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David OvellaDavid Ovella 

The error is not showing in my visualforce page

in my standar page my error is showing
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but in my visualforce page when I try to save it is not showing
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my apex 
public class FacturaRapidaController {
    
    public Factura__c factura;
    public Cobro__c cobro;
 
    public Factura__c getFactura(){
        if(factura==null)factura=new Factura__c();
        factura.Esta_seguro__c='Si';
        return factura;
    }

    
    Public PageReference cancelarFactura(){  

    }
    
    public PageReference guardarFactura(){               	
        try{ 
        	insert factura; 
        }
        catch(exception ex) {       
            return null; 
        }

        PageReference FacturaRapidaPage = new ApexPages.StandardController(factura).view();
        FacturaRapidaPage.setRedirect(true);
        return FacturaRapidaPage;
    }     
}
my visualforce face 
<apex:page controller="FacturaRapidaController" tabStyle="Factura__c">  
    <script>     
    function confirmarCancelar() {           
        var isCancel = confirm("Estas seguro que desea cancelar la creación de Factura?");        
        if (isCancel)return true;    
        return false;
    }
  </script>    
    <apex:sectionHeader title="Creación de" subtitle="FACTURA"/>
    <apex:form >                     
            <apex:pageBlock mode="edit" title="Crear Factura Contado"> 
                <apex:pageBlockButtons >               
                    <apex:commandButton action="{!guardarFactura}" value="Guardar"/>                
                    <apex:commandButton action="{!cancelarFactura}" value="Cancelar" onclick="return confirmarCancelar()" immediate="true"/>       
                </apex:pageBlockButtons>     
                <apex:pageBlockSection title="Información Básica de la Factura" columns="1">                         
                    <apex:inputField value="{!factura.Pre_Factura__c}"/>  
                    <apex:inputField value="{!factura.Sucursal__c}" required="true"/>
                    <apex:inputField value="{!factura.Caja__c}" required="true"/>        
                    <apex:inputField value="{!factura.Serie__c}" required="true"/> 
                </apex:pageBlockSection>   
         <apex:messages >
                <apex:pageBlockSection title="Confirmar Factura" columns="1">
                    <apex:inputField value="{!factura.Pre_impreso_001_001__c}"/>                                               
                    <apex:inputField value="{!factura.Pre_impreso_002_001__c}"/>                           
                    <apex:inputField value="{!factura.Pre_impreso_002_002__c}"/>  
                    <apex:inputField value="{!factura.Pre_impreso_003_001__c}"/>                      
                    <apex:inputField value="{!factura.Esta_seguro__c}" required="true"/>
                </apex:pageBlockSection>           
         </apex:messages>         
            </apex:pageBlock>
        
    </apex:form>
</apex:page>





 
Best Answer chosen by David Ovella
Amit Chaudhary 8Amit Chaudhary 8
you can try <apex:pagemessages /> to show error msg on page
please check below post for same.
1) http://www.sfdcpoint.com/salesforce/show-error-message-visualforce-page/
2) http://www.infallibletechie.com/2012/10/how-to-display-error-messages-in.html
3) http://www.infallibletechie.com/2013/04/how-to-add-error-message-in-visualforce.html

Please change your class like below:-
  
public class FacturaRapidaController {
    
    public Factura__c factura;
    public Cobro__c cobro;
 
    public Factura__c getFactura(){
        if(factura==null)factura=new Factura__c();
        factura.Esta_seguro__c='Si';
        return factura;
    }

    
    Public PageReference cancelarFactura(){  

    }
    
    public PageReference guardarFactura(){               	
        try{ 
        	insert factura; 
        }
        catch(exception ex) {       
			ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,ex.getMessage() ));
			return null; 
        }

