How to pass a Variable/Function into SQL Query? - sql

Question

I am attempting to Insert a Row on a Table, but I cannot seem to pass the TASK_ID as a value/variable/function into the SQL Statement. Throughout the application, to acquire TASK_ID, I use:
Dim taskID = ds.Tables("ReminderTable").Rows(Count).Field(Of Integer)("TASK_ID")
Some helpful context-code :
da.Fill(ds, "ReminderTable")
Count = ds.Tables("ReminderTable").Rows.Count - 1
Here is what I'm trying to do:
da.InsertCommand = New OleDbCommand("INSERT INTO ACTIVITY (TASK_ID, ACTIVITY_CDE, ACTIVITY_NOTE) VALUES (3827, 1, 'Reminder Sent: ' & Now)", Connection)
I keep receiving the error
No value given for one or more required parameters.
when I replace 3827 with a variable/function/reference.
The statement works as-is, but I need to replace "3827" in the above statement with the TASK_ID, but it won't accept my variable, a function or the location that I use elsewhere throughout the project to reference the same thing.
I'm working in Visual Studio 2019, using a Microsoft Access Database

Answer 1

Use String Interpolation
da.InsertCommand = New OleDbCommand(
$"INSERT INTO ACTIVITY (TASK_ID, ACTIVITY_CDE, ACTIVITY_NOTE)
VALUES ({taskID}, 1, 'Reminder Sent: ' & Now())", Connection)
If getting the date and time from .NET, you would be able to add that with string interpolation as well
da.InsertCommand = New OleDbCommand(
$"INSERT INTO ACTIVITY (TASK_ID, ACTIVITY_CDE, ACTIVITY_NOTE)
VALUES ({taskID}, 1, 'Reminder Sent: {DateTime.Now}')", Connection)

Answer 2

Try Adding the Actual Dimension to your First Line of code Like so:
Dim taskID as Integer = ds.Tables("ReminderTable").Rows(Count).Field(Of Integer)("TASK_ID")
You could also write like this:
Dim taskID as Integer = ds.Tables("ReminderTable").Rows(Count)("TASK_ID")
Hope this helps

Answer 3

Here is a really basic example. It is in C#, but you can easily translate it into VB. The important part is the cmd.Parameters.AddWithValue.
public int Create(EmployeeClassification classification)
{
if (classification == null)
throw new ArgumentNullException(nameof(classification), $"{nameof(classification)} is null.");
const string sql = #"INSERT INTO EmployeeClassification (EmployeeClassificationName) VALUES(#EmployeeClassificationName )";
using (var con = OpenConnection())
using (var cmd = new OleDbCommand(sql, con))
{
cmd.Parameters.AddWithValue("#EmployeeClassificationName", classification.EmployeeClassificationName);
return cmd.ExecuteNonQuery();
}
}
Source: https://grauenwolf.github.io/DotNet-ORM-Cookbook/SingleModelCrud.htm#ado.net