Check if value in box is already in database

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I want to check if a value in a label is already in the database. Is it possible?

                    OleDbDataAdapter da = new OleDbDataAdapter("Select * from [Customer Orders] Where [Order ID] = '" + PrdtID.Text + "'", MAcon);
                    DataTable dtbl = new DataTable();
                    da.Fill(dtbl);

                    if (dtbl.Rows.Count == 1)
                    {
.......
}

Each time i get the error message of

An unhandled exception of type 'System.Data.OleDb.OleDbException' occurred in System.Data.dll

Additional information: Syntax error (missing operator) in query expression '[Order ID] = @[Order ID]'.

What I have tried:

OleDbDataAdapter da = new OleDbDataAdapter("Select * from [Customer Orders] Where [Order ID] = @[Order ID]", MAcon);
DataTable dtbl = new DataTable();
da.Fill(dtbl);

Posted 11-Apr-18 10:59am

Member 13765884

Updated 11-Apr-18 11:12am

v2

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Wendelius · Answer 1 · 2018-04-11T11:07:00

Solution 1

The code you have in the latter code block seems like a good start. what you're missing is creating and setting the value of a parameter. In other words something like

C#

OleDbDataAdapter da = new OleDbDataAdapter("Select * from [Customer Orders] Where [Order ID] = @OrderID", MAcon);
da.SelectCommand.Parameters.AddWithValue("@OrderID", PrdtID.Text);
DataTable dtbl = new DataTable();
da.Fill(dtbl);

Posted 11-Apr-18 11:07am

Wendelius

Updated 11-Apr-18 18:33pm

v2

Comments

Maciej Los 12-Apr-18 2:22am

Hawk eye!

Wendelius 12-Apr-18 22:52pm

Thanks!