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SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
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Thank you SuperCoder
Let's dive into your issue with the code.
The error you're encountering when running the provided code could be due to several reasons. Here are some common issues and solutions:
Parameter Declaration: Ensure that all parameters used in the CommandText are properly declared and added to the Command1.Parameters collection. In your code, you have added parameters for @trn_date1 to @trn_date20 and @ntrn_date1 to @ntrn_date20, but make sure they match exactly with the placeholders in the SQL command.
Null Values Handling: The use of If(CObj(datTrn_Date1.EditValue), DBNull.Value) is correct for handling null values. However, ensure that datTrn_Date1.EditValue and similar variables are properly initialized and not causing any runtime errors.
SQL Command Syntax: Verify that the SQL command syntax is correct. Ensure there are no missing commas, spaces, or other syntax errors in the CommandText.
Account_No Variable: Ensure that the Account_No variable is properly defined and holds a valid value. If Account_No is not properly initialized, it could cause an error.
Database Connection: Ensure that the database connection is open and valid before executing the command. If the connection is closed or invalid, it will result in an error.
Here is a revised version of your code with some additional checks:
'Ensure the database connection is open
If Command1.Connection.State = ConnectionState.Closed Then
Command1.Connection.Open()
End If
'Define the SQL command
Command1.CommandText = "UPDATE names2 SET " &
"trn_date1 = @trn_date1, trn_date2 = @trn_date2, trn_date3 = @trn_date3, trn_date4 = @trn_date4, " &
"trn_date5 = @trn_date5, trn_date6 = @trn_date6, trn_date7 = @trn_date7, trn_date8 = @trn_date8, " &
"trn_date9 = @trn_date9, trn_date10 = @trn_date10, trn_date11 = @trn_date11, trn_date12 = @trn_date12, " &
"trn_date13 = @trn_date13, trn_date14 = @trn_date14, trn_date15 = @trn_date15, trn_date16 = @trn_date16, " &
"trn_date17 = @trn_date17, trn_date18 = @trn_date18, trn_date19 = @trn_date19, trn_date20 = @trn_date20, " &
"ntrn_date1 = @ntrn_date1, ntrn_date2 = @ntrn_date2, ntrn_date3 = @ntrn_date3, ntrn_date4 = @ntrn_date4, " &
"ntrn_date5 = @ntrn_date5, ntrn_date6 = @ntrn_date6, ntrn_date7 = @ntrn_date7, ntrn_date8 = @ntrn_date8, " &
"ntrn_date9 = @ntrn_date9, ntrn_date10 = @ntrn_date10, ntrn_date11 = @ntrn_date11, ntrn_date12 = @ntrn_date12, " &
"ntrn_date13 = @ntrn_date13, ntrn_date14 = @ntrn_date14, ntrn_date15 = @ntrn_date15, ntrn_date16 = @ntrn_date16, " &
"ntrn_date17 = @ntrn_date17, ntrn_date18 = @ntrn_date18, ntrn_date19 = @ntrn_date19, ntrn_date20 = @ntrn_date20 " &
"WHERE account_no = @Account_No"
'Add parameters
Command1.Parameters.AddWithValue("@trn_date1", If(CObj(datTrn_Date1.EditValue), DBNull.Value))
'Repeat for all other parameters...
'Add Account_No parameter
Command1.Parameters.AddWithValue("@Account_No", Account_No)
'Execute the command
Command1.ExecuteNonQuery()
If you still encounter issues, please provide more details about the specific error message you're receiving. This will help in diagnosing the problem more accurately.
Feel free to ask if you have any more questions or need further assistance!
Joanthan