获取数据库架构信息，GetSchema（），参数表

private DataTable GetSqlDatabaseSchema(string strConn, string collectionName,string[] strs)
{
SqlConnection connection = new SqlConnection(strConn);
DataTable schema = new DataTable();
try
{
connection.Open();
if (!string.IsNullOrEmpty(collectionName))
{
if (strs != null&&strs.Length >0)
{
schema = connection.GetSchema(collectionName, strs);
}
else
schema = connection.GetSchema(collectionName);
}
else
schema = connection.GetSchema();
}
catch
{
schema = null;
}
finally
{
connection.Close();
}
return schema;
}