C# - Programmatically Iterate Through Pages Of A GridView?
Oct 26, 2010
I've created a wallboard application to display outstanding support calls for my ICT department. I've bound a number of gridviews to sqldatasources which execute a stored procedure. This is automated via asp.net ajax controls and partially refreshes the page/data every 30 seconds.
At the moment, when the number of records in the gridview goes over 9, the gridview automatically pages and shows the number of pages in the bottom right hand corner. The helpdesk can then VNC to the box which controls the screen and manually click to see what's on the next page.
What I am after is a way to programmatically (using the c# code-behind file) changing the current displayed page after 10/15 seconds or so, obviously if this is possible in the scope of the gridview. I trailed using javascript (and failed at jquery) of scrolling the gridview within a div, however this didn't work as expected.
Can anyone point me in the right example. I can't find anyone else querying this functionality via a quick Google.
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:FPConnectionString %>" SelectCommand="HDMonitoringOutstandingToday" SelectCommandType="StoredProcedure"></asp:SqlDataSource>
Link to printscreen of wallboard (not allowed to post images, damn newbie) >>> http://cl.ly/b48b88d9e5f9b7fa43ab
I am a total novice to VB so bear with me.In my web-based project, I pass an ID field as a parameter in my URL and go through each row in my gridview to find the correct row that matches the ID parameter, like so:
[Code]....
[Code]....
The problem is that this code only works if the corresponding ID is in a row displayed on the first page. I want to loop through each page in the gridview's rows until either the correct ID is found or it reaches the end of the data set. How do I do this? I assume I need another For loop that looks something like...
[Code]....
...that will go right before my other for loop, and one will loop through each page in the gridview. But obviously I've got that For Loop completely wrong. How do I do this correctly?
I wrote(attempted) a sub to disable all linkbuttons in a column in my GV. It seems code #1 just disables the LB in 1 row only.
Apropos MSDN link: [URL] [.NET Framework 4 - ASP.NET] Implementing Client Callbacks Programmatically Without Postbacks in ASP.NET Web Pages Using the code from the above link in the following code snippet, if you keep a break point on the statement "if (IsPostBack)" in the Page_Load event. The control moves into the "if (IsPostBack)" block after the alert, which mean that it is a Postback. Then, how come you say "...Without Postbacks"? I am getting confused here.
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ASPCS2008ClientCallbacksProgrammatically._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" [URL]> <%@ Implements Interface="System.Web.UI.ICallbackEventHandler" %> <script runat="server"> string aStringValue; public void RaiseCallbackEvent(String eventArgument) { aStringValue = eventArgument; } public string GetCallbackResult() { return aStringValue; } protected void Page_Load(object sender, EventArgs e) {............................................................
What I want is that I can add /edit or delete view pages. I don't want a complex content management system , just looking for any examples where one can add simple view page, I have no idea how to add action result dynamically, programatically on a controller page in mvc2.
I mean, it's easy to add a Button programmactically to an aspx page, but a server control's event handler probably has to be set early in the page life cycle (maybe before Control.Load event). As a result in reality, are dynamic controls rarely added to apsx pages?I wish there is a way to call postback at the server, so that a event is never too late.
I am wondering if MVC offers a handy function to iterate through all areas. I know I can search the sub-directories of Areas to achieve this. I am just curious.
Is it possible to iterate through an unordered list like the following in codebehind?
[Code]....
I was hoping to iterate through all the li elements of the ul checking whether NavigateUrl is equal to the current url. If it is, I was going to add a CssClass to give it a different appearance.
I think I know how to compare it to the page's url and to how to add the css class. I'm just not quite sure how you iterate through li items using a HTML Generic control.
