ASP.NET

keyur satyadev2-Jun-12 1:10

keyur satyadev

2-Jun-12 1:10

Well, you can just check on page load that if user is logged in then display the page.

Otherwise redirect to login page or display alert message that please login.

There is no requirement of
Response.Expires = 0
Response.Cache.SetNoStore()
Response.AppendHeader("Pragma", "no-cache")

Let me know if you have any doubts.

thank you.

Regards
Keyur Satyadev

taha bahraminezhad Jooneghani

taha bahraminezhad Jooneghani3-Jun-12 2:19

3-Jun-12 2:19

when the users log on set a session for your users,
and check session in target pages, and when user log out just remove that session!

Session.Add("userID",ID);
Session.Remove("userID");

for checking session:

if(Session["user"]!=null)
{
    //do your works
}
else
{
    Response.Redirect("default.aspx");
}

FREE Code Conversion VB6 ASP VB.NET C# ASP.NET C++ JAVA PHP DELPHI ColdFusion
HTML Marquee & its alternatives

thatraja4-Jun-12 17:13

thatraja

4-Jun-12 17:13

Check this Tip/Trick
Browser back button issue after logout[^]

thatraja

Nobody remains a virgin, Life screws everyone Sigh | :sigh:

Re: 2010 web form problem

august_star4-Jun-12 21:28

august_star

4-Jun-12 21:28

Try this
- Logout button event:

String pageUrl = "";
pageUrl = Request.Url.ToString();
Session.Abandon();
Response.Redirect(pageUrl);

- And in other page that need session to work try

protected void Page_Init(object sender, EventArgs e)
{
    Response.Cache.SetNoServerCaching();
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    Response.Cache.SetNoStore();
    Response.Cache.SetExpires(new DateTime(1900, 01, 01, 00, 00, 00, 00));
}

2010 web form problem

sc steinhayse31-May-12 11:22

sc steinhayse

31-May-12 11:22

When I am stepping though some code in a C#.net 2010 web form application, an exception is thrown saying a 'column name' is invalid. As far as I can tell the dbml property name is spelled the same way it is spelled in the for the column in the specificied table.. I checked the property values for this date column and it is like all the other properties for other date columns in this table.

When I comment out the column in the application, all the of rest of the linq commands work correctly.

Thus can you suggest what I should check to see what is wrong?

R. Giskard Reventlov31-May-12 15:20

R. Giskard Reventlov

31-May-12 15:20

Not without seeing at least some of the pertinent code.

"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum

me, me, me

Re: 2010 web form problem

taha bahraminezhad Jooneghani3-Jun-12 2:48

taha bahraminezhad Jooneghani

3-Jun-12 2:48

this kind of error happens sometime in coding, set break point that part commented, and give us some code snippet!

calling a function from a hyperlink

wiins31-May-12 8:08

wiins

31-May-12 8:08

Can anyone help with this please? I have a webpage with an asp.net frame on it- the frame shows the contents of an html document. When someone clicks on a link in the html document, I need to show some content in another frame on the same page.

So, the question is, what should MyTag be in the following html, so that asp.net server receives an event, with "that" as a parameter, which it then uses to populate another frame on the same page.

<p>to be or not to be, <myTag>that</myTag> is the question</p>

Note that the contents of the frame is html, so it can't contain an asp control. Maybe the answer is some javascript?

Any ideas?

thanks...

jkirkerx31-May-12 13:30

jkirkerx

31-May-12 13:30

wiins wrote:
So, the question is, what should MyTag be in the following html, so that asp.net server receives an event, with "that" as a parameter, which it then uses to populate another frame on the same page.

I think you should edit the question, and find a better way to describe what you wish to achieve.

Will the event just issue a postback to the server?, and what will the event try and do?

wiins31-May-12 22:15

wiins

31-May-12 22:15

I mean call a method in asp.net. It doesn't matter what the method does, I just need to be able to call it with a parameter.

The only problem I'm concerned with in this question is what I can have in the Html.

To recap- the user sees on the browser some underlined text in html, and clicks on it. I need that to result in a method being called in asp.net.
It's exactly what you could achieve using an asp.net LinkButton, but remember it has to be html.

If you use a LinkButton, then asp.net will convert it to some javascript when it's sent to the browser, so maybe my answer is a bit of javascript?
Is that the best and simplest way?
thanks

jkirkerx1-Jun-12 6:57

jkirkerx

1-Jun-12 6:57

I see things like that in news reports, or wikipedia, in which a term will be presented within an article of explanation, and you can click on that term, to go to a detailed explanation of that term.

I don't know if I'm on the right track here, but this is what I know about it.

Example:

<p>Oligarchy (from <a href="/wiki/Greek_language" title="Greek language">Greek</a> <span xml:lang="grc" lang="grc">ὀλιγαρχία</span> (oligarkhía); from ὀλίγος (olígos), meaning "a few", and ἄρχω (archo), meaning "to rule or to command")<sup id="cite_ref-0" class="reference"><a href="#cite_note-0"><span>[</span>1<span>]</span></a></sup><sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>2<span>]</span></a></sup><sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span>[</span>3<span>]</span></a></sup> is a form of <a href="/wiki/Power_structure" title="Power structure">power structure</a> in which <a href="/wiki/Political_power" title="Political power" class="mw-redirect">power</a> effectively rests with a small number of people. These people could be distinguished by royalty, wealth, family ties, education, corporate, or military control. Such states are often controlled by a few prominent families who pass their influence from one generation to the next.</p>

To the best of my knowledge, the example is created in something like ckEditor, in which the content is composed online, and selected words are highlighted, and a custom control button is clicked to wrap the word with a HTML tag, that provides a pre-selected function or formatting feature.

However, it is done in Javascript, inside the editor during creation. To automatically pick out words, and wrap them in HTML tags, it can be done server side, in which you would have to iterate through the words, find the start and stop of the word position number, and replace the word with an HTML tag wrapped version of the word.

If you need to do it on the server side with raw text, you could check for the word, and do a replace.

if (string.contains("raw word") {
    string.replace("raw word", "<a href="word.aspx">raw word</a>)
}

wiins8-Jun-12 4:46

wiins

8-Jun-12 4:46

thanks jkirkerx, this is on the right track- the search and replace stuff I would do on the server as you suggest- the problem is, what do you put as the href? If I wanted to redirect to another aspx page, it would be easy- but what I really need to do here is to return some data from the server based on what the user has clicked.
e.g. supposing in my html, I had this

<a href="#"  onclick="myFunction('click this')">click this</a>

then 'click this' would appear as a link in the html, and it would call javascript myFunction, sending in the parameter 'click this'.
I then need to go back to the server (maybe using Ajax??) and get some data, which then needs to be displayed on another container in the same webform, i.e NOT in the container hosting the html file from where it was clicked.

What would the javascript call be?

Just to clarify- I have an asp.net webform which has a container (iFrame or Literal maybe- doesn't matter), which shows the contents of an Html file. The user clicks on the link in the html file, and it has to show some other data *in another container* on the web form.

thanks so far...

'cmbGender' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

jkirkerx8-Jun-12 10:53

jkirkerx

8-Jun-12 10:53

wiins wrote:
but what I really need to do here is to return some data from the server based on what the user has clicked.

I would use a span tag because it's inline, and won't change the format of the paragraph text. Many buttons just use a span tag for formatting, and are backed by Jquery or Javascript.

I want to buy a notebook computer today

I want to buy a notebook computer today

Then in JQuery, you add a bind to the class for the click event, pick up the click, get the word, transmit it via $.Ajax to the Web Service, get a response back, figure out what to do.

[Code]: the code is just for conveying the concept, it does not work.

$(document).ready(function () {
    initiateBinding();

    Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);

});

function EndRequestHandler(sender, args) {
    initiateBinding();
}

function initiateBinding() {
    //Bind events here

    // Listen for all specialWord Clicks
    $('.specialWord').click(function () {
        var theWord = $(this).html();         // Read text in span tag
        var newPage = runWebService(theWord); // Run Service, get instructions
        window.location = newPage             // You can redirect them
        $(this).empty();                      // Dump text in span tag
        $(this).appendTo("new text");         // change text in span tag
        return false;
    });
}

function runWebService(theWord) {

   // Make your $.Ajax call to the web service
   [edit]: window.location = "newpage.aspx";
   return newPage;
   [3rd edit] take the response, and populate the container using .empty()    .appendTo(" la la la"") to the new container.

   var newText = objB.newText;
   $('newContainer).empty();
   $(newText).delay(250).appendTo($('newContainer'));

}

Like I said, just an idea of one way to do it on the client side, with web services on the server side to make decisions.

modified 8-Jun-12 17:09pm.

mudunurusv30-May-12 23:36

mudunurusv

30-May-12 23:36

I am getting the following error while editing values in a GridView row.I am posting my code and error below.

Error:

SQL

'cmbGender' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value

ASP.NET

     <%@ Page Language="C#" AutoEventWireup="true" CodeFile="CustomerData.aspx.cs" Inherits="CustomerData" %>

<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI" TagPrefix="asp" %>

<!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" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"></asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="Code,Type" ShowFooter="True" 
                OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDataBound="GridView1_RowDataBound" OnRowCommand="GridView1_RowCommand" 
                OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" OnSelectedIndexChanged="GridView1_SelectedIndexChanged">
                    <Columns>
                        <asp:TemplateField HeaderText="Name" SortExpression="Name">
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Name") %>'></asp:TextBox>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:TextBox ID="txtNewName" runat="server"></asp:TextBox>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="Label1" runat="server" Text='<%# Bind("Name") %>'></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Gender" SortExpression="Gender">
                            <EditItemTemplate>
                                <asp:DropDownList ID="cmbGender" runat="server" SelectedValue='<%# Eval("Gender") %>'>
                                    <asp:ListItem Value="Male" Text="Male"></asp:ListItem>
                                    <asp:ListItem Value="Female" Text="Female"></asp:ListItem>
                                </asp:DropDownList>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:DropDownList ID="cmbNewGender" runat="server">
                                    <asp:ListItem Value="Male" Text="Male"></asp:ListItem>
                                    <asp:ListItem Value="Female" Text="Female"></asp:ListItem>
                                </asp:DropDownList>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="Label2" runat="server" Text='<%# Bind("Gender") %>'></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="City" SortExpression="City">
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("City") %>'></asp:TextBox>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:TextBox ID="txtNewCity" runat="server"></asp:TextBox>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="Label3" runat="server" Text='<%# Bind("City") %>'></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="State" SortExpression="State">
                            <EditItemTemplate>
                                <asp:TextBox ID="TextBox4" runat="server" Text='<%# Bind("State") %>'></asp:TextBox>
                            </EditItemTemplate>
                            <FooterTemplate>
                                <asp:TextBox ID="txtNewState" runat="server"></asp:TextBox>
                            </FooterTemplate>
                            <ItemTemplate>
                                <asp:Label ID="Label4" runat="server" Text='<%# Bind("State") %>'></asp:Label>
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Type" SortExpression="Type">
                            <EditItemTemplate>
                                <asp:DropDownList ID="cmbType" runat="server" DataTextField="Type" DataValueField="Type">
                                </asp:DropDownList>
                            </EditItemTemplate>
                            <ItemTemplate>
                                <asp:Label ID="Label5" runat="server" Text='<%# Eval("Type") %>'></asp:Label>
                            </ItemTemplate>
                            <FooterTemplate>
                                <asp:DropDownList ID="cmbNewType" runat="server" DataTextField="Type" DataValueField="Type">
                                </asp:DropDownList>
                            </FooterTemplate>
                        </asp:TemplateField>
                        <asp:TemplateField ShowHeader="False">
                            <EditItemTemplate>
                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update"
                                    Text="Update"></asp:LinkButton>
                                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel"
                                    Text="Cancel"></asp:LinkButton>
                            </EditItemTemplate>
                            <ItemTemplate>
                                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit"
                                    Text="Edit"></asp:LinkButton>
                            </ItemTemplate>
                            <FooterTemplate>
                                <asp:LinkButton ID="LinkButton3" runat="server">AddNew</asp:LinkButton>
                            </FooterTemplate>
                        </asp:TemplateField>
                        <asp:CommandField ShowDeleteButton="True" />
                    </Columns>
                </asp:GridView>
            </ContentTemplate>
        </asp:UpdatePanel>
      </div>
    </form>
</body>
</html>

    using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class CustomerData : System.Web.UI.Page
{
    CustomersCls customer = new CustomersCls();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FillCustomerInGrid();
        }
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
       
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {

        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            DropDownList cmbType = (DropDownList)e.Row.FindControl("cmbType");

            if (cmbType != null)
            {
                cmbType.DataSource = customer.FetchCustomerType();
                cmbType.DataBind();
                cmbType.SelectedValue = GridView1.DataKeys[e.Row.RowIndex].Values[1].ToString();

            }

        }

        if (e.Row.RowType == DataControlRowType.Footer)
        {
            DropDownList cmbNewType = (DropDownList)e.Row.FindControl("cmbNewType");
            cmbNewType.DataSource = customer.FetchCustomerType();
            cmbNewType.DataBind();
        }
       
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        FillCustomerInGrid();

    }
    
    private void FillCustomerInGrid()
    {
        
        DataTable dt = customer.Fetch();


        if (dt.Rows.Count > 0)
        {
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
        else
        {
            dt.Rows.Add(dt.NewRow());
            GridView1.DataSource = dt;
            GridView1.DataBind();

            int TotalColumns = GridView1.Rows[0].Cells.Count;
            GridView1.Rows[0].Cells.Clear();
            GridView1.Rows[0].Cells.Add(new TableCell());
            GridView1.Rows[0].Cells[0].ColumnSpan = TotalColumns;
            GridView1.Rows[0].Cells[0].Text = "No Record found";
        }
    }
}

Please help me to solve this error.Thanks in advance

Re: 'cmbGender' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value

Sandeep Mewara31-May-12 0:43

Sandeep Mewara

31-May-12 0:43

mudunurusv wrote:
<asp:DropDownList ID="cmbGender" runat="server" SelectedValue='<%# Eval("Gender") %>'>
<asp:ListItem Value="Male" Text="Male"></asp:ListItem>
<asp:ListItem Value="Female" Text="Female"></asp:ListItem>
</asp:DropDownList>

Error must be here.

You have defined two values for this dropdown - Male & Female.
Based on the error, your datasource field "Gender" at some time has any other value than above two. May be empty! Check what all values are coming.

Sandeep Mewara
[My last tip/trick]: Server side Delimiters in ASP.NET[^]

Gridview in Repeater

zeeShan anSari30-May-12 4:33

zeeShan anSari

30-May-12 4:33

Hi All,
let's suppose

DataSet ds = new DataSet();
ds.Tables.Add(datatable1)
ds.Tables.Add(datatable2);

Repeater1.DataSource = ds;


 <asp:Repeater ID="Repeater1" runat="server">
 <ItemTemplate>
<asp:GridView ID="GridView1" runat=server   DataSource="?????" AutoGenerateColumns=true >
 </asp:GridView>
    </ItemTemplate>
    </asp:Repeater>

then what would be the DataSource="?????" in gridview.
Thanks,

Sandeep Mewara30-May-12 10:17

Sandeep Mewara

30-May-12 10:17

zeeShan anSari wrote:
Repeater1.DataSource = ds;

Is incorrect. If you have a System.Data.DataSet with multiple tables as a datasource, you must specify which table to bind to the control.

Either:

Repeater1.datasource = datatable1
//OR
Repeater1.datasource = ds.Tables[0]

Same thing for GridView too.

GridView1.datasource = datatable1
//OR
GridView1.datasource = ds.Tables[0]

Details here:
MSDN: Repeater.DataSource Property [^]
MSDN: BaseDataBoundControl.DataSource Property [^]

Sandeep Mewara
[My last tip/trick]: Server side Delimiters in ASP.NET[^]

Apocalypse Now31-May-12 15:17

Apocalypse Now

31-May-12 15:17

I don't think so.
should:
DataSource=Repeater1.DataSource

Sandeep Mewara31-May-12 16:42

Sandeep Mewara

31-May-12 16:42

???

Sandeep Mewara
[My last tip/trick]: Server side Delimiters in ASP.NET[^]

Apocalypse Now1-Jun-12 15:19

Apocalypse Now

1-Jun-12 15:19

DataSource connect Database ,
Not table.

wikizhao31-May-12 22:26

wikizhao

31-May-12 22:26

put ul li in it Repeater,

that can Meet your needs！You try!