I would like to retrive data on database and display the results assyncronously
I think of using 2 threads : one thread reads data database and another thread displays the data that arrives.
I have a page where I will insert all the data into the database. The page where I'm having problems is when I select an item from the checkboxlist it only displays one item. The data which is displayed is only the one that was inserted with one selected item from the checkboxlist. The following code is the page I'm using to try to retrieve the data from the database. I am trying to do is when a user selects the first, second, or third, or fourth item. The corresponding data appears in the gridview. In my current code, the record which has one item selected appears. If the user has more than one selected it does not appear. It comes up as empty. Is there a way I can do it?
[Code]....
I am using visual studio 2010, asp.net 4.0 (c#)
My problem is:
How do I display results from my database on a gridview based on the selected row of another gridview.
For example, I have a e-shop web app and I have a product categories table in my database displaying the data on a gridview.
I want to be able to click on the select button on each row and use that event to populate another gridview based on the ID of the product category that is clicked. E.g say the 'CDs' row is clicked, another gridview shows all the different CDs.
As a result, I need the select(sql) statement for the second table to be dynamic based on what the user clicks.
Has anyone done anything like this before?
I want to search record based on Name, ID, Date, Report Type. from same table with one textbox. I can do search with one column how can do it with multiple column ...
protected void Button2_Click(object sender, EventArgs e)
{
DateTime dt = Convert.ToDateTime(TextBox1.Text);
SqlCommand cmd = new SqlCommand("SELECT * FROM Transactions where report_type = @report_type ");
cmd.Connection = con;
[Code] .....
I need a query to fetch records from data from database based on partial text entered in textbox like search data from College table based on College Name entered in text box. I want that all record containing that College name displayed in grid view.
View 1 RepliesI have a application which connects to database. I have like 97 thousands data on the database. When I search something from front end and display those matching results on the browser, it crashes everytime (for huge number of data).
I'm using Dataset to retrieve data from database and display those matching results on Gridview(or repeater).
e.g. If I search 'abuse' it matches 65 thousands records and I can't retrieve and display those on browser, the browser crashes everytime.
I can search and display whole records without crashing the browser?
I am creating a kind of feedback website which has a feedback form on it. Each question is answered choosing from a radio button group. the answers to each question are (very good, good, bad, failed). I need to be able to create a table on the webform that will display the number of answers to each questions. for example, if the question is "Rate the use of this software" i need to be able to put in table format say 20 people said "very good", 30 said "good" etc. at the moment i only have one table to display the questions and answers and a date that will be used to select the date's report. so all the information i need is coming from this table. all i need to do is how to say like "SELECT Count* Question where Review date = "user entered date" and answer = "very good" etc.
View 4 RepliesI would like to display the following information for each "Camera" (in the format below) on my web page in an HTML table. All the data is contained in one table in my database:
For Camera = Canon (e.g.):
Type (Text via asp:Label)
Lens Size (Text via asp:Label)
Storage (Text via asp:Label)
Max. video resolution (Text via asp:Label)
Max. photo resolution (Text via asp:Label)
Weight (Text via asp:Label)
Dimensions (Text via asp:Label)
Sensor (Text via asp:Label)
...where (Text) is the value retrieved from the database for the given Camera. advise on the best way to retrieve this data? The only method I can think of (from my limited experience!) is to have a separate VB function for each value, to run separate SELECT queries for each field, and then to set the (Text via asp:Label)
value accordingly. I am already doing this for datagrid retrieves etc. For example:[Code]....
BUT... I know there must be a better method for the above requirement!
I am trying since more than 5 days to retrieve and display an image in a web page, no success so far.1. I have a table named image, with three fields ImageID, Img_data, Img_contenttype .2. I am able to display the ImageID as a link in my page.3. On clicking the link i am going to my viewImage.aspx?img=ImageID .This far it works ok. ImageID is passing in the query string.4. In this page imageID is being captured from query string and stored in ImageIdview int variable. viewImage.aspx has an image tag to display the image as below.
<asp:Image
id="image1"
ImageUrl='<%# "ViewImageHandler.ashx?imgid=" + Eval("ImageIdview")
[code]...