I have a section of a form that I need to handle differently from the rest of form results. In the section that needs special handling I need to iterate over 3 form fields that have the same name. They have to have the same name, I can't change it. The section of the form I am referring to looks something like this:
I have List (Of Report). Report has 90 properties. I dont want write them each and every propertiy to get values for properties. Is there any waht to get propeties values from the List
Ex:
Dim mReports as new List(Of Reports) mReport = GetReports()
For each mReport as Report In mReports 'Here I want get all properties values without writing property names next
I have a blank/unbound GridView control on my form and I am binding it in the code behind like this:
GridView1.DataSource = _dataSet DataBind()
Running this code populates my GridView control with all the columns and data that _dataSet has. I want to display only some of the columns, change the column names, and rearrange some of these columns too (i want the last column from the actual sql database table to be displayed first in my GridView).
GridView gv = new GridView(); gv.AutoGenerateColumns = true; gv.DataSource = listOfEntities; gv.DataBind(); // set alignment for description column gv.Columns[0].ItemStyle.HorizontalAlign = HorizontalAlign.Left;
On the last line I get index was out of range error, and indeed if I inspect the GridView there's no columns yet. The Entity I am binding has 2 properties and they get rendered OK if I don't try to align them.
Is there a way to do this without having to dynamically assign a delegate to the DataBoundEvent of the gridview?
I have an html table in an aspx page (C#) that has columns like
1.CheckBox 2.Text 3.Text 4.TextBox
I want to iterate through the table one row at a time and process (run a stored procedure based on column2) based on whether the checkbox is checked or not. How will I be able to do that?
I want to set the box to be "checked" based on a value read from the database. I could handle the ItemDataBound event and read the database when each row is bound, but that results in n lookups. Instead, I want to handle DataBound, and then set all the values at once. So, in that method, I want code like this:
I have an asp website, and a dataset with a datatable. When I check I after configuring it it shows all the data. But when I run the code I got an exception System.Data.ConstraintException was unhandled by user code Message="Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints." I want to figure it out with iterating datarow.
I have a multi section form which the user can jump between sections to complete. Each section has its own validation group associated with it. I want to create a summary page which itterates through each of the validation groups and outputs if it is valid or not by changing an associated text.The problem that I am having is that once one validation group fails validation all subsequent sections also report as failing - presumably as the page.isvalid is still holding the fact that a previous group has failed
I have a datalist and a hyperlink control that holds a url. A user creates this datalist through an admin website and not all of the hyperlinks have a link in them. The issue is how to hide the link that doesn't have a url in the database field.
In the code behind I set the datasource with code and now I am stumped on how to reach into the items and control the visibility of the 'check this out' link based upon whether the db field has a link in it or not.
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { dtlPromoEvents.DataSource = LoadEvents(); //filter through the events and turn on visibility for the events that have a live link. dtlPromoEvents.DataBind(); } } public static DataSet LoadEvents() { DataSet eventInfo = new DataSet(); string connectionString = ConfigurationManager.AppSettings["ConnectBeerGeeksDb"]; using (SqlConnection selectConnInfo = new SqlConnection(connectionString)) { SqlDataAdapter adapterInfo = new SqlDataAdapter("SELECT [eventDate], [startTime], [eventHeading], [eventDetails], [eventLink] FROM [promoEvent] WHERE (eventDate + 1 > GETDATE()) ORDER BY eventDate", selectConnInfo); selectConnInfo.Open(); eventInfo.Clear(); adapterInfo.Fill(eventInfo); selectConnInfo.Close(); } return eventInfo; }
Adding the refined code that works on this url: [http://beergeekspub.com/events.aspx][1]
protected void dtlPromoEvents_ItemDataBound(object sender, DataListItemEventArgs e) { if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) { // Retrieve the Hyperlink control in the current DataListItem. HyperLink eLink = (HyperLink)e.Item.FindControl("eventLink"); // Check if a URL exists, if not then hide the control if (string.IsNullOrEmpty(eLink.NavigateUrl)) { eLink.Visible =false; } } }
I'm trying to read all filenames from a specified (server- not client) folder, and insert all the filenames into a javascript Array. It should behave like the Directory.GetFiles method in ASP.NET C#. I created a new array, and I just need the loop method (Javascript or jQuery) to iterate in the specific folder, and insert all the filenames into the array.
