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Web Q&A: Onstop, Connecting to SQL with ASP, Hiding Images, Passing Values from a Control

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

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Passing values in pages


Hi! Friends..

how to pass the value from one page to another page in asp.net  with out Using State Management Concepts?

Like 1. cookies


        3. QueryStrings

     With out using the above should pass the values...

Passing HTML values from asp.net to asp


 We have a part of our website which is coded in classic asp. This takes the values of a login page (asp.net)  which uses 

<input type="text" /> to hold the values and then submit them to the asp page using the following line of code -

<input type="submit" value="Login" onClick="this.form.action='<%= SubmitURL() %>/login/login_user.asp?Type=Login&amp;this.form.encoding='application/x-www-form-urlencoded'; this.form.submit();" />

The asp page then retrieves the values using the code -

Value1 = Request.Form("Val1")

We now have a requirement to pre-populate the login values to provide an automated login process but don't want to change the older asp code. When we try to assign values to the input text in the asp.net page by assigning the value runat="server" the login fails as it does not seem to carry over when the page is submitted.

Is there a way where we can pre-populate the html textbox without making it unavailable to the asp page?


Passing Primary Key to User Control to Display Record Detail


I'm building a user control to display detail information on a parent record. The user control will be displayed via an Ajax Modal Popup. The user control works and is displayed when expected. The problem that I'm having is that I'm not able to pass in the primary key for the parent. The control is displayed via the _ItemCommand event of a Repeater. In the markup for the user control, I explicity set the ContactId to 0 to avoid an error when the control loads (its still underdevelopment, eventually that I'll check if the value is valid).

I was assuming that I could change the property in the _ItemCommand event, but obviously its not working.

In the Page_Load event this code successfully sets the ContactId property of the control. The _ItemCommand event appears to set the value. However when I set a test label on the user control to the Me.ContactId, its showing '0' as if it was never passed in.

        UserControlContactDetail.ContactId = "1462"
        test.Text = UserControlContactDetail.ContactId

    Protected Sub RepeaterDirectory_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.RepeaterCommandEventArgs) Handles RepeaterDirectory.ItemCommand

Protected Sub RepeaterDirectory_ItemCommand(By

Passing values from vb to jquery


I have an asp.net page with a vb code behind file. I also have a simple menu built with an unordered list which is controlled by jquery. Basically, how do I pass a value from the vb code behind file to the jquery? At the moment im assigned the value to an asp:label  that I'm able to read in jquery, but it's a bit messy. Is there a better way of doing it?



passing object values from server to client problem


I get a message that x_login is not declared.  I added Dim login as String = "123", but that didn't help.  What's the problem?

code behind....

Dim Login = "123"
x_login.Value = loginID


<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<form id="simForm" runat="server" method='post' action='https://test.authorize.net/gateway/transact.dll'>
        <input id="HiddenValue" type="hidden" value="Initial Value" runat="server" />
        <input type='hidden' runat="server" name='x_login' id='x_login' />
        <input type='submit' runat="server" id='buttonLabel' />



Help with updating database with values from Repeater control using c#


Hello, I'm new to ASP.NET 3.5 with C#. I really need some help.

I used a Repeater control to create a simple (editable) list where, when a user logs in, they can edit their list of expenses.  The ASP page works fine.

 My issue is with the code-behind.  I am really confused with how to extract the values from the repeater control. The FindControl method does not seem to be working.  Also, the code I am using resets my 'Amount' values back to 0.00. (0.00 is the amount the user sees when they first encounter the page).

