string GetColumnDefinition(Column column)
{
var sb = new StringBuilder();
sb.Append("\r\n\t");
sb.AppendFormat("[{0}] {1}", column.Name, GetDatabaseType(column));
if(!column.Nullable)
sb.Append(" NOT");
sb.Append(" NULL");
if(column.PrimaryKey)
sb.Append(" PRIMARY KEY");
if (column.Identity)
sb.Append(" IDENTITY(1,1)");
if (column.Unique)
sb.Append(" UNIQUE");
if (column.Default != null)
sb.AppendFormat(" DEFAULT {0}", column.Default);
return sb.ToString();
}
string GetDatabaseType(Column column)
{
switch (column.Type)
{
case DbType.Int16:
return "tinyint";
case DbType.Int32:
return "int";
case DbType.Int64:
return "bigint";
case DbType.Boolean:
return "bit";
case DbType.StringFixedLength:
return string.Format("nchar({0})", column.Length);
case DbType.String:
if (column.Length < 4000)
return string.Format("nvarchar({0})", column.Length);
return "text";
case DbType.DateTime:
return string.Format("datetime");
case DbType.Double:
return string.Format("float");
case DbType.Decimal:
return string.Format("decimal({0}, {1})", column.Precision, column.Scale);
case DbType.Guid:
return "uniqueidentifier";
case DbType.Currency:
return "money";
case DbType.Xml:
return "xml";
case DbType.Binary:
return string.Format("varbinary({0})",
column.Length <= 8000 ? column.Length.ToString() : "max");
default:
throw new ArgumentOutOfRangeException("Don't know how to handle DbType: " + column.Type);
}
}
