Update From DataGridView to Database - vb.net

Question

Dim sb As New MySqlConnectionStringBuilder
sb.Server = Form1.hostname.Text
sb.UserID = Form1.rootuser.Text
sb.Password = Form1.rootpassword.Text
sb.Database = Form1.hostdb.Text
sb.Port = Form1.hostport.Text
Using connection As New MySqlConnection(sb.ConnectionString)
Try
connection.Open()
Dim adapter1 As New MySqlDataAdapter(TextBox1.Text, connection)
Dim cmdb1 = New MySqlCommandBuilder(adapter1)
Dim ds As New DataSet
Dim words As String() = TextBox1.Text.Split(New Char() {" "c})
Dim tablenamewords = (words(3))
adapter1.Update(ds, tablenamewords)
Catch ex As MySqlException
MessageBox.Show(ex.Message)
Finally
connection.Dispose()
End Try
End Using
It's giving me this error:
Update unable to find TableMapping['creature_template'] or DataTable 'creature_template'.
I want to select items then use a DataGrid to update them.
Note: tablenamewords = "creature_template"

Answer 1

You can solve this in alot of different methods.
I prefer to update the DB with a single query every time the the user ends editing a cell.
BUT FIRST you have to bind a source to your DataGridView!
How to bind a source:
Go to your application design an click on your DataGridView
Click on the pause/start like little button as shown:
Click on the "ComboBox" like textbox labeled as "chose data source" as shown and click on it:
It will open a "form", click on the Add data source as shown:
Follow the wizard, you can do it without any furhter explanation!
Well done, you almost completed it. Just go in your code, and look for this sub:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.your_table_nameTableAdapter.Fill(Me.your_db_nameDataSet.your_table_name)
End Sub
The line inside your Form1_Load Sub will upload the data inside your DataGridView, leave it there if you want it to load with the form or cut/paste it wherever you like.
Now you can add this the code to programmatically update the DB:
Private Sub DataGridView1_CellEndEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellEndEdit
Try
Dim location As Point = DataGridView1.CurrentCellAddress
Dim sqlCmd As String = "UPDATE table_name SET " & _
DataGridView1.Columns(location.X).Name.Replace("DataGridViewTextBoxColumn", "") & " = #Data " & _
"WHERE " & _
DataGridView1.Columns(0).Name.Replace("DataGridViewTextBoxColumn", "") & " = #ID"
Using myConn As New SqlConnection(My.Settings.VISURE_DA_PDFConnectionString)
myConn.Open()
Using myCmd As New SqlCommand(sqlCmd, myConn)
myCmd.Parameters.Add("#Data", SqlDbType.VarChar)
myCmd.Parameters.Add("#ID", SqlDbType.Int)
myCmd.Parameters("#Data").Value = DataGridView1.Rows(location.Y).Cells(location.X).Value
myCmd.Parameters("#ID").Value = DataGridView1.Rows(0).Cells(location.X).Value
myCmd.ExecuteNonQuery()
End Using
myConn.Close()
End Using
Catch ex As Exception
Err.Clear()
End Try
End Sub
Remarks:
location.X is the col index, location.Y is the row index
DataGridView1.Columns(0).Name This is my ID (primary key) and it is always in the first column. Change it with yours.
Don't forget to add .Replace("DataGridViewTextBoxColumn", "") whan you are getting your column name
As previously said, this code will update your DB every time the user edits one cell on your DataGridView updating only the edited cell. This is not a big issue because if you want to edit two ore more cell, every time you leave an edited cell the method DataGridView1_CellEndEdit is fired!