 Here's a portion of the code on the ASP page:

<asp:Repeater ID="Repeater1" runat="server" DataSourceID="SqlDataSource1"





<td><asp:Label ID="lblExpId" runat="server"  Text='<%# Bind("ExpId") %>'></asp:Label> </td>

 <td><asp:Textbox ID="lblExpense" runat="server" Width= "190px" Text='<%# Bind("ExpenseName") %>'></asp:Textbox> </td>

 <td><asp:Textbox ID="txtAmount" runat="server" Width= "100px"

Control Values When Returning to Page


Why do controls value not persist when returning to a page (e.g. via browser back button)?  If I set control values without utilizing a post back the controls will maintain their last value when I return to the page.  If I set a control value and then call a post back, the control value is reset to the default value when returning.

I have many pages with a gridview, and a textbox which is used to filter the gridview contents.  I set the filter textbox, filter the gridview (postback), go to another page, and when I return to the gridview page (via back button), my filter textbox is reset empty, and the gridview is the original (unfiltered) data.

What concept am I missing here?

Thanks in advance...

ascx control with passing parameter

i want to create a ascx control with passing parameter .i got followong code from stackoverflow<% Html.RenderPartial("~/Views/Shared/MyControl.ascx", {data model object}) %>i am fine above line but how can i design html control for this.sample code example would be great.

Values in user control fields empty when AutoEventWireup=true ?

As a BizTalk developer I'm trying to build a ASP.NET website so some obvious things might be new to me (so please be gentle). I have a web form and I have a user control on it. This user control contains a panel with some user properties that are to be stored in a database. So far nothing fancy. The user control itself contains a panel and is working fine (all code to retrieve and store the values is working). I used the default settings of creating a user control and one of them was AutoEventWireup=true. This works fine because I also have some dropdown boxes (and other fields) that need to be filled with values from the database and that happens in the Page_load event. The panel specifies the 'DefaultButton' which calls a method when clicked to save the values after the user has changed them. On this click the code of the method is called, I confirmed that, but I found out that the values of my controls on the user control (for example the Textbox control) are empty. As a non-ASP.NET developer I couldn't figure out why. So I changed some settings like AutoEventWireup to false. Off course this resulted in my dropdown boxes no longer to be initially filled, but my surprise was big to find out my controls actually contained the values the user typed in. Logically I need both the values and th

Hiding other month dates in ASP .Net Calendar Control

Often we need ASP .Net calendar control in our webpages. Most of the times we require navigation in between dates of the calendar control but there can be a requirement that when we want that users should not be able to select dates from month other than the current month.Some people might be thinking in mind that Microsoft has provided theShowNextPrevMonth property of a calendar control which can be set to false in order to disable the navigation in between months. Ok, this will disable navigation but what about the dates of adjacent months shown in current month?Following is the output of a normal Calendar control when ShowNextPrevMonth is not set to false.Note the red circles in above image. July and September will allow you to navigate through other months and red circles below will allow you to select dates of adjacent months.Ok now we set the ShowNextPrevMonth property to false and see the output. Following is the output in this case.So setting out the ShowNextPrevMonth property has disabled the July and Septemberlinks but dates of adjacent months are still there which can be selected as well. How to disable/hide these? Unfortunately there is no such default property provided using which one can disable or hide these dates but fortunately doing this using code is not a complex task. Use following code a

Passing Id to a querystring in a Listview Control

I have tried almost evrything and nothing seems to work,,, I dont see errors but the code is not firing when I bind in the properties of the button control ,,nor the code behind., much help is appreciated,,aspx<LayoutTemplate>                <table id="Table1"cellpadding="0" cellspacing="0" style="border-right: #000000 thin solid; border-top: #000000 thin solid;                                    border-left: #000000 thin solid; border-bottom: #000000 thin solid; background-color: #FFFFFF; border-width: 1px;"                                    width="100%" align="center">        <tr>            <td>                    <b>Matching Providers </b>        

