asp.net - Assigning variables in SQL Query c#

Question

How do i assign variable cats so that it pulls the rows in database which we specify in cat variable ? I did query like below but doesn't work. Thanks

var cats = "white";
var selectCommand = "SELECT TOP(10) * FROM mytable WHERE parent = @cats";

Answer 1

也许你期待这样的事情

var selectCommand = "SELECT TOP(10) * FROM mytable WHERE parent = @cats";
var cmd= new SqlCommand(selectCommand, yourconnetion);

cmd.Parameters["@cats"].Value = "white";

或者

cmd.Parameters.AddWithValue("@cats","white");