I have data in mydatabase. My AnswerText in the database is test1,test2,test3 While retrieving it is displaying as test3,test1,test2. I am using the below code to display the data.
Dictionary<string, string> dicKeyValues = new Dictionary<string, string>();
for (int i = 0; i < cnstsData.Answer.Count; i++)
{
dicKeyValues.Add(AnswerText, AnswerImage);
}
DataList.DataSource = dicKeyValues;
DataList.DataBind();
I want to display the AnswetText as test1,test2,test3. Basically i want the same order which i added to the database while retrieving also.
I am trying to develop a page where I am trying to search a database (MyQSL) and display the data in a table format. Some of the database entries, like category, is stored as integer values, but I want to display the category name in the search result (not the corresponding integer value). I have also another issue, every time I change the dropdown list values (which are having "auto postback" enabled) the <EmptyDataTemplate> is returned. At this moment I am using GridView. But I am ready to change this to any other method, like repeater or whatever...
View 2 Repliesi want if i search UserName 'xdeeeee' that is not exist in database then a label should display saying "Sorry ‘USER NAME’ not found".
have a look below picture.
<asp:TextBox ID="SearchByUserName" runat="server"></asp:TextBox>
<asp:Button ID="SearchByTagButton" runat="server" Text="SEARCH" OnClick="SearchByTagButton_Click" /><br />
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Not sure if this is for SQL or .net! I have 3 tables which looks like
table1
ID Name
1 Jon
and
table2
ID Number Job
1 1 IT
2 1 Web
3 1 Admin
table1
ID ContractType
1 Temp
1 Perm
An inner join makes one table with 3 rows (I excluding the ID from table 2 for the join) which is saved as a view
viewTable
ID Name Number Job ContractType
1 Jon 1 IT Temp
2 Jon 1 Web Temp
3 Jon 1 Admin Temp
4 Jon 1 IT Perm
5 Jon 1 Web Perm
6 Jon 1 Admin Perm
I want to display these results on a web page via the grid view. However, I don't want to show the user 6 times! I want to show the user name once, the contract type once and each Job! What is the best way to do this? Is there a fault with the database design already? I assume the easiest answer is to not join them in a view but query each section 3 times from the website but I'd rather 1 connection only!
here is the way i store my image...
[code]....
how i can retrieve the image from the database and display it in my form?
I have an image table which stores images in binary format and an image_ id is associated with every image
My Question is i want to retrieve these images and bind then to the image button. How can we do this?????
I am using asp.net 3.5 with vb ....
In the following code, I need to modify the Handler so that the records or results that display are based on a QueryString value. Currently all of the records in the table display on the page but I want records to display based on the passing a querystring value based on the field, id. I have tried to alter the code without much success.
Public Class FileVB : Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
Dim id As Integer = Integer.Parse(context.Request.QueryString("id"))
Dim bytes As Byte()
Dim contentType As String
Dim strConnString As String = ConfigurationManager.ConnectionStrings("fitnesConnectionString").ConnectionString
Dim name As String
Using con As New SqlConnection(strConnString)
Using cmd As New SqlCommand()
[CODE]..
In gridview I have two link button that is "VIEW" and "DOWNLOAD" if I click "view" that pdf file will display in an other page if I click download that file will be downloaded.. how can i do this..
View 1 RepliesHow can i display in web browser directly from the database varbinary Office Files (Word, Excel, PowerPoint, and many others like Images), like this example in PDF [URL] ....
View 1 RepliesI used tinyMCE in my edit.aspx page that bind it from database
TextBox1.Text = _dr["description"].ToString();
and users can change this editor text and click on button and update information
below is code
protected void ImageButton2_Click1(object sender, ImageClickEventArgs e)
{
string data = Session["behcode"].ToString();
SqlCommand _cmd = new SqlCommand("insertstate", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
_cmd.Parameters.AddWithValue("@Name", txtstore.Text);
_cmd.Parameters.AddWithValue("@Ownername", txtowner.Text);
_cmd.Parameters.AddWithValue("@Description", TextBox1.Text);
_cmd.ExecuteNonQuery();
Session["Message"] = true;
_cn.Close();
}
in database I have House_info table that has description column and if I enter text in textbox1 it update description column now problem is when I enter text in textbox1 it didn't change text and didn't update data in database...
