Update a table data in backendless server from vb.net

General
1

I have created an application and in it there is a table named “Test”. I can insert the data into that table from vb,net using ““Backendless.Data.Of.Save()”” .

Now I need to update a data which I already saved in the table from vb.net.
There is a unique field named "Test_ID’. I am also getting a duplicate entry msg while using the same data in the test_Id field in save
Please help me out…

2

You should put a proper “objectId” field into the object to perform update instead of create operation.

3

Thanks, Its working when I put the copied object ID directly. But How can we load objectID from database by programmatically in c#

4

My code is like this:

Backendless.InitApp(“myAppID”, “mySecretKey”, “v1”);
Dictionary<string, object> contact = new Dictionary<string, object>();
contact[“test_ID”] = “123”;
contact[“test_Name”] = “Jack”;
contact[“objectId”] = “7A4BAD31-9A39-0B92-FF74-CE2D5589E800”; // this is the object ID I copied from backendless console
try
{
Backendless.Data.Of(“tbl_Test”).Save(contact);
MessageBox.Show(“Saved”);

        }
        catch(BackendlessException exception)
        {
            MessageBox.Show(exception.Detail);
        }

My requirement is to call the object ID from server in the bolden line. Please suggest me how it is to be done…

5

Save(contact) call should return a saved object with objectId.
So I suppose you can do the following:

contact = Backendless.Data.Of("tbl_Test").Save(contact);

and after that you’ll have objectId initialized in that “contact” object