ASP.NET Core Web API and Microsoft.Data.SqlClient.SqlException (0x80131904): - C#

ASP.NET Core Web API is a powerful framework for building scalable, secure and high-performance web applications. It provides a robust set of tools for developers to build web APIs that can handle large amounts of traffic and data. However, when working with databases, developers may sometimes encounter errors such as Microsoft.Data.SqlClient.SqlException (0x80131904).

What is Microsoft.Data.SqlClient.SqlException (0x80131904)?

Microsoft.Data.SqlClient.SqlException (0x80131904) is an exception that occurs when there is an error in the SQL Server database. It can be caused by a variety of factors, such as invalid syntax or incorrect permissions.

Common Causes of Microsoft.Data.SqlClient.SqlException (0x80131904)

There are various reasons why this exception may occur, including:

• Incorrect syntax in SQL queries
• Incorrect permissions on the SQL Server database
• Connection timeout issues
• Data conversion errors

Resolving Microsoft.Data.SqlClient.SqlException (0x80131904)

To resolve Microsoft.Data.SqlClient.SqlException (0x80131904), developers can follow a few steps:

1. Check the syntax of SQL queries: Ensure that the SQL queries being executed are written correctly and do not contain any syntax errors.

2. Check permissions on the SQL Server: Make sure that the user executing the SQL queries has the necessary permissions on the SQL Server database.

3. Check connection timeout settings: If the connection to the database is timing out, increase the timeout settings in the connection string.

4. Check data conversion issues: Ensure that the data being sent and received by the application is correctly formatted and converted to the correct data types.

Example Code

Here is an example of a code snippet that can help in resolving Microsoft.Data.SqlClient.SqlException (0x80131904):

try
{
    // Execute SQL Query
}
catch (SqlException ex)
{
    if (ex.Number == 18456)
    {
        // Handle login errors
    }
    else if (ex.Number == 2627 || ex.Number == 2601)
    {
        // Handle duplicate key violations
    }
    else if (ex.Number == -2)
    {
        // Handle timeout errors
    }
    else
    {
        // Handle other SQL errors
    }
}
catch (Exception ex)
{
    // Handle other exceptions
}

In this code snippet, the try-catch block is used to catch SqlException and other exceptions. Once an exception is caught, the if-else statements are used to handle specific errors based on the error number. This helps in providing better error handling and resolution.

Conclusion

Microsoft.Data.SqlClient.SqlException (0x80131904) can be a common issue when working with SQL Server databases in ASP.NET Core Web API. This guide provides some insights into the causes and possible solutions for this exception. It is important to analyze the specific error and take appropriate steps to resolve it in order to ensure a smooth and error-free application.