ExecuteNonQuery()
End With
Call Set1()
End If
Else
''''''''''UPDATE RECORD'''''''
If TextBox1.Text = "" Or ComboBox1.SelectedItem = "" Or TextBox3.Text = "" Or TextBox2.Text = "" Or TextBox4.Text = "" Or TextBox5.Text = "" Or TextBox6.Text = "" Then
MessageBox.Show("All fields Are Required", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Call Set1()
Else
myqry = "UPDATE Hardware SET"
'myqry = myqry + " Component_ID = '" & TextBox1.Text & "',"
myqry = myqry + " Product = '" & ComboBox1.SelectedItem & "',"
myqry = myqry + " Model = '" & TextBox3.Text & "',"
myqry = myqry + " DO_Purchase = '" & DateTimePicker1.Value.Date & "',"
myqry = myqry + " Contract_Duration = '" & TextBox2.Text & "',"
myqry = myqry + " Purchase_Price = '" & TextBox4.Text & "',"
myqry = myqry + " Supplier = '" & TextBox5.Text & "',"
myqry = myqry + " Maintenance = '" & TextBox6.Text & "',"
myqry = myqry + " Warranty_End = '" & DateTimePicker2.Value.Date & "',"
myqry = myqry + " Description = '" & TextBox7.Text & "',"
myqry = myqry + " Dept_ID = '" & ComboBox2.SelectedItem & "',"
myqry = myqry + " Location = '" & ComboBox3.SelectedItem & "',"
myqry = myqry + " Owner = '" & TextBox10.Text & "'"
myqry = myqry + " WHERE "
myqry = myqry + " Component_ID = " & TextBox1.Text
mycmd = New OleDbCommand(myqry, conn)
mycmd.ExecuteNonQuery()<-----No value given for one or more required parameters.
Call Set1()
End If
End If
Call FillListview()
Call ClearAlltextBox()
End Sub
Private Sub btnDelete_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDelete.Click
If MsgBox("Are you sure you want to delete this record?", MsgBoxStyle.Question + MsgBoxStyle.YesNo) = MsgBoxResult.Yes Then
myqry = "DELETE FROM Hardware WHERE Component_ID = " & TextBox1.Text
mycmd = New OleDbCommand(myqry, conn)
mycmd.ExecuteNonQuery()<----No value given for one or more required parameters.
End If
Call ClearAlltextBox()
Call FillListview()
End Sub
Private Sub LV_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles LV.SelectedIndexChanged
If LV.SelectedItems.Count > 0 Then
With LV.SelectedItems(0)
TextBox1.Text = .Text
ComboBox1.SelectedItem = .SubItems(1).Text
TextBox3.Text = .SubItems(2).Text
DateTimePicker1.Value = .SubItems(3).Text
TextBox2.Text = .SubItems(4).Text
TextBox4.Text = .SubItems(5).Text
TextBox5.Text = .SubItems(6).Text
TextBox6.Text = .SubItems(7).Text
DateTimePicker2.Value = .SubItems(8).Text
TextBox7.Text = .SubItems(9).Text
ComboBox2.SelectedItem = .SubItems(10).Text
ComboBox3.SelectedItem = .SubItems(11).Text
TextBox10.Text = .SubItems(12).Text
End With
End If
End Sub
End Class
I HAVE PROBLEM WHEN DELETE AND UPDATE
This question has already been solved
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