Wednesday, October 3, 2012

Add data to a gambas data grid

Data grid Codes
 This event is raised when the GridView needs the data stored in a specified cell.

    * Row is the cell row.
    * Column is the cell column.

PUBLIC SUB GridView1_Data(Row AS Integer, Column AS Integer)
GridView1.Data.Text = "Gambas " & Row & "," & Column
END

Adding new records in a Gambas data grid


' Gambas class file

PRIVATE $hConn AS NEW Connection

PRIVATE $res AS Result

'-------------------------------------------------

PUBLIC SUB Form_Open()

DIM iCount AS Integer

DIM hTable AS Table

DIM rTest AS result

DIM sql AS String


'define the gridview layout

GridView1.header = GridView.Horizontal

GridView1.grid = TRUE

GridView1.Rows.count = 0

GridView1.Columns.count = 2

GridView1.Columns[0].text = "ID"

GridView1.Columns[1].text = "Value"

GridView1.Columns[0].width = 55

GridView1.Columns[1].width = 55



WITH $hConn

    .Type = "sqlite"

    .host = User.home

    .name = ""

END WITH


'delete an existing test.sqlite

IF Exist(User.home & "/test.sqlite") THEN

    KILL User.home & "/test.sqlite"

ENDIF


'create test.sqlite

$hConn.Open

    $hConn.Databases.Add("test.sqlite")

$hconn.Close


'define the table sampleTable

$hconn.name = "test.sqlite"

$hConn.Open

    hTable = $hConn.Tables.Add("sampleTable")

    hTable.Fields.Add("s_seq", db.Integer)

    hTable.Fields.Add("s_rndm", db.Integer)

    hTable.PrimaryKey = ["s_seq"]

    hTable.Update


'fill the table with generated data

$hconn.Begin

    rTest = $hConn.Create("sampleTable")

    FOR iCount = 1 TO 10000

        rTest!s_seq = iCount

        rTest!s_rndm = Int(Rnd(0, 100))

        rTest.Update

    NEXT

$hConn.Commit


'read the database

sql = "select s_seq as ID, s_rndm as Value from sampleTable"

$res = $hconn.Exec(sql)

CATCH

$hConn.Rollback

Message.Error(DConv(Error.Text))


END

'-------------------------------------------------

PUBLIC SUB Form_Activate()

'change the rowcount of the gridview from 0 to the number of records.

'This triggers the data handling event


GridView1.Rows.Count = $res.Count

END

'-------------------------------------------------

PUBLIC SUB GridView1_Data(Row AS Integer, Column AS Integer)

    $res.moveTo(row)

    GridView1.Data.text = Str($res[GridView1.Columns[column].text])

END

'-------------------------------------------------

PUBLIC SUB Form_Close()

    $hconn.Close

END

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