I put breakpoint in imagebutton2_click event and see in this code
_cmd.Parameters.AddWithValue("@Description", TextBox1.Text);
it didn't send any text from textbox1 and show text that bind from database and didn't change it... so what should I do?
I would like to query a DB and output the results to the webpage. What is the best way to do this while avoiding gridview, etc?
So far I have the following code: (which works)
sqlLookup = "SELECT * FROM locations";
string connectionString = WebConfigurationManager.ConnectionStrings["LocationDatabaseConnectionString"].ConnectionString;
SqlConnection myConnection = new SqlConnection(connectionString);
myConnection.Open();
SqlCommand myCommand = new SqlCommand(sqlLookup, myConnection);
SqlDataReader myReader = myCommand.ExecuteReader();
while (myReader.Read())
{
locationCode = myReader["locationCode"].ToString();
locationName = myReader["locationName"].ToString();
notes = myReader["notes"].ToString();
}
In the past I used to inject HTML into a DIV element via the WHILE loop but this always creates a huge delay when renering the page. Is there a better method?
I have DataPager and ListView in one page aspx. DataPager is working if I do not search item. DataPager is not working to display the searching reasults. Below is the complete code in one page aspx. I am using VS 2008.
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I have a datalist and want the results paged I have written a pager.ascx page and have an aspx and aspx.cs page to display the results. I have a stored procedure to pull the data out of the database and a class to talk between the stored procedure and presentation controls I have the pager being displayed when the results get over the limit I have set to 10 in the web.config file but when i click on the next link to display the next page of results it doesn't do anything. my aspx page is
<uc1:Pager ID="topPager" runat="server" Visible="False" />
<asp:DataList ID="newsList" runat="server" CssClass="List" align="center">
<ItemStyle CssClass="ItemList" />
<ItemTemplate>
<h2><%# Eval("Title") %></h2>
<p>Posted <%# Eval("Date") %></p>
<p><%# Eval("News").ToString().Replace("
", "<br />") %></p>
</ItemTemplate>
</asp:DataList>
<uc1:Pager ID="bottomPager" runat="server" Visible="False" />
my aspx.cs page is
protected void Page_Load(object sender, EventArgs e)
{
// Retreive page from the query string
string page = Request.QueryString["Page"];
if (page == null) page = "1";
// How many pages of posts
int howManyPages = 1;
// pager links format
string firstPageUrl = "";
string pagerFormat = "";
//DataAccess.GetNews returns a DataTable object containing news data which is read into datalist
newsList.DataSource = DataAccess.GetNews(page, out howManyPages);
// Bind the data to the data source
newsList.DataBind();
// have the current page as interger
int currentPage = Int32.Parse(page);
// Display pager controls
topPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, false);
bottomPager.Show(int.Parse(page), howManyPages, firstPageUrl, pagerFormat, true);
}
my pager.ascx page is
<p>
Page
<asp:Label ID="currentPagelabel" runat="server" />
of
<asp:Label ID="howManyPageLabel" runat="server" />
|
<asp:HyperLink ID="previousLink" runat="server">Previous</asp:HyperLink>
<asp:Repeater ID="pagesRepeater" runat="server">
<ItemTemplate>
<asp:HyperLink ID="hyperlink" runat="server" Text='<%# Eval("Page") %>' NavigateUrl='<%# Eval("Url") %>' />
</ItemTemplate>
</asp:Repeater>
<asp:HyperLink ID="nextLink" runat="server">Next</asp:HyperLink>
</p>
my pager.aspx.cs page is
using System;
// Simple struct that represents a (page number, url) association
public struct PageUrl
{
private string page;
private string url;
// Page property definition
public string Page
{
get
{
return page;
}
}
// Url property definition
public string Url
{
get
{
return url;
}
}
// Constructor
public PageUrl(string page, string url)
{
this.page = page;
this.url = url;
}
}
// The pager control
public partial class UserControls_Pager : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
}
// Show the pager
public void Show(int currentPage, int howManyPages, string firstPageUrl, string pageUrlFormat, bool showPages)
{
