📄 simple-dataset-oledb.aspx
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<%@Page Language="C#"%>
<%@Import Namespace="System.Data"%>
<%@Import Namespace="System.Data.Common"%>
<%@Import Namespace="System.Data.OleDb"%>
<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>The .NET DataSet and OleDbDataAdapter Objects</title>
<!-- #include file="..\global\style.inc" -->
</head>
<body bgcolor="#ffffff">
<span class="heading">The .NET DataSet and OleDbDataAdapter Objects</span><hr />
<!--------------------------------------------------------------------------->
<%-- insert connection string script --%>
<wrox:connect id="ctlConnectStrings" runat="server"/>
<div>Connection string: <b><span id="outConnect" runat="server"></span></b></div>
<div>SELECT command: <b><span id="outSelect" runat="server"></span></b></div>
<div id="outError" runat="server">+nbsp;</div>
<asp:datagrid id="dgrResult" runat="server" />
<script language="C#" runat="server">
void Page_Load(Object sender, EventArgs e)
{
// get connection string from ..\global\connect-strings.ascx user control
string strConnect = ctlConnectStrings.OLEDBConnectionString;
outConnect.InnerText = strConnect; // and display it
// specify the SELECT statement to extract the data
string strSelect = "SELECT * FROM BookList WHERE ISBN LIKE '1861003%'";
outSelect.InnerText = strSelect; // and display it
// declare a variable to hold a DataSet object
// note that we have to create it outside the Try..Catch block
// as this is a separate block and so is a different scope
DataSet objDataSet = new DataSet();
try
{
// create a new Connection object using the connection string
OleDbConnection objConnect = new OleDbConnection(strConnect);
// create a new DataAdapter using the connection object and select statement
OleDbDataAdapter objDataAdapter = new OleDbDataAdapter(strSelect, objConnect);
// fill the dataset with data from the DataAdapter object
objDataAdapter.Fill(objDataSet, "Books");
}
catch (Exception objError)
{
// display error details
outError.InnerHtml = "<b>* Error while accessing data</b>.<br />"
+ objError.Message + "<br />" + objError.Source;
return; // and stop execution
}
// create a DataView object for the Books table in the DataSet
DataView objDataView = new DataView(objDataSet.Tables["Books"]);
// assign the DataView object to the DataGrid control
dgrResult.DataSource = objDataView;
dgrResult.DataBind(); // and bind (display) the data
}
</script>
<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>
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