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Code Walkthroughs |
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Datagrid
Formatting the Data
We are
able to format the content of the datagrid cell by one of two simple methods,
dependant upon whether the column is a bound column or whether it is a template
column. In our example we shall format the column to have to digits after the
decimal point , followed by a...
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Datagrid
Highlight a Row With Click Through
It is
relatively easy to add alternating colours to the rows in your datagrid.
However, when we move the mouse over the rows we may want to highlight this
row, and possibly to add the option of a click through based on the row
selected...
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Add
a Delete Button to a Datagrid
To add
a delete button to a datagrid follows a similar process to adding an edit
button. In the datagrid header...
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Add
an Edit Button to a Datagrid
The
datagrid has a predefined editColumn for handling the editing of a datagrid.
Adding this simple column definition to a datagrid adds a powerful feature.
When a row is not in edit mode the column item shows the word...
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Making
a Datagrid Row Editable
Two of
the most popular methods of editing a datagrid in asp.net are to either select
the row and take the user off to a different presentation of the data, or to
change the formatting of the row presented in the database with appropriate
edit text boxes, checkboxes and...
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Adding
Tooltips to Datagrid Rows
Adding
tooltips to datagrid rows is easy, assuming that you have already created the
code for adding row highlighting. In this article I shall assume that you have
already read the article entitled Datagrid Highlight a Row With Click
Through...
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Binding
a Datagrid to an Access Database
This
list covers the full lifecycle of a content management system, from initially
creating the content, through to delivering it to end users...
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Adding
Data to a DropDownList
The aim
of this article is to answer the question 'How do I add items to a
DropDownList?' Initially as part of the declaration for the DropDownList we can
also define a number of items, much in the same way as in classic ASP...
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Getting
Current Date Time
In
classic ASP we had now() which would return the current date and time. For
asp.net this no longer exists. So what should we use...
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Test
if File Exists
Sometimes,
in order to reduce our chance of error, when working with the filesystem in
ASP.NET, we need to determine wether a file exists before performing an action
on it. The following short piece of code will enable us to test whether a file
exists...
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Using
Javascript with ASP.NET Form Elements
Adding
simple pieces of Javascript to an Asp.net page can be acheived by adding to the
attributes of the particular imagebutton or linkbutton. if its normal ASP.Net
Button then you can...
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Regular
Expressions
In the table below we list the characters used in .Net
regular expressions, together with their meaning, But first...
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Authentication
in Asp.net
Forms
authentication in ASP.Net is far more easier and safe than Asp 3. It is
possible to place a web.config file in any directory of a web site.Therefore,
we are able to make most of a web site public, whilst providing authentication
on, say, one directory...
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| 2.1 |
Why is there no DataGrid control on the Toolbox? |
| 2.2 |
Can I still use the DataList and Repeater controls? |
| 2.3 |
What's the difference between login controls and Forms
authentication? |
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2.1 Why is there no DataGrid control on the Toolbox?
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The DataGrid control has been superseded by the GridView control, which can do
everything the DataGrid control does and more. The GridView control features
automatic data binding; auto-generation of buttons for selecting, editing, and
deleting; automatic sorting; and automatic paging. There is full backward
compatibility for the DataGrid control, and pages that use the DataGrid will
continue to work as they did in version 1.0 of ASP.NET.
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2.2 Can I still use the DataList and Repeater controls?
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Absolutely. You can use them the way you always have. But note that the
controls have been enhanced to be able to interact with data source controls
and to use automatic data binding. For example, you can bind a DataList or
Repeater control to a SqlDataSource control instead of writing ADO.NET code to
access the database.
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2.3 What's the difference between login controls and Forms authentication?
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Login controls are an easy way to implement Forms authentication without having
to write any code. For example, the Login control performs the same functions
you would normally perform when using the FormsAuthentication class—prompt for
user credentials, validate them, and issue the authentication ticket—but with
all the functionality wrapped in a control that you can just drag from the
Toolbox in Visual Studio. Under the covers, the login control uses the
FormsAuthentication class (for example, to issue the authentication ticket) and
ASP.NET membership (to validate the user credentials). Naturally, you can still
use Forms authentication yourself, and applications you have that currently use
it will continue to run.
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