In datagridview it takes time to load data

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i have data grid and my database is in ms access i tried to load data in vb.net data grid view but it takes long time to load data. what to do ? i have AllowUesertoAddrow property of datagridview false. and adding rows in code.

What I have tried:

Dim sql = ("SELECT * FROM TotalInput")
        maxrow = get_maxrow(sql)

        Dim i As Integer
        i = dt.Rows.Count - 1
        DgTotalInput.Rows.Add(1)
        For i = 1 To i - 1
            DgTotalInput.Rows.Add(1)
        Next
        For i = 0 To dt.Rows.Count - 1
            With dt.Rows(i)
                DgTotalInput.Rows(i).Cells(0).Value = .Item("ID")
                DgTotalInput.Rows(i).Cells(2).Value = .Item("TInputDate")
                DgTotalInput.Rows(i).Cells(3).Value = .Item("TICredited")
                DgTotalInput.Rows(i).Cells(4).Value = .Item("TIAmount")
                DgTotalInput.Rows(i).Cells(5).Value = .Item("TIMode")
                DgTotalInput.Rows(i).Cells(6).Value = .Item("TIDate")
                DgTotalInput.Rows(i).Cells(7).Value = .Item("TIDebited")
                DgTotalInput.Rows(i).Cells(8).Value = .Item("TInputMode")
                DgTotalInput.Rows(i).Cells(9).Value = .Item("TITotal")
                DgTotalInput.Rows(i).Cells(10).Value = .Item("TIRemark")
            End With
        Next i

Posted 11-Aug-20 17:20pm

prafulla1978

Updated 11-Aug-20 19:52pm

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Sandeep Mewara · Answer 1 · 2020-08-11T19:49:00

You don't need to load the grid with data at runtime row-by-row.

You can get the data from database, fill it in adapter and then assign the datasource of grid. Believe that should be faster for you.
Example:

VB

Private Sub GetData(ByVal selectCommand As String)
    Try
        ' Specify a connection string.  
        ' Replace <SQL Server> with the SQL Server for your Northwind sample database.
        ' Replace "Integrated Security=True" with user login information if necessary.
        Dim connectionString As String =
            "Data Source=<SQL Server>;Initial Catalog=Northwind;" +
            "Integrated Security=True;"

        ' Create a new data adapter based on the specified query.
        dataAdapter = New SqlDataAdapter(selectCommand, connectionString)

        ' Create a command builder to generate SQL update, insert, and
        ' delete commands based on selectCommand. 
        Dim commandBuilder As New SqlCommandBuilder(dataAdapter)

        ' Populate a new data table and bind it to the BindingSource.
        Dim table As New DataTable With {
            .Locale = Globalization.CultureInfo.InvariantCulture
        }
        dataAdapter.Fill(table)
        bindingSource1.DataSource = table

        ' Resize the DataGridView columns to fit the newly loaded content.
        dataGridView1.AutoResizeColumns(
            DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader)

    Catch ex As SqlException
        MessageBox.Show("To run this example, replace the value of the " +
            "connectionString variable with a connection string that is " +
            "valid for your system.")
    End Try
End Sub

Reference: Bind data to DataGridView Control - Windows Forms | Microsoft Docs[^]

OriginalGriff · Answer 2 · 2020-08-11T19:52:00

Solution 2

Or ... just use the DataTable you already have:

VB

DgTotalInputDataSource = dt;

But ... if it's taking a really long time, it's also likely that you have far too much data. You should never show more than around 100 to 200 rows to a user: If you have more it becomes increasingly hard to find the data they are interested in. Instead, page the data, provide filters and searches, make the user's life easier.

Posted 11-Aug-20 19:52pm

OriginalGriff

Updated 11-Aug-20 19:54pm

v2

Comments

prafulla1978 12-Aug-20 5:00am

This is not succesfull beacouse after adding filter it not saves new row data/ insert new row data in database

prafulla1978 20-Sep-20 11:18am

how to call getdata method on button click