Creating an STD
September 14, 2006 1 Comment
In this blog entry, we will talk about STDs (strongly typed datasets, not sexually transmitted diseases). I am going to show you how to switch from DataSets to STDs in just a few steps. It is not a drag and drop demo.
First, you have some code like this (this uses sp_help to get database info):
SqlConnection conn = new SqlConnection(_connString);
SqlCommand cmd = new SqlCommand("sp_help", conn);
cmd.CommandType = CommandType.StoredProcedure;
DataSet ds = new DataSet("DatabaseInfo");
SqlDataAdapter da = new SqlDataAdapter(cmd);
SqlCommand cmd = new SqlCommand("sp_help", conn);
cmd.CommandType = CommandType.StoredProcedure;
DataSet ds = new DataSet("DatabaseInfo");
SqlDataAdapter da = new SqlDataAdapter(cmd);
try
{
conn.Open();
da.Fill(ds);
}
catch (System.Exception ex)
{
//You would normally have something here
}
finally
{
conn.Dispose();
}
Now add one line after the finally:
ds.WriteXmlSchema(
"C:\DatabaseInfo.xsd");You now add a DataSet to your project:
Now, open the XML Schema you saved. Select all and then paste into your new Dataset in your project. Then, change the following line of code from
DataSet ds = new DataSet("DatabaseInfo");
to
DataBaseInfoDS ds = new DatabaseInfoDS();
You now have switch to an STD without much effort. 
Stop Making Sense 
Great article. But what happens if you publish the app via One-Click Deployment? Does this STD get embeded into the app or does it have to be read from the disk