-----------------------------------------------------------
New Message on MumbaiUserGroup
-----------------------------------------------------------
From: Swapnil_B1
Message 1 in Discussion
The Details View Control
Many applications need to work on a single record at a time. In ASP.NET 1.x,
there is no built-in support for this scenario. Creating a single record view
is possible but requires some coding effort on your part. You have to fetch the
record first, then bind its fields to a data-bound form, and optionally provide
paging buttons to navigate between records. The need to display the contents of
a single record is fairly common when you build master/detail views. Typically,
the user selects a master record from a grid and the application drills down to
show all the available fields. By combining GridView and DetailsView, you build
hierarchical views with very little code.
The DetailsView control can automatically bind to any data source control and
take advantage of its set of data operations. The control can automatically
page, update, insert, and delete data items in the underlying data source as
long as the data source supports these operations. In most cases, no code is
required to set up any of these operations, as shown here:
<asp:detailsview runat="server" id="det"
datasourceid="MySource"
autogenerateeditbutton="true"
autogenerateinsertbutton="true"
autogeneratedeletebutton="true"
allowpaging="true"
headertext="Employees">
<pagersettings mode="NextPreviousFirstLast"
firstpageimageurl="images/first.gif"
lastpageimageurl="images/last.gif"
nextpageimageurl="images/next.gif"
previouspageimageurl="images/prev.gif" />
</asp:detailsview>
The user interface of the DetailsView control can be customized using data
fields and styles in a way that is similar to the GridView. The DetailsView
doesn't support custom templates as this specific capability has been entirely
factored into the new FormView control. The DetailsView can have a command bar
with any combination of Edit, Delete, and New buttons. When you click Edit or
New, the control renders in Edit or Insert mode and the contents of fields are
displayed in textboxes. The working mode can be controlled through the Mode and
DefaultMode properties.
The DetailsView control lends itself very well to implementing no-code
master/details scenarios. Along with Edit and Delete buttons, the GridView
control supports the Select button, which is also predefined. You enable this
button on a per-row basis by setting the AutoGenerateSelectButton property to
true. When the users click on this button, the current row enters the selected
state and its zero-based index is assigned to the SelectedIndex property of the
GridView. In addition, the GridView control raises the SelectedIndexChanged
event. Applications can hook up to this event and run custom code.
In ASP.NET 2.0 there's no need to handle the SelectedIndexChanged event if you
want to build a master/detail view. You can drop a GridView and a DetailsView
control on the page and bind each to a data source. The trick for codeless
master/detail is to bind the detail control to a data source represented by the
currently selected record, as shown in the following:
<asp:sqldatasource runat="server" id="MyDetailSource:
selectcommand="SELECT * FROM customers"
filterexpression="customerid='@customerid'">
<filterparameters>
<asp:ControlParameter Name="customerid"
ControlId="masterGrid"
PropertyName="SelectedValue" />
</filterparameters>
</asp:sqldatasource>
The FilterExpression property of a data source object defines the WHERE clause
for the base query specified by SelectCommand. Parameter values can be
specified in a variety of ways, including through direct binding with a control
property. The <ControlParameter> object sets the @customerid parameter to the
value stored in the SelectedValue property of the master grid control.
Swapnil (Swaps)
http://swapsnet.spaces.live.com/
-----------------------------------------------------------
To stop getting this e-mail, or change how often it arrives, go to your E-mail
Settings.
http://groups.msn.com/MumbaiUserGroup/_emailsettings.msnw
Need help? If you've forgotten your password, please go to Passport Member
Services.
http://groups.msn.com/_passportredir.msnw?ppmprop=help
For other questions or feedback, go to our Contact Us page.
http://groups.msn.com/contact
If you do not want to receive future e-mail from this MSN group, or if you
received this message by mistake, please click the "Remove" link below. On the
pre-addressed e-mail message that opens, simply click "Send". Your e-mail
address will be deleted from this group's mailing list.
mailto:[EMAIL PROTECTED]
