[Solved] SQL code error in C#

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Introduction

SQL code errors can be a major source of frustration for C# developers. Fortunately, there are a few steps that can be taken to help identify and resolve these errors. This article will provide an overview of the most common SQL code errors in C# and provide some tips on how to troubleshoot and fix them. We will also discuss some of the best practices for writing SQL code in C# and how to avoid common mistakes. By the end of this article, you should have a better understanding of how to identify and resolve SQL code errors in C#.

Solution

//Create a SQL command object
SqlCommand cmd = new SqlCommand();

//Set the command type to stored procedure
cmd.CommandType = CommandType.StoredProcedure;

//Set the command text to the stored procedure name
cmd.CommandText = “sp_MyStoredProcedure”;

//Add parameters to the command
cmd.Parameters.Add(“@param1”, SqlDbType.Int).Value = 1;
cmd.Parameters.Add(“@param2”, SqlDbType.VarChar).Value = “MyValue”;

//Execute the command
cmd.ExecuteNonQuery();


The SQL statement is not the problem (you are able to execute it in SQL manager) and neither is it the call to AddWithValue because that won’t throw an ArgumentException based on the cause in mentioned in the exception message. So it must be something else. That leaves a constant and an expression using the string "ID"as the argument for the parameter ColumnName

tblListing.Rows[0]["ID"]

The documentation for the index has the following documentation for when it will throw an ArgumentException

The column specified by columnName cannot be found.

So your error is in that expression. The DataTable tblListing has no column named “ID”

solved SQL code error in C#


Solved: SQL Code Error in C# Code

If you are a C# programmer and you are getting an SQL code error, it can be a frustrating experience. Fortunately, there are a few steps you can take to troubleshoot and solve the issue. In this article, we will discuss the most common causes of SQL code errors in C# and how to fix them.

Common Causes of SQL Code Errors in C#

The most common causes of SQL code errors in C# are incorrect syntax, incorrect data types, and incorrect table or column names. Let’s take a look at each of these in more detail.

Incorrect Syntax

Incorrect syntax is one of the most common causes of SQL code errors in C#. This can happen when you are writing a query and you make a mistake in the syntax. For example, you might forget to include a comma between two columns or you might forget to include a closing parenthesis. To fix this, you should double-check your syntax and make sure it is correct.

Incorrect Data Types

Another common cause of SQL code errors in C# is incorrect data types. This can happen when you are trying to insert data into a table and the data type of the column does not match the data type of the value you are trying to insert. For example, if you are trying to insert a string into an integer column, you will get an error. To fix this, you should make sure that the data type of the column matches the data type of the value you are trying to insert.

Incorrect Table or Column Names

Finally, incorrect table or column names can also cause SQL code errors in C#. This can happen when you are trying to reference a table or column that does not exist. To fix this, you should double-check the table and column names and make sure they are correct.

Conclusion

SQL code errors in C# can be frustrating, but they can usually be solved by double-checking your syntax, data types, and table or column names. If you follow these steps, you should be able to solve the issue and get your code running smoothly.