// Display paging controls
if (howManyPages > 1)
{
// make the pager visable
this.Visible = true;
// Display the current page
currentPagelabel.Text = currentPage.ToString();
howManyPageLabel.Text = howManyPages.ToString();
// Create the Previous link
if (currentPage == 1)
{
previousLink.Enabled = false;
}
else
{
previousLink.NavigateUrl = (currentPage == 2) ? firstPageUrl : String.Format(pageUrlFormat, currentPage - 1);
}
// Create the Next link
if (currentPage == howManyPages)
{
nextLink.Enabled = false;
}
else
{
nextLink.NavigateUrl = String.Format(pageUrlFormat, currentPage + 1);
}
// Create the page links
if (showPages)
{
// The list of pages and their URLs as an array
PageUrl[] pages = new PageUrl[howManyPages];
// Generate (page, url) elements
pages[0] = new PageUrl("1", firstPageUrl);
for (int i = 2; i <= howManyPages; i++)
{
pages[i - 1] = new PageUrl(i.ToString(), String.Format(pageUrlFormat, i));
}
// Do not generate a link for current page
pages[currentPage - 1] = new PageUrl((currentPage).ToString(), "");
// Feed the pages to the repeater
pagesRepeater.DataSource = pages;
pagesRepeater.DataBind();
}
}
}
}
my class file is
// Retreive the list of news posts
public static DataTable GetNews(string pageNumber, out int howManyPages)
{
// Get a configured DbCommand object
DbCommand comm = GenericDataAccess.CreateCommand();
// Set the stored procedure name
comm.CommandText = "GetNews";
// create a new parameter for page number
DbParameter param = comm.CreateParameter();
param.ParameterName = "@PageNumber";
param.Value = pageNumber;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
// create a new parameter for products per page
param = comm.CreateParameter();
param.ParameterName = "@PostsPerPage";
param.Value = PlatiumMindProductionsConfiguration.PostsPerPage;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
param = comm.CreateParameter();
param.ParameterName = "@HowManyPosts";
param.Direction = ParameterDirection.Output;
param.DbType = DbType.Int32;
comm.Parameters.Add(param);
// Execute the stored procedure and saven the results in a DataTable
DataTable table = GenericDataAccess.ExecuteSelectCommand(comm);
// Calculate how many pages of posts and set the out parameter
int howManyPosts = Int32.Parse(comm.Parameters["@HowManyPosts"].Value.ToString());
howManyPages = (int)Math.Ceiling((double)howManyPosts / (double)PlatiumMindProductionsConfiguration.PostsPerPage);
// return the page of posts
return table;
}
my stored procedure is
ALTER PROCEDURE [dbo].[GetNews]
(@PageNumber INT,
@PostsPerPage INT,
@HowManyPosts INT OUTPUT)
AS
-- Declare a new table
DECLARE @News TABLE
(RowNumber INT,
NewsID INT,
Title NVARCHAR(50),
Date DATETIME,
News NVARCHAR(MAX))
-- Populate the table with the complete list
INSERT INTO @News
SELECT ROW_NUMBER() OVER (ORDER BY NewsID desc),
NewsID, Title, Date, News
FROM News
-- return the total number of posts
SELECT @HowManyPosts = COUNT(NewsID) FROM News
-- extract the request page of posts
SELECT NewsID, Title, DATE, News
FROM @News
WHERE RowNumber > (@PageNumber - 1) * @PostsPerPage
AND RowNumber <= @PageNumber * @PostsPerPage
I have a button called Next outside the GridView. If I click on Next, I want to highlite the 2nd row and display the details of the 2nd row below in panel. If again I click on Nextm i want to highlite 3rd row and want to display 3rd row results in a panel
View 8 RepliesI have enabled User Rolls and assigned several Roll names such as 10, 11, 12, etc. I have a SQL Table that contains various fields of information including one named AuthorizedUserRoll, it's nchar(2).
A logged in user should only see the records in Gridview that matches his/her roll.
I'm using Web Forms and VB.
I am creating a web application using c#. I need to access the values available in a barcode scanner and display it in the web page. The user has a Barcode scanner, which contains the Student Id's. The Barcode scanner is connected to the user machine. Is it possible to access the scanner and access the student id available in the scanner and display it in the aspx page. After retrieving the values and displaying it in page, the students id's available in the scanner has to be deleted.
View 3 Replies