I have a page that displays updated data every few seconds but instead of pulling data from database, I would like DB to push data only if the data has been changed. Is that possible?
View 10 RepliesI am having a slight issue with grabbing data from my masterpage into my content page (as a whole).
I have generated a public property for the my textbox and the contentpage can see this public property. But it comes across empty (even from within the masterpage). Now I guess the problem is with the property itself (possibly). It also shows as empty when I response.write it's value to the page.
Even when I call the value of the property in the masterpage it comes across as empty. The way I have this setup is that a textbox named pageTitleField has it's value updated from an iframe. All is working well and the textbox has its value updated correct upon iframe content changes. This is great. Now I just need to pass this textbox value into my content page and then set it as the document title.
see my code thus far.
My MasterPage
[Code]....
My MasterPage CodeFile
[Code]....
My ContentPage
[Code]....
My ContentPage CodeFile
[Code]....
I know the public property is being seen from the content page because if I just do a Response.Write(Master.GrabPageTitle) I see System.Web.UI.WebControls.TextBox appearing as the output of that property. So it appears hat the textbox value is not being captured in the public readonly property.
The Response.BinaryWrite( does not like what I am giving it.
I am making a ShowImage page pulling the image from a SQL table.
Here is where I am at the moment:
protected void Page_Load(object sender, EventArgs e)
{
string myConnection = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlConnection objConnection = new SqlConnection(myConnection);
objConnection.Open();
SqlCommand objCommand = new SqlCommand("SELECT TOP (1) NEWID() AS row,ImageID, ImageName, ImageType, ImageData FROM ImageTable Order by Row", objConnection);
objCommand.CommandType = CommandType.Text;
SqlDataReader objReader = objCommand.ExecuteReader();
if (objReader.Read() == true)
{
Response.ContentType = objReader["ImageType"].ToString();
Response.BinaryWrite(objReader["ImageData"]);
}
// RotateImage.ImageUrl = (string)objReader["url"];
// RotateImage.ImageUrl = (string)objReader["ImageData"];
// Response.ContentType = objReader["MIMEType"].ToString();
// Response.BinaryWrite(objReader["ImageData"]);
objReader.Close();
objConnection.Close();
}
Using a class component, an Object data source and a formview I am successfully pulliing data from a SQL database. In some cases the rows contain one or more Null values and I would like them to be ignored completely. My simple code follows:-
<%# Eval("add_1") & ","%>
<%# Eval("Add_2") & ","%>
<%# Eval("Add_3") & ","%>
OUTPUT:-
Rose Cottage, 123 New Road, Margate,
I have a templated control embedding a checkbox in a GridView I have an event on the checkbox which has a loop that pulls ALL of the checked checkboxes and the associated value. I only want to pull the datavalue of the checkbox that I just checked but the properties/methods associated with that checkbox event are not giving me any sort of index or item.value from which to do this.
View 2 RepliesI am currently adding checkbox functionality to a system. I would like to check a group of users and add them into a db table. I currently have the administrator values flowing into the db table fine but it will not insert the empID into the table from the gridview. Here is my code:[Code]....
View 5 RepliesI have searched endlessly for an answer but found nothing useful! I'm writing a simple blog application using Web Matrix and its going pretty well, but I have run in to a problem. I am storing the content of each blog post in a ntext field in a table with the intention of entering HTML in to the database and then have my application pull it out and insert it in to a few different view pages. The problem is that all of the '<' and '>' characters are getting converted in to '<' and '>' when my application pulls the HTML from the database and displays it. I understand that this is for security (preventing code injection?), but only trusted users will ever be able to write posts using my application. Here is a screen shot of what gets displayed by my application:
Is there a way to disable this behaviour or work around it somehow?
Im generating reports with around 8000 to 10000 records in grid view , my page give me time out error if data exceeds and it gives time out exactly after 30 secs.i have given command time out = 0 in webconfig file , but it still gives me the error . i have been using command time out property in code behind also
View 2 RepliesI use a gridview with products, in which one column lists the manufacturer, and the next colum lists the item number.This gridview works fine, but now I want to add a product image on the same row. Instead of using a stored image location, I simply want to make a link to the image like this:
"www.mywebsite.com/images/manufacturer/itemnumber.jpg "where the manufacturer and the itemnumber are the same as displayed in that particular row in the manufacturer and itemnumber columns. I am not versed well enough (yet???) to reuse the data from those two columns.