Accessing a row's dropdownlist values AFTER the gridview control is in Edit mode

Hello, I have a gridview control. When it goes into Edit mode, there are 3 dropdownlists in one cell that are populated by separate stored procedures during the RowDataBound event. The 1st dropdownlist's value is used as a parameter to determine what the 2nd dropdownlist is populated with. The 2nd dropdownlist's value is used as a parameter to determine what the 3rd dropdownlist is populated with. Everything works fine when the row is first put into Edit mode. While I'm in Edit mode and I change the selection in the 1st dropdownlist, how do I access the control so I can feed this new parameter to the 2nd dropdownlist? I have the first 2 dropdownlists set for AutoPostBack so that the Page_Load event is fired when the user changes a value. I know how to get access to these controls via the FindControl method when the row is being databound but how do I find the control during the Page_Load event? Thanks for any help!!!   Penny  

Passing values from web page to custom security trimmer in SharePoint 2010

Hi, In SharePoint 2007 we had a custom security trimmer that implemented ISecurityTrimmer interface. We also had a custom webpart used for search. Now, using HttpContext we passed values from the webpart to security trimmer with additional info needed to trim the results. It worked since trimmer was executed in the same w3wp process as webpart. Now in SharePoint 2010, the architecture for ISecurityTrimmer2 has changed, as it's executed in search process (other w3wp) - not the webpart w3wp so it has no access to the HttpContext. Question is: how to pass custom data, in form of the string, to a security trimmer when search is done from custom code in webart?

Report Viewer Control and Passing Paramaters

Hi Guys, I have a situation where I am created a WEB APP that has a submit button on a FORM on the first ASPX page.  I have some VB code behind that to generate Header and Lines records in two tables with a HEADER ID as my PK.  I have another ASPX page which has the Report Viewer control on it and prompts me for the HEADER ID and displays the report correctly when I manually enter the HEADER ID.What I am now trying to achieve is when the user clicks the submit button on the FORM I want it to redirect to the other ASPX page and pass through the Header ID as a Parameter and automatically display the REPORT. Can somebody please point me in the right direction to achieve this.ThanksJoel 

problem with passing parameter values to stored proceedure from asp.net c#

hi all, i am facing a problem while passing parameters to a stored proceedure. following is my sql query written for creating this stored procedure:   CREATE proc [dbo].[getstudent]( @wherecolumn nvarchar(2000), @wherevalue nvarchar(2000)) asbegin  declare @sql nvarchar(max) set @sql = 'select * from student2 where ' + @wherecolumn+'='+@wherevalueexec sp_Executesql @sql end   my table contains four columns: And the sql Query For the table is as follows:   CREATE TABLE [dbo].[student2]( [name] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, [rollno] [int] NOT NULL, [class] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, [section] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, CONSTRAINT [PK_student2] PRIMARY KEY CLUSTERED ( [rollno] ASC)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]) ON [PRIMARY]   from page behind I am passing the values to parameter as follows:   SqlCommand command = new SqlCommand("getstudent", c.con); SqlDataAdapter datadapter = new SqlDataAdapter(c.cmd); command.CommandType = CommandType.StoredProcedure; command.Parameters.Add("@wherecolumn", SqlDbType.NVarChar).Value = "rollno"; command.Parameters.Add("@wherevalue", Sq

Passing values to same kind of controls

Hi all, I have two user controls attached to my Master page. (vb.net) These user controls display ads, and the pnly difference between them is the width of the ads they should diplay. Is there some way in which I can just register one user control, but use it twice, and then pass different integers to them? In other words, instead of having this: @ Register Src="Ads240.ascx" TagName="Ads240" TagPrefix="uc240" %> @ Register Src="Ads120.ascx" TagName="Ads120" TagPrefix="uc120" %> I'd only like to register one of them: @ Register Src="Ads.ascx" TagName="Ads" TagPrefix="ucAds" %>   Then from the .aspx page I'd like to have two of these:  <ucAds:Ads ID="Ads" runat="server" /> but kind of send different values to them (like "Usercontrolparameter=120") How do I do this? I have looking at properties and the like, but I don't know if they can let me reuse the user control file with different values. Thanks for any help! /Pettrer  
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