[RESOLVED] Input string was not in a correct format

[BrailleSchool]

I am getting a FormatException error.

Input string was not in a correct format

The error is coming up on the following line. The MaskedTextBox only allows numbers.

.Parameters.Add("@StoreNumber", SqlDbType.Int).Value = Int32.Parse(SearchStoreNumber.Text.Trim)

The code is as follows:

                    If Not SearchStoreNumber.Enabled = False Then
                        If Not SearchStoreNumber.Text <> vbNullString Then
                            .Parameters.Add("@StoreNumber", SqlDbType.Int).Value = Int32.Parse(SearchStoreNumber.Text.Trim)
                        Else
                            .Parameters.Add("@StoreNumber", SqlDbType.Int).Value = DBNull.Value
                        End If
                    Else
                        .Parameters.Add("@StoreNumber", SqlDbType.Int).Value = DBNull.Value
                    End If

The parameter in the PROC is INT and the MSSQL column is also an INT.
I am not sure what to do. I have tried so many things without success.
This field is an optional field, but I do not get the error if the MaskedTextBox is not empty.
If I select only the Date to/from with the store number blank, it should show entries within that date range, but the error always goes to the store number code as the issue.