How can i refresh(Asych) the contents of my Datalist on the parent page from a data change in a page that is displayed in an iFrame on the parent page.
I have movie names with image in the data list that is on parent page.
there another page is openend in the parent pages in an iFrame control.
in that sub page i upload image and other data related to a new movie.
What i want is that when i submit that information in an iFrame page, the DataList should update(Asych) itself on the parent page showing new updated info.
the structure is like;
[code]...
I'm trying to pull a value from a Gridview so that I can create a running subtotal. I've looked at a number of examples but they all seem to fail.
Why does this not work? Each and every reference I try to make to the cells "value", comes up null.
Sample code1:
[Code]....
Sample code2:
[Code]....
In sample code 2, I get the "header text" for the column...but I know the value in the cell...so it fails on a data conversion.
I was hired to do some contract work for a short contract. I am looking at this code on this Aspx web form. What they do is load the labels for a radio button list from an ObjectDataSource object. Well this is the first time I have ever heard of an ObjectDataSource. The problem is that I don't even know where this object is pulling data from. With a SqlDataSource object, I can easily view the flyout menu to see the sql query where the data is being pulled from. Anyway, I need some figuring out where objectDataSourcePlanType lives and where it is pulling data from. I know I can't list the entire project, but I am sure someone who is familiar with ObjectDataSource
<tr>
<td>Type of Plan</td>
<td><img alt="Required" src="/Images/arrow.png" /></td>
<td>
<asp:RadioButtonList ID="radioButtonListPlanType" runat="server" AutoPostBack="True" DataSourceID="objectDataSourcePlanType"
DataTextField="PlanTypeName" DataValueField="PlanTypeId" OnSelectedIndexChanged="RadioButtonListPlanType_SelectedIndexChanged"
RepeatColumns="1" RepeatDirection="Vertical" AppendDataBoundItems="true">
</asp:RadioButtonList>
<asp:RequiredFieldValidator ID="requiredFieldValidator10" runat="server" ControlToValidate="radioButtonListPlanType" ErrorMessage="Type
of Plan is required."
SetFocusOnError="true" />
<asp:ObjectDataSource ID="objectDataSourcePlanType" runat="server" SelectMethod="ListPlanTypes" TypeName="Candle.Web.PlanRequest.CommonWeb">
</asp:ObjectDataSource>
</td>
</tr>
I have a GridView, bound to a table (Meals) in a SqlDataSource.
Into that GridView, I have added a TemplateField, which contains a DropDownList (which displays the numbers 1 - 10, added manually; no Data Binding). And, I've added a ButtonField.
When I click the Button, I want the values of some of the GridView rows PLUS whatever value was selected in the DropDownList to be pulled out and stored in a second Sql table (Orders).
Pulling the rows bound to the SqlDataSource is easy but JavaScript is needed (I think) to pull the SelectedValue from the DropDownList. I understand women more than understand JavaScript (that's how little I know) and the code below has been kindly offered by another forum user who is at a loss, himself, now.
Here's the code and the error message I'm getting.
ASPX:
[Code]....
And here's the Code Behind:
[Code]....
No design time errors reported but here's the run time error:
Object reference not set to an instance of an object.
On the following line:
Line 28: if (row.RowType == DataControlRowType.DataRow)
I have a page NewUserLogin.aspx wherein I want to store the new password in a sqldatasourcecontrol, the code goes like this
<asp:Content ID="Content1" runat="server" ContentPlaceHolderID="ContentPlaceHolder2">
<div>
<table cellpadding="3" cellspacing="3" style="width: 100%">
[code]...
I'm transforming lotus note application to ASP.NET.In lotus note, we can pass the application(data) from staff to his/her manager for approval.The staff can also check status of his/her data whether the manager is opening it, approved it or not.This process can be done in real time. I mean on the staff screen he/she will see status is changing from data sent --> manager is opening --> manager accepted or manager rejected it.In the same time, if other staffs try to track this application(data) they will see the same screen with the first staff.ow, in asp.net, i'm thinking of sending data from staff to manager directly. I don't want manager's web browser need to do polling for every xx millisecond. I'm not quite too sure it can be done or not in asp.net because i'm not the WEB guy.After doing a research for a while, i found that comet may help me on that but it seems pretty hard. And I don't know it is suitable for my problem or not or someone may guide me a better idea on this.