        PageReference FacturaRapidaPage = new ApexPages.StandardController(factura).view();
        FacturaRapidaPage.setRedirect(true);
        return FacturaRapidaPage;
    }     
}
and page like below :- 
<apex:page controller="FacturaRapidaController" tabStyle="Factura__c">  
    <script>     
    function confirmarCancelar() {           
        var isCancel = confirm("Estas seguro que desea cancelar la creación de Factura?");        
        if (isCancel)return true;    
        return false;
    }
  </script>    
    <apex:sectionHeader title="Creación de" subtitle="FACTURA"/>
    <apex:form >                     
            <apex:pageBlock mode="edit" title="Crear Factura Contado"> 
				<apex:pagemessages />
                <apex:pageBlockButtons >               
                    <apex:commandButton action="{!guardarFactura}" value="Guardar"/>                
                    <apex:commandButton action="{!cancelarFactura}" value="Cancelar" onclick="return confirmarCancelar()" immediate="true"/>       
                </apex:pageBlockButtons>     
                <apex:pageBlockSection title="Información Básica de la Factura" columns="1">                         
                    <apex:inputField value="{!factura.Pre_Factura__c}"/>  
                    <apex:inputField value="{!factura.Sucursal__c}" required="true"/>
                    <apex:inputField value="{!factura.Caja__c}" required="true"/>        
                    <apex:inputField value="{!factura.Serie__c}" required="true"/> 
                </apex:pageBlockSection>   
         <apex:messages >
                <apex:pageBlockSection title="Confirmar Factura" columns="1">
                    <apex:inputField value="{!factura.Pre_impreso_001_001__c}"/>                                               
                    <apex:inputField value="{!factura.Pre_impreso_002_001__c}"/>                           
                    <apex:inputField value="{!factura.Pre_impreso_002_002__c}"/>  
                    <apex:inputField value="{!factura.Pre_impreso_003_001__c}"/>                      
                    <apex:inputField value="{!factura.Esta_seguro__c}" required="true"/>
                </apex:pageBlockSection>           
         </apex:messages>         
            </apex:pageBlock>
        
    </apex:form>
</apex:page>


Please let us know if this will help you
 

All Answers

sharathchandra thukkanisharathchandra thukkani
please follow belo link this should help you:

https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode/apex_class_Datacloud_DuplicateResult.htm
Amit Chaudhary 8Amit Chaudhary 8
you can try <apex:pagemessages /> to show error msg on page
please check below post for same.
1) http://www.sfdcpoint.com/salesforce/show-error-message-visualforce-page/
2) http://www.infallibletechie.com/2012/10/how-to-display-error-messages-in.html
3) http://www.infallibletechie.com/2013/04/how-to-add-error-message-in-visualforce.html

Please change your class like below:-
  
public class FacturaRapidaController {
    
    public Factura__c factura;
    public Cobro__c cobro;
 
    public Factura__c getFactura(){
        if(factura==null)factura=new Factura__c();
        factura.Esta_seguro__c='Si';
        return factura;
    }

    
    Public PageReference cancelarFactura(){  

    }
    
    public PageReference guardarFactura(){               	
        try{ 
        	insert factura; 
        }
        catch(exception ex) {       
			ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,ex.getMessage() ));
			return null; 
        }

        PageReference FacturaRapidaPage = new ApexPages.StandardController(factura).view();
        FacturaRapidaPage.setRedirect(true);
        return FacturaRapidaPage;
    }     
}
and page like below :- 
<apex:page controller="FacturaRapidaController" tabStyle="Factura__c">  
    <script>     
    function confirmarCancelar() {           
        var isCancel = confirm("Estas seguro que desea cancelar la creación de Factura?");        
        if (isCancel)return true;    
        return false;
    }
  </script>    
    <apex:sectionHeader title="Creación de" subtitle="FACTURA"/>
    <apex:form >                     
            <apex:pageBlock mode="edit" title="Crear Factura Contado"> 
				<apex:pagemessages />
                <apex:pageBlockButtons >               
                    <apex:commandButton action="{!guardarFactura}" value="Guardar"/>                
                    <apex:commandButton action="{!cancelarFactura}" value="Cancelar" onclick="return confirmarCancelar()" immediate="true"/>       
                </apex:pageBlockButtons>     
                <apex:pageBlockSection title="Información Básica de la Factura" columns="1">                         
                    <apex:inputField value="{!factura.Pre_Factura__c}"/>  
                    <apex:inputField value="{!factura.Sucursal__c}" required="true"/>
                    <apex:inputField value="{!factura.Caja__c}" required="true"/>        
                    <apex:inputField value="{!factura.Serie__c}" required="true"/> 
                </apex:pageBlockSection>   
         <apex:messages >
                <apex:pageBlockSection title="Confirmar Factura" columns="1">
                    <apex:inputField value="{!factura.Pre_impreso_001_001__c}"/>                                               
                    <apex:inputField value="{!factura.Pre_impreso_002_001__c}"/>                           
                    <apex:inputField value="{!factura.Pre_impreso_002_002__c}"/>  
                    <apex:inputField value="{!factura.Pre_impreso_003_001__c}"/>                      
                    <apex:inputField value="{!factura.Esta_seguro__c}" required="true"/>
                </apex:pageBlockSection>           
         </apex:messages>         
            </apex:pageBlock>
        
    </apex:form>
</apex:page>


Please let us know if this will help you
 
This was selected as the best answer
William TranWilliam Tran
Add the <apex:messages /> line below in your VF Page then you should be good to go:

<apex:page controller="FacturaRapidaController" tabStyle="Factura__c"> 
<apex:messages />

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But you can give every answer a thumb up if that answer is helpful to you. 

Thanks