[英]Parameter @BranchName has no default value
我正在嘗試為我辦公室的計算機部門開發庫存控制系統。 它將跟蹤分支機構的機器進出情況,這些分支機構將被送往總部進行維修。 我還將使用水晶報表顯示Microsoft Access 2010中的所有記錄。單擊輸入表單的保存按鈕時,會彈出此錯誤消息框。
(參數@BranchName沒有默認值)
我將Microsoft Access 2010和C#.NET與VS 2010結合使用。請幫助我。
private void btnSave_Click(object sender, EventArgs e)
{
{
OleDbConnection connect = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0; Data Source=C:\Users\NLA\Documents\Visual Studio 2010\Projects\GlobalTreasureBank\GlobalTreasureBank\GTBDB.accdb;Jet OLEDB:Database Password=admin@GTB");
try
{
connect.Open();
OleDbCommand command = new OleDbCommand();
command.Connection=connect;
command.CommandText= "INSERT INTO Machine (BranchName, MachineName, ArrivedDate, FaultDetail, ReturnDate, Remark, Technician)" + "VALUES (@BranchName, @MachineName, @ArrivedDate, @FaultDetail, @ReturnDate, @Remark, @Technician)";
string BranchName = txtbBranch.Text;
string MachineName = txtbMachine.Text;
string FaultDetail = rtxtbFault.Text;
string Remark = rtxtbRemark.Text;
string Technician = txtbTechnician.Text;
DateTime ArrivedDate = dtpArrive.Value;
DateTime ReturnDate = dtpReturn.Value;
command.Parameters.Add("ArrivedDate", OleDbType.Date);
command.Parameters.Add("ReturnDate", OleDbType.Date);
command.Parameters.AddWithValue("@BranchName", txtbBranch.Text);
command.Parameters.AddWithValue("@MachineName", txtbMachine.Text);
command.Parameters.AddWithValue("@FaultDetail", rtxtbFault.Text);
command.Parameters.AddWithValue("@Remark", rtxtbRemark.Text);
command.Parameters.AddWithValue("@Technician", txtbTechnician.Text);
command.Parameters.AddWithValue("@ArrivedDate", dtpArrive.Value);
command.Parameters.AddWithValue("@ReturnDate", dtpReturn.Value);
command.ExecuteNonQuery();
MessageBox.Show ("Successfully write to database", "Write to Database", MessageBoxButtons.OK, MessageBoxIcon.Information);
connect.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
connect.Close();
}
}
}
}
}
注1: OleDB
不接受named parameters
。
注2: OleDB
參數需要按順序排列。
嘗試這個:
command.CommandText= "INSERT INTO Machine (BranchName, MachineName, ArrivedDate,
FaultDetail, ReturnDate, Remark, Technician) VALUES (?,?,?,?,?,?,?)";
command.Parameters.AddWithValue("@BranchName", txtbBranch.Text);
command.Parameters.AddWithValue("@MachineName", txtbMachine.Text);
command.Parameters.AddWithValue("@ArrivedDate", dtpArrive.Value);
command.Parameters.AddWithValue("@FaultDetail", rtxtbFault.Text);
command.Parameters.AddWithValue("@ReturnDate", dtpReturn.Value);
command.Parameters.AddWithValue("@Remark", rtxtbRemark.Text);
command.Parameters.AddWithValue("@Technician", txtbTechnician.Text);
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