 | Here are the steps to using ADO.NET 2.0 to connect to SQL Server, from ASP.NET Web Forms or Windows Forms:
0) Use the System.Data.SqlClient namespace in your application. (Or preface each object with System.Data.SqlClient)
1) SqlConnection - Build a connectionString to create a SqlConnection object. Setup the SQL Server database with Integrated security to save on hassles. (Beginners can create a SqlDataSource or SqlDataAdapter to encapsulate steps 1-3, with lots of help from Visual Studio 2005.)
2) SqlCommand - Run SQL query or a stored procedure statement. Try the query in SQL Management Studio.
3) DataTable - Fill your object with data using DataTable.Load() with SqlCommand.ExecuteReader().
2-3b) An alternative to DataTable is the DataSet, for working with multiple related DataTables. DataSet needs a SqlDataAdapter to load data. (Another option is a DataReader, faster but less flexible. The old ADO called it RecordSets.)
4) Start using the DataTable contents. You can bind it to a DataGrid using the DataSource property, or load a single Row to a TextBox. You're ready!
[Sample Code]
//1
string dbString = "Data Source=localhost\\sqlexpress;Initial Catalog=pubs;Integrated Security=True";
SqlClient.SqlConnection sqlconnection = new SqlClient.SqlConnection(dbString);
sqlconnection.Open();
//2
SqlCommand sqlcommand = new SqlCommand("select * from Client");
sqlcommand.Connection = sqlconnection;
//3b
DataTable dt = new DataTable();
dt.Load(sqlcommand.ExecuteReader());
//3b
SqlDataAdapter dadapter = new SqlDataAdapter();
dadapter.SelectCommand = new SqlCommand(("select * from Client", sqlconnection);
DataSet dset = new DataSet(); // can use DataTable too
dadapter.Fill(dset);
//4
GridView1.DataSource = dset;
GridView1.DataBind();
sqlconnection.Close(); | | | |
| Answered by: sherwin - 52 Months Ago. |
| 6 Comments |
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| |
 | Here's a quick example on how to populate a GridView using a SqlDataSource in ASP.NET
<asp:GridView CellPadding=4 PageSize=35 HorizontalAlign=Justify ID="GridView1"
runat="server" AllowPaging="True" AllowSorting="True"
AutoGenerateColumns="False" DataSourceID="SqlDataSource1">
<Columns>
<asp:HyperLinkField DataTextField="LastName" HeaderText="Last Name"
SortExpression="pop" DataNavigateUrlFields="LastName"
DataNavigateUrlFormatString="Account.aspx?cid={0}" />
</Columns>
<PagerSettings Mode="NumericFirstLast" PageButtonCount="20" />
<PagerStyle HorizontalAlign="Center" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
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