how to diveide string and set in to the table

public static class StringExtensions
{
	public static IEnumerable<string> SplitInGroups(this String str, int chunkSize)
	{
		if (null == str)
			throw new ArgumentNullException("str", "String can't be null.");
			
		if (chunkSize <= 0)
			throw new ArgumentException("Chunk size must be positive.", "chunkSize");
			
		for (var i = 0; i < str.Length; i += chunkSize)
			yield return str.Substring(i, Math.Min(chunkSize, str.Length - i));
	}
}
</string>

string yourString ="Some string...";

var stringGroups = yourString.SplitInGroups(150);
foreach(string stringGroup in stringGroups)
{
	// Do something with stringGroup...
}