View 1 RepliesI would like to create an API for my website to send and receive data.
For example I need my customers to upload products, single or multiple items. Product feeds can be send daily, weekly or monthly.
Product Name:
Product Color:
Product Weight:
Product Images:
Also I need functionality to send this data to another server. And it should be user friendly.
where to start, what technology to use to make it simple and sufficient.
I have background in Asp.Net, C#. It would be great to see an example how to approach it.
I have written a web scraping program to go to a list of pages and write all the html to a file. The problem is that when I pull a block of text some of the characters get written as '�'. How do I pull those characters into my text file? Here is my code:
string baseUri = String.Format("http://www.rogersmushrooms.com/gallery/loadimage.asp?did={0}&blockName={1}", id.ToString(), name.Trim());
// our third request is for the actual webpage after the login.
HttpWebRequest request =
(HttpWebRequest)WebRequest.Create(baseUri);
request.Method = "GET";
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)";
//get the response object, so that we may get the session cookie.
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader reader = new StreamReader(response.GetResponseStream());
// and read the response
string page = reader.ReadToEnd();
StreamWriter SW;
string filename = string.Format("{0}.txt", id.ToString());
SW = File.AppendText("C:\Share\" + filename);
SW.Write(page);
reader.Close();
response.Close();
I'm developing chat application. I use flash as front end and asp.net back-end. My question is: can my asp.net web app send data to flash app in browser without post back ?actually it mean asp.net push data to flash client. I don't know much about flash or siverlight, dose flash support to do that ? or other way help me connect direct from server to browser without using post back or Jabber ?
View 4 RepliesI'm getting ready to start a C# web application project and just wanted some opinions regarding pulling data from a database. As far as I can tell, I can either use C# code to access the database from the code behind (i.e. LINQ) of my web app or I can call a stored procedure that will collect all the data and then read it with a few lines of code in my code behind. I'm curious to know which of these two approaches, or any other approach, would be the most efficient, elegant, future proof and easiest to test.
View 3 RepliesI have a web page which has about 11 gridviews.Hence the page takes bout 15 seconds to load.The grids are 1 below the other.They are populated at the page load.
I need a solution to reduce page load time. Is there a way,where the gridview loads only if user scrolls to it. I donot want the user to make selection for everytime he wishes to see a gridview. The page should show gridview if its data is bound to it, not waiting for entire page gridviews to get populated.
I am currently able to pass parameter from 1 page to another but I am unable to retrieve it.
<asp:HyperLinkField DataNavigateUrlFields="ID"
how can go to next page in gridview without refresh page
i thing programmers says wihtout postback?
How can I build a query in a new page using the value from a prevous pages control's value. I can transfer the value to the new page, I just don't know how to use the passed value to build a query. I want to populate a data grid filtering with values obtained from the proveous page.
View 3 RepliesI have a grid view where the user can change pages at either the top or the bottom of the grid view. I want the view to go back to the top whenever a user changes the page, whether they are changing from the top or the bottom. I've tried using anchors and javascript to achieve this but it does not work. The javascript is executed and the user is taken to the top of the gridview, this can be seen by placing an alert after the javascript to change the view. But the last thing that happens on the page change is that the window is returned to it's previous position (the bottom of the page). Is there any way of doing this?
View 4 RepliesI have this function:
[Code]....
I set itemsRead and startRowIndex in ViewState:
[Code]....
This is my PageIndexChanged event:
[Code]....
My purpose is to modified some data only for current page in a gridview. I call this function in page load and GridView_PageIndexChanged events. When it's called in page load event, it works fine. But when it's called in PageIndexChanged event, only the rows on the first page in GridView are looped through. For example, if I click page 5, the rowStartIndex becomes 100 = 5 x 20 (my pagesize). The if condition becomes itemsRead >= 100 andAlso itemsRead < 120. But after itemsRead is increased to 19, the For each gridViewRow loop stops and the if condition is never satisfied.