how to create a generic parameterized query in C# sqlserver

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I have a generic insert method that insert to many kind of tables, this is the method:

C#

using (SqlConnection connection = new SqlConnection(connectionString))
{
   connection.Open();
   SqlCommand command =
   new SqlCommand(
      "INSERT INTO [" +tableName+ "] (" +columns+ ") OUTPUT INSERTED.ID VALUES (" +data+ ");",
      connection);
   return (int)command.ExecuteScalar();
}

How can i convert it to parameter query?

Posted 19-May-14 0:17am

Member 9415646

Updated 19-May-14 0:27am

Nelek

v3

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DamithSL 19-May-14 6:29am

how you build columns?

Rob Philpott 19-May-14 6:31am

What would be the point of turning into a stored procedure?

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DamithSL · Answer 1 · 2014-05-19T00:44:00

C#

List<string> columns  = new List<string>() {"Col1", "Col2"};
List<object> data  = new List<object>() {1, DateTime.Now};
var tableName ="Table1";

// above data will pass to the method 
// we can buld the column names as below
var strCol = string.Join(",",columns);
// and set of parameter names like below 
var strParam = string.Join(",", columns.Select(r => "@" + r));
//now we can build the full insert statement 
var sql = "INSERT INTO [" +tableName+ "] (" +strCol+ ") VALUES (" +strParam+ ")";

using (SqlConnection connection = new SqlConnection(connectionString))
{
	connection.Open();
	SqlCommand command = new SqlCommand(sql , connection);
	//adding each parameter with name and value 
	for (int i = 0; i < strParam.Length; i++)
	{
	   cmd.Parameters.AddWithValue(strParam[i], data[i]);
	}
   return (int)command.ExecuteScalar();
}</string></string>