Question

I need to insert multiple rows in my Mysql database.my rows are available in my dataset.

i am using for loop to send the row one by one is that right way?…

Answer 1

You can insert multiple rows using a single SQL statement like so:

INSERT INTO myTable (col1, col2, col3) VALUES ('myval1', 'myval2', 'myval3'), ('myotherval1', 'myotherval2', 'myotherval3'), ('anotherval1', 'anotherval2', 'anotherval3');

Update:

MarkR is right in his comment – if you’re collecting data from a user, or you’re compiling information, you can build the query dynamically with something like:

StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("INSERT INTO myTable (col1, col2, col3) VALUES ");
for(int i=0;i<myDataCollection.Count;i++) {
  stringBuilder.Append("(" + myDataCollection[i].Col1 + ", " + myDataCollection[i].Col2 + ", " + myDataCollection[i].Col3 + ")");
  if (i<myDataCollection.Count-1) {
    stringBuilder.Append(", ");
  } else {
    stringBuilder.Append(";");
  }
}

string insertStatement = stringBuilder.ToString();

Two important points to note:

1. If you are accepting input from a user, it is very important to sanitize all user inputs, otherwise malicious users could modify/delete/drop your entire database. For more info, google “SQL Injections.”
2. I’m using the StringBuilder class, rather than using a string primitive and simply appending (ie. string s = “Insert…”; s+=”blah blah blah”) because it’s StringBuilder is faster at appending, because it is not treated as an array, and so does not need to resize itself as you append to it.