Matrix doesn't work

Question

Hi all,
i created a matrix with screenpainter, i use the previsualization button and it work(i mean i can put values manually or simply click it and it respond back), but when i run from my code in my form all item work's properly except the matrix.
what can i do?, please help...

Answer 1

Yes, if not bound to a datasource, it can't hold any values in memory.
You have 3 options depending on what exactly you are doing: Bind to a Table (DbDatasource), a userdatasource or a DataTable. This snippet from the SDK sample shows how to do the first 2, the last one is not so commonly used with matrics (usually used with grid)
public void AddDataSourceToForm() {
        // every item must be binded to a Data Source
        // prior of binding the data we must add Data sources to the form
        // Add user data sources to the "International Phone" column in the matrix
        oUserDataSource = oForm.DataSources.UserDataSources.Add( "IntPhone", SAPbouiCOM.BoDataType.dt_SHORT_TEXT, 20 );
        // Add DB data sources for the DB bound columns in the matrix
        oDBDataSource = oForm.DataSources.DBDataSources.Add( "OCRD" );
    public void BindDataToForm() {
        // getting the matrix column by the UID
        oColumn = oColumns.Item( "DSCardCode" );
        // oColumn.DataBind.SetBound(True, "", "DSCardCode")
        oColumn.DataBind.SetBound( true, "OCRD", "CardCode" );
        oColumn = oColumns.Item( "DSCardName" );
        oColumn.DataBind.SetBound( true, "OCRD", "CardName" );
        oColumn = oColumns.Item( "DSPhone" );
        oColumn.DataBind.SetBound( true, "OCRD", "Phone1" );
        // to Data Bind an item with a user Data source
        // the table name value should be an empty string
        oColumn = oColumns.Item( "DSPhoneInt" );
        oColumn.DataBind.SetBound( true, "", "IntPhone" );
    public void GetDataFromDataSource() {
        // Ready Matrix to populate data
        oMatrix.Clear();
        oMatrix.AutoResizeColumns();
        // Querying the DB Data source
        oDBDataSource.Query( null );
        // setting the user data source data
        oUserDataSource.Value = "Phone with prefix";
        oMatrix.LoadFromDataSource();
I suggest taking a look at the whole sample: C:\Program Files\SAP\SAP Business One SDK\Samples\COM UI\CSharp\06.UseMatrix