How to get RadBinaryImage DataValue

[sabarishbabu]

Hi,

In UI,
I have 
   1. RadBinary image control to show Image from database
   2. Button control to save Image


I have two events
         1. Page_load()
         2. btnSave_Click()

In Page_Load()
         1. I'm getting Byte value from database and assigning it to RadBinaryImage.DataValue
In btnSave_Click
        1. I'm getting DataValue from RadBinaryImage control (assigned during page_load event)
         2. Save it into database
        3. But DataValue is null while retrieving from RadBinaryImage.


Code:
Page_Load
{
     if(!PostBack)
    {
        //Passing resoruceId and get resource object which contains Image value
         eFMResource resource = oAdminBase.GetResource(eResource.ResourceId);
        radBinaryImage.DataValue= resource.ImageValue;
    }
}

btnSave_Click
{
     eFMResource resource = new eFMResource ();
    //Getting DataValue from radBinaryImage and assign it to the object to save into db.
     resource.ImageValue = radBinaryImage.DataValue;
     oAdminBase.SaveResource(resource);
}


Thanks,
Sabarish.

[Georgi Krustev]

Hello Sabarishbabu,

The DataValue is a property which specifies the source field from which the data will be passed as a byte array. This value is used only when the control is bound. After that the value is deleted and there is no way how you can retrieve it. You will need to get it from data base in order to use it for other purposes.

Best regards,
Georgi Krustev
the Telerik team

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[Sérgio]

This is a workaround, saving an acess to database.
(it also can be very useful if this radBinaryImage is changeable by an upload control)


ASPX (add a hiddenfield):
<asp:HiddenField ID="hf_ImageString64Bytes" runat="server" Visible="false" />


Page_Load
{
     if(!PostBack)
    {
        //Passing resoruceId and get resource object which contains Image value 
         eFMResource resource = oAdminBase.GetResource(eResource.ResourceId);
        radBinaryImage.DataValue= resource.ImageValue;
        //// NEW CODE - Save the foto bytes at the hiddenfield
hf_ImageString64Bytes.Value = Convert.ToBase64String(resource.ImageValue);
    }
}

btnSave_Click
{
     eFMResource resource = new eFMResource ();
    //Getting DataValue from radBinaryImage and assign it to the object to save into db.
    //// OLD CODE
    // resource.ImageValue = radBinaryImage.DataValue;
    //// NEW CODE
    resource.ImageValue = Convert.FromBase64String(hf_ImageString64Bytes.Value);
     oAdminBase.SaveResource(resource);
}

[Navin]

But there should be a method which can return the current bytes of image on the control.

[Andrey]

Hi,

As my colleague Georgi said, you need to access the database field in order to get the binding data of the RadBinaryImage control. Current implementation of RadBInaryImage does not provide support for accessing its binding data.

All the best,
Andrey
the Telerik team