Comments by Faisal_Raj

Faisal_Raj 14-Jun-22 7:20am View

"InvalidOperationException: The instance of entity type 'imageModels' cannot be tracked because another instance with the same key value for {'ImgID'} is already being tracked. When attaching existing entities, ensure that only one entity instance with a given key value is attached. Consider using 'DbContextOptionsBuilder.EnableSensitiveDataLogging' to see the conflicting key values." -

Here is the confusion. Updating all fields no issues but updating individually name field having this issue.
If I try to update name filed only without uploading any file the function will not go into if condition but showing this error.

Faisal_Raj 14-Jun-22 7:12am View

"_context.Update(imgModels);" - this following line showing the error while trying to update name filed only.

Faisal_Raj 16-Oct-19 9:51am View

I'm sorry. I'm very new in this field, unable to understand your idea. But in this system I have to store and update user status "0" or "1" in database each time. I have no idea that how can I use your concept in this case

Faisal_Raj 16-Oct-19 9:36am View

How can I send the value user status "0" ?

Faisal_Raj 16-Oct-19 9:14am View

How to set timestamp , please give me some example code

Faisal_Raj 16-Oct-19 8:58am View

Please give me example code , so i can follow that .

Faisal_Raj 10-Aug-19 22:19pm View

Can you please give me example that how can i do that ?

Faisal_Raj 8-Aug-19 8:57am View

In that case what will be code from client site i mean in aspx ?

Faisal_Raj 8-Aug-19 5:54am View

From web page i would like to on off a light using arduino. Can you help me ?

Faisal_Raj 8-Aug-19 5:09am View

I'm not sure but maybe with jquery ajax it is possible.

Faisal_Raj 8-Aug-19 4:13am View

There is usb port in server and i connect arduino with usb port of server. That port could be "COM3" or "COM4".

Faisal_Raj 7-Aug-19 22:27pm View

Serial port is connected with arduino. When i press the button from web application it pass the value to arduino.

Faisal_Raj 7-Aug-19 22:26pm View

Yes , thanks for your appreciation. Color is different part, that one i just tried to test how script works. In my code up there you may find that there is a port specified for arduino. When button "BlueOn" is pressed it pass value "2" and when again press it send value "1" to the port, so light will on and off following command. Now i want to implement this within single click. This means that i'm trying to do something like when i press the button it will pass the value "1" to arduino so light will be on and when i release the button it will pass "2" to arduino so light will off.

Faisal_Raj 7-Aug-19 9:19am View

As you can see from my code up there, when i press the button "BlueOn" it send the value "1" or "2" to the arduino port "ardo.PortName = "COM5";". For these 2 value i need to press the button 2 times. Now i'm trying to do something like when i press and hold the button it will pass the value "1" and when i release the button it will pass "2".

Faisal_Raj 7-Aug-19 8:55am View

Please check my code up there."ardo = new SerialPort();
ardo.PortName = "COM5";
ardo.BaudRate = 9600;"
I have to pass the value "1" or "2" to this "ardo" port by "ardo.Write(Session["currentState"].ToString());" .
How can i do this when using script ?

Faisal_Raj 7-Aug-19 7:10am View

I understand that. When i am pressing and releasing button color is changing. But i'm confused how i can pass this value to serial port. Please help me to fix this issue.

Faisal_Raj 7-Aug-19 7:10am View

I understand that. When i am pressing and releasing button color is changing. But i'm confused how i can pass this value to serial port. Please help me to fix this issue.

Faisal_Raj 7-Aug-19 5:35am View

How can i pass string value by script as like code behind button ?

Faisal_Raj 7-Aug-19 3:00am View

Kindly help me on this matter

Faisal_Raj 7-Aug-19 2:16am View

Can you please give me example code, so i can follow that ...

Comments by Faisal_Raj (Top 20 by date)