To enable and disable a field based on value in other field

To enable and disable a field based on value in other field :


class PurchTableFormExtension
{
    [FormDataSourceEventHandler(formDataSourceStr(PurchTable, PurchLine), FormDataSourceEventType::Activated)]
    public static void PurchLine_OnActivated(FormDataSource sender, FormDataSourceEventArgs e)
    {
        FormRun             formRun          = sender.formRun();
        FormDataSource      PurchTable_ds   = formRun.dataSource(formDataSourceStr(PurchTable, PurchTable)) as FormDataSource;
        PurchTable          purchTable= PurchTable_ds.cursor();

        FormStringControl    NCMRNo = formRun.design(0).controlName("NCMR_OINCMRNum_011");
        FormStringControl    NCMRDispositionCode = formRun.design(0).controlName("NCMR_OINCMRDispositionCodeId_011");
        if(NCMRNo.text() != "")
            NCMRDispositionCode.enabled(true);
        else
        {
            NCMRDispositionCode.text(" ");
            NCMRDispositionCode.enabled(false);
         
        }
    }

        /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormControlEventHandler(formControlStr(PurchTable, NCMR_OINCMRNum_011), FormControlEventType::Modified)]
    public static void NCMR_OINCMRNum_011_OnModified(FormControl sender, FormControlEventArgs e)
    {
        FormRun             formRun          = sender.formRun();
        FormDataSource      PurchTable_ds   = formRun.dataSource(formDataSourceStr(PurchTable, PurchTable)) as FormDataSource;
        PurchTable          purchTable= PurchTable_ds.cursor();
        FormDataSource      PurchLine_ds   = formRun.dataSource(formDataSourceStr(PurchTable, PurchLine)) as FormDataSource;
        PurchLine           purchline= PurchLine_ds.cursor();

        FormStringControl    NCMRNo = formRun.design(0).controlName("NCMR_OINCMRNum_011");
        FormStringControl    NCMRDispositionCode = formRun.design(0).controlName("NCMR_OINCMRDispositionCodeId_011");
        if(NCMRNo.text() != "")
            NCMRDispositionCode.enabled(true);
        else
        {
            purchline.OINCMRDispositionCodeId_011   =   "";
            NCMRDispositionCode.enabled(false);
        }
    }

    /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormControlEventHandler(formControlStr(PurchTable, NCMR_OINCMRNum_011), FormControlEventType::LostFocus)]
    public static void NCMR_OINCMRNum_011_OnLostFocus(FormControl sender, FormControlEventArgs e)
    {
        FormRun             formRun          = sender.formRun();
        FormDataSource      PurchTable_ds   = formRun.dataSource(formDataSourceStr(PurchTable, PurchTable)) as FormDataSource;
        PurchTable          purchTable= PurchTable_ds.cursor();

        FormStringControl    NCMRNo = formRun.design(0).controlName("NCMR_OINCMRNum_011");
        FormStringControl    NCMRDispositionCode = formRun.design(0).controlName("NCMR_OINCMRDispositionCodeId_011");
        if(NCMRNo.text() != "")
            NCMRDispositionCode.enabled(true);
        else
        {
            NCMRDispositionCode.text(" ");
            NCMRDispositionCode.enabled(false);
         
        }
    }
===============================================================
//Enable and Disable field "Extra Calculationday" based on Enum value for the field "CreditCheckType".

[FormControlEventHandler(formControlStr(CustParameters, FormGroupControl1_FINCustCreditCheckType), FormControlEventType::Modified)]
    public static void FormGroupControl1_FINCustCreditCheckType_OnModified(FormControl sender, FormControlEventArgs e)
    {
        FormRun             formRun          = sender.formRun();
        FormComboBoxControl    finCreditCheckType = formRun.design(0).controlName("FormGroupControl1_FINCustCreditCheckType");
        FormIntControl    extraCalculationDays = formRun.design(0).controlName("FormGroupControl1_EQNExtraCalculationDays");
     
        if(finCreditCheckType.valueStr() == enum2str(FINCustCreditCheckType::BasedonExposure))
        {
            extraCalculationDays.enabled(true);
        }
        else
        {
            extraCalculationDays.enabled(false);
        }
    }

==============================================================

    /// <summary>
    ///
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    [FormControlEventHandler(formControlStr(PurchTable, NCMR_OINCMRDispositionCodeId_011), FormControlEventType::Lookup)]
    public static void NCMR_OINCMRDispositionCodeId_011_OnLookup(FormControl sender, FormControlEventArgs e)
    {
        FormRun             formRun          = sender.formRun();
        FormStringControl    NCMRDispositionCode = formRun.design(0).controlName("NCMR_OINCMRDispositionCodeId_011");
        Query query = new Query();
        QueryBuildDataSource qbds;
        SysTableLookup sysTableLookup;
        sysTableLookup = SysTableLookup::newParameters(tableNum(OINCMRDispositionCode), sender);
        sysTableLookup.addLookupfield(fieldNum(OINCMRDispositionCode,NCMRDispositionCodeId));
        sysTableLookup.addLookupfield(fieldNum(OINCMRDispositionCode, Description));
        qbds = query.addDataSource(tableNum(OINCMRDispositionCode));
        sysTableLookup.parmQuery(query);
        sysTableLookup.performFormLookup();
    }

}