List Invalid Emails In A Gridview?

Mar 19, 2010

I have a database that contains over thousands of email addresses. I want to create a seperate gridview that lists out invalid email addresses. If there is a DNS lookup then even better!

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Is it possible to remove the bad email id's within a string:

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Aug 20, 2010

I have a Cascading drop down list that is working fine to load the correct lists however I would like to have the last one initiate a query and display a datagrid on the same page containing the results of the query. Without Ajax involved this seems rather easy by using autopostback on the drop downs. If I could do it through Ajax that would be great but I can settle with having the page to reload to display the data. Right now I'm not sure how to do either. I enabled autopostback on the last drop down and wrote a method for it but I get an error at runtime saying:

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Drop Down List Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List Of Items

Mar 25, 2011

I am getting this error yet I know it to be untrue.This is the code:

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Sending Individual Emails To List In Db?

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We were just asked to create something that would query a db and send an individual email to each email returned in the query.

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I have an application that sends mails with Gmail SMTP server (smtp.gmail.com) using SSL.

Now I want to read the emails from that account, does anyone have how can I make this programatically in C# and ASP.NET?

At this point I'm using this code:

[Code].....

And when I debug it it's shows that it's connected but no response in retrieving emails.

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Trying to validate a comma-separated email list in the textbox with asp:RegularExpressionValidator, see below:

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[code]...

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DDL Selected Value Which Is Invalid Because It Does Not Exist In List Of Items

Mar 15, 2016

I am attempting to load a page to edit previously saved info from a SQL2008R2 database. When a drop down index changes, it is supposed to load the existing data from a table. Most fields work OK, but drop down lists throw the error. The list is bound to a different database and table from the existing data that is to be edited (if that makes sense). So, when the data is called for editing, that comes from tableB. The drop down list is bound to a different data source, tableA. When the initial data entry was done, the item exists in the table, so I fail to see why this error is thrown. There are many dealing with this symptom, and I have tried many proposed solutions with no good result. Here's the code that retrieves the data and throws the error...

ASPX code:

Code:
Product Brand Name: <asp:DropDownList ID="product" runat="server" AppendDataBoundItems="True" DataSourceID="SqlDataSource19" DataTextField="Brandname" DataValueField="Brandname" AutoPostBack="true"><asp:ListItem> </asp:ListItem></asp:DropDownList>  

The SQLDataSource19 is from tableA.
VB:

Protected Sub DropDownList6_SelectedIndexChanged(sender As Object, e As EventArgs) Handles DropDownList6.SelectedIndexChanged
Dim conn As New SqlConnection("Data Source=server;Initial Catalog=database;User ID=user;Password=password")
Dim cmd As New SqlCommand
Dim reader As SqlDataReader

[Code] ....

The data is bring called from tableB. The error is getting thrown on the product.selectedvalue line..I think I understand the problem, but I am not sure how to resolve it.

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AJAX :: 'dropdownlistArea' Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List?

May 18, 2010

I am gettng the above error when I am using the Cascading Dropdown list in a DNN application. Everything works 100% until I try to post the form to the db then the error is thrown.I have attached the relevent code

[Code]....

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Web Forms :: DropDownList Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List Of Items?

Mar 5, 2010

I have a page with some bound DropDownLists (DDLs) for a Call Logging system. The Calls are categorised on three levels for example:

Call: 3069, Category 1: Incident, Category 2: Microsoft Application, Category 3: Word would be used to organise calls for problems with Microsoft Word. On testing the system, I noticed that there was no handling for opening a call if the category had been deleted - say for reorganisation/systems no longer supported whatever. So I set about trying to make the program behave in the following manner:

Check category ID exists in DDL before bindingIt doesn't: set the displayed text of the DDL to Category Name + "(Deleted)"Disable the control to prevent user changingMove on to next control Seemed simple enough, however no matter which way I try and do it I always get the messase ddl_Cat1 has a SelectedValue which is invalid because it does not exist in the list of items. What's really puzzling me is that the exception doesn't seem to be being thrown in the code behind. I've gone through line by line from Page_Init and it never throws and exception. Just when the page loads this appears.

Does anyone know of a reason as to why this wouldn't work? (I've already tried setting the selected value to an existing item, adding a new list item with the value and setting DataSource property to Nothing - in all different combinations.)

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'cmbslot' Has A Selectedvalue Which Is Invalid Because It Does Not Exist In The List Of Items Parameter Name Value

Mar 7, 2010

i try to fetch the data from the database and display text in the dropdownlist

i got the error message

'cmbslot' has a selectedvalue which is invalid because it does not exist in the list of items parameter name value cmbslot.Text = obj.getdata(dr["slotcode"].ToString()); //here is my code to retrive the data from the database

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Data Controls :: DropDownList Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List

Jun 9, 2013

Before this, everything is fine when running the project After I've put "SelectedValue" below to the field,

<asp:TemplateField HeaderText="Interest">
<ItemTemplate>
<asp:DropDownList ID="ddl" OnSelectedIndexChanged="ddl_IndexChanged" SelectedValue='<%# bind("int_id") %>' AutoPostBack="true" runat="server">
</asp:DropDownList>
</ItemTemplate>

[CODE]

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Forms Data Controls :: 'DropDownList1' Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List Of It?

Jan 24, 2011

We use gridview for showing a data from table.It show fine in certain case like in table field dispostion is data and test but in table we put the string Ineligible Member/Member No Longer Enrolled - Spoke to Target and Wrong Number After Skip Tracing then it gives error. 'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.

