Controls That Replicate Following Databinding Technique
Apr 20, 2010Nifty and free asp.net controls that replicate the following databinding technique? [URL]
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[Code]....
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``````````````````````````````````````````````````````````````
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Mar 2, 2012I have a SQL table containing a list of questions which admin users can add new questions too as and when they feel necessary.
I have a web form with a Repeater which displays these questions next to a checkbox and a textbox. When the user clicks the checkbox or the enteres data textbox I want to click and update button and store this data in a different table.
My current thinking is that this would go into a table with 30 bit fields for the checkbox values (c1-c30) and 30 text fields for the textboxes (t1-t30).
This would allow the admins upto 30 questions in the database at anyone time.
The question is how do i bind the controls in each row of the Repeater to its corrosponding SQL database field i.e row1 t1 and c1, row 2 t2 and c2 etc.
Code:
Protected Sub Repeater1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles Repeater1.ItemDataBound
Dim i = 0
Dim item As RepeaterItem
Dim checkBox As CheckBox = e.Item.FindControl("CheckBox5")
[Code]...
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Nov 29, 2010I want to create a form that will update an existing database record based on a querystring value passed to the page say UserId.
Rather then using data-bound controls such as the FormView, DetailsView, etc, I would like to use textbox controls, a dropdownlist and a checkboxlist to accomplish this alone. Is this possible? How do I go about binding the data from the database to these controls when the page is loaded and what data source should I create?
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May 18, 2010I am trying to bind a FormView on runtime in codebehind (instead of using predefined datasource).
[Code]....
GetCase will return a DataTable with just 1 row.Then on my aspx:
<asp:FormView DefaultMode="ReadOnly" runat="server" ID="FormView1" DataKeyNames="complaint_ID">
<ItemTemplate>
<asp:Label ID="lblComplaintID" runat="server" Text="<% Eval('case_ID'); %>" />
</ItemTemplate>
</asp:FormView>
Forms Data Controls :: Databinding Return 0 Value?
Sep 27, 2010I'm wondering why I'm getting value 0 for both "NumberOfReplies" &NumberOfRepliesinPercent ?
[Code]....
<asp:Repeater id="rptReplies" runat="server">
<%#DataBinder.Eval(Container.DataItem, "NumberOfReplies")%>
<%#DataBinder.Eval(Container.DataItem, "NumberOfRepliesinPercent")%>
[code]...
C# - Databinding Best Practice For User Controls In Web Forms?
Mar 3, 2010I was wondering about some best practices for data binding in web forms. For example we have a control:
public partial class MyUserControl : UserControl
{
public override void DataBind()
{[code]...
If we wanted that control to bind its data automatically we would do something like this:
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)[code]...
In the first section of code if we do our data binding before the call to base.DataBind() (#1) then that means that, if for example we databind a ListView, we don't have to call ListView.DataBind() because when we call base.DataBind() on our control it recursively calls DataBind on all child controls. Also, we won't have access to any of the properties of the control that were assigned to it using the data binding code blocks <%# %>
If we do our binding on our controls after base.DataBind() (#2) then this means that DataBind is called on these controls twice. Once when base.DataBind() is called, and the second time when we are forced to call control.DataBind(). I can follow here that I don't know about?
EDIT: Looking at this page:
http://msdn.microsoft.com/en-us/library/w5e5992d.aspx
Use this method to bind data from a source to a server control. This method is commonly used after retrieving a data set through a database query. The method is primarily used by control developers; most controls perform data binding automatically.It appears that best practice is to bind controls data automatically. Databinding is for when we explicitly set a data source.
Databinding - Different Techniques To Bind The Data Controls?
Mar 26, 2010Recently I was asked the following question at interview."What are the different way to bind a Data Control in ASP.Net".
I have answered
Typed DataSet
Collections
Stored Procedure.
The interviewer expecting a lot more. Can anyone explain me the different way that we can bind the data controls?
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Mar 29, 2010I have a gridview in which I have two drop downs. One is populated with values that are static, so I have a regular sub that does that in the code behind. I tried to add code for databinding the other ddl to a datatable. I cannot get this to work. It just comes up empty. My asp code is fine, and the datatable definately has data in it - just nothing gets populated.
One other thing - the code for the static ddl has worked fine, but when I add this other block (either to the same sub as that, or dow the rowdatabound event) the static one doesn't work either.
[Code]....
Forms Data Controls :: DataBinding + Extension Method?
Oct 24, 2010Inside my repeater I'm calling an extension method like so:
[Code]....
he above is giving me an "Object not set to an instance of a object" exception inside the extension method. If I comment the above expression out, it works fine, and the items are binded wtih no problems.
