Byref argument type mismatch

Question

Hi Byref argument type mismatch apiUrl = "192.168.1.2:80/ISAPI/streaming/channels/01/picture" UserName = "admin" password = "12345." Call SaveImageFromAPI(apiUrl, UserName, password, txttrno.Text) -------------- Public Sub SaveImageFromAPI(apiUrl As String, UserName As String, Pwd As String, TrNo As String) Thanks

Sophia Carter · Answer

Hello! It looks like you are encountering a Byref argument type mismatch in your code snippet. This issue typically arises when the data type of the arguments passed in a procedure or function call does not match the data type expected by the receiving procedure or function. In your case, the `SaveImageFromAPI` procedure is expecting four arguments of type String: `apiUrl`, `UserName`, `Pwd`, and `TrNo`. However, when you are calling this procedure, you are passing `txttrno.Text`, which seems to be referencing a control that may not directly provide a String value. To resolve this mismatch, you can ensure that `txttrno.Text` (which is likely a control like a TextBox) is explicitly converted to a String before passing it to the `SaveImageFromAPI` procedure. You can do this by using the `Convert.ToString(txttrno.Text)` or `txttrno.Text.ToString()` methods to explicitly convert the value to a String data type. Here is an updated version of your code snippet with the conversion included: apiUrl = "192.168.1.2:80/ISAPI/streaming/channels/01/picture" UserName = "admin" password = "12345." Call SaveImageFromAPI(apiUrl, UserName, password, Convert.ToString(txttrno.Text)) By explicitly converting `txttrno.Text` to a String data type, you are ensuring that the data type matches the expected type in the `SaveImageFromAPI` procedure. I hope this helps clarify the Byref argument type mismatch issue you are facing. If you have any more questions or need further assistance, feel free to ask!