The following is snippest my code ,tell me where i am wrong.

[Code]....

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Forms Data Controls :: 'DropDownList6' Has A SelectedValue Which Is Invalid Because It Does Not Exist In The List Of It?

Oct 5, 2010

In my asp.net page I have a formview. In the formview's InsertItemTemplate I declare a dropdown list as below:

<td>
<asp:DropDownList ID="DropDownList6" runat="server" text='<%# Bind("District") %>'
DataSourceID="SqlDataSource6" DataTextField="District"
DataValueField="District">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource6" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [District] FROM [tblDistricts]"></asp:SqlDataSource>
</td>
and this works perfectly fine.
In the EditItemtemplate I declare a similar dropdownlist as below to edit district values:
<td>
<asp:DropDownList ID="DropDownList6" runat="server" selectedvalue='<%# Bind("District") %>'
DataSourceID="SqlDataSource6" DataTextField="District"
DataValueField="District">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource6" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [District] FROM [tblDistricts]"></asp:SqlDataSource>
</td>

But whenever I try to edit the data I get the error:

'DropDownList6' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value And the values I am trying to edit were entered into the table by the dropdownlist declared in the insertitemtemplate dropdownlist6 listed above. And no values were deleted from the table.

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Data Controls :: DStation Has SelectedValue Which Is Invalid Because It Does Not Exist In List Of Items

Dec 17, 2013

How to solver this error? I am getting error for "DropDown"

Error: 'DStation' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value on line: DStation.DataBind();

My .cs code is below

string CommandText = ("select distinct StationName from stations where DeletionDate is null");
DStation.DataSource = DataManager.DatabaseManager.GetOrCreateConnection
(DataManager.DatabaseManager.ConnectionType.MySQL).GetData(CommandText);
DStation.DataTextField = "StationName";

[Code] .....

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Data Controls :: DropDownList Has SelectedValue Which Is Invalid Because It Does Not Exist In List Of Items

May 7, 2015

I got this error when select a row from a grid view to update

'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentOutOfRangeException: 'ddl_ctegOf_Product_update' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value

Source Error: 
Line 265: txt_prodID_update.Text = gridTo_updateFrom.SelectedRow.Cells[1].Text;
Line 266: txt_prod_name_update.Text = gridTo_updateFrom.SelectedRow.Cells[2].Text;
Line 267: ddl_ctegOf_Product_update.SelectedValue = gridTo_updateFrom.SelectedRow.Cells[3].Text;
Line 268: txt_cateIn_hardCopy_update.Text = gridTo_updateFrom.SelectedRow.Cells[4].Text.Replace(" ", "");
Line 269: txt_prodID_update.ReadOnly = true;

The code of update:

 private void PopulateDropDownList() {
string constr = ConfigurationManager.ConnectionStrings[1].ConnectionString;
using (SqlConnection con = new SqlConnection(constr)) {
using (SqlCommand cmd = new SqlCommand("SELECT CategoryProd_ID,Cate_Pro_Name FROM CategoryOfProduct", con)) {
using (SqlDataAdapter da = new SqlDataAdapter(cmd))

[Code] .....

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AJAX :: Invalid Postback Or Callback Argument (using Cascading Dropdown List Controls)

Oct 12, 2010

i use cascading dropdown lists (in a user registration form) and when the user hits the submit button i get the error: "Invalid postback or callback argument" I've seen on the net that this is a problem dating back many years but still haven't found a solution to this. I've read about changing EnableEventValidation to false, but this poses a security risk.

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Data Controls :: Dropdownlist Error - SelectedValue Invalid Because It Does Not Exist In List Of Items

Feb 24, 2013

I want to update the data using vb.net , my webpage has many dropdownlistlist ,

I got an error when update the dropdown field ,

"Dropdownlist error: SelectedValue which is invalid because it does not exist in the list of items."

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Security :: Windows Live Delegate Authentication And Emails / Access Emails (New, Read, Unread Etc) from Live Account?

Mar 21, 2011

I am able to get a token with Windows Live Delegate Authentication samples provided by Microsoft.

Now I want to access emails (New, Read, Unread etc) from live account. How can I achieve it with the help of Windows Live Delegate Authentication? Are there any examples for the same?

The Samples given by Microsoft are not related to emails.

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Web Forms :: How To Retrieve Emails And Display Them In GridView

Oct 22, 2012

I want to retrive my emails and display it in GridView or in any Data Tool.

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TemplateField Button Causing GridView Invalid Postback?

Jun 3, 2010

I've got a template field in a gridview that contains just a simple button...

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Administration.aspx.cs"
Inherits="Administration" %>
<%@ Register TagPrefix="ajaxToolkit" Namespace="AjaxControlToolkit" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

[Code]....

Whenever I click the button I get the error...

Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

I've found a decent amount of articles referencing this issue, including a couple on SO, for example...

[URL]

and...

[URL]

I might just be misunderstanding, but as far as I can tell they don't really help me. How do I get this to go away without setting enableEventValidation="false"?

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Mar 23, 2011

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Dec 1, 2010

I have a class with all different kinds of data members, including a list of strings. When I bind the data to a GridView, I want to be able to separate out the list of strings into different columns in the GridView. These strings are more like flags, there is a max of 3 flags. The list could be empty, if no flