How to display data between two dates in mysql vb - mysql

Question

I have a form that is responsible for displaying sales that were made based on date. I have got two date pickers FROM & TO. What I want is when I want to search data example from 12 to 19th it only displays 13th and 19th, I want it to show dates between 12 and 19 i.e. 12th,13th,14th,15th,....till 19th, But it only shows two dates 13th and 19th which I haven't asked in the date picker. I selected 12 and 19 and it displayed 13 and 19. In my database, I can 12th date is there on the database. I tried to check my code where I went wrong and followed the same MySQL syntax for selecting data from the database based on data.
This is my code:
Private Sub btnShowAll_Click(sender As Object, e As EventArgs) Handles btnShowAll.Click
MysqlConn = New MySqlConnection
MysqlConn.ConnectionString = "server=localhost;userid=root;password=root;database=golden_star"
''connecting data grid with the database
Dim Sda As New MySqlDataAdapter
Dim dbdataset As New DataTable
Dim bSource As New BindingSource
Try
MysqlConn.Open()
Dim Query As String
Dim sum As Decimal = 0
Query = "select * from sales where date between '" + FromDate.Text + "' and '" + ToDate.Text + "'"
Command = New MySqlCommand(Query, MysqlConn)
Sda.SelectCommand = Command
Sda.Fill(dbdataset)
bSource.DataSource = dbdataset
DataGridView1.DataSource = bSource
Sda.Update(dbdataset)
For i = 0 To DataGridView1.Rows.Count - 1
sum += DataGridView1.Rows(i).Cells(8).Value
Next
lblSum.Text = sum
MysqlConn.Close()
Catch ex As MySqlException
MessageBox.Show(ex.Message)
Finally
MysqlConn.Dispose()
End Try
End Sub
THIS IS THE OUTPUT OF THE CODE:
https://snipboard.io/PdpcUz.jpg
I have already declared the MySQL command and the imports in my code above.
I don't know where I went wrong or have I missed a piece of code somewhere?
Please help. Thank you.

Answer 1

This is how I would write that code:
Query = "select * from sales where date >= #init AND date <= #end"
Command = New MySqlCommand(Query, MysqlConn)
Command.Parameters.Add("#init", MySqlDbType.Date).Value = From.Value.Date
Command.Parameters.Add("#end", MySqlDbType.Date).Value = To.Value.Date
Sda.SelectCommand = Command
Sda.Fill(dbdataset)
bSource.DataSource = dbdataset
DataGridView1.DataSource = bSource
Now the query text has no more concatenations but just parameters placeholders and the search is executed using the standard operators.
The command itself is loaded with two parameters matching the placeholders'name. Important part is the parameter type that should match the database column type and finally I take the Value property that is a DateTime and not a string representation of it and use only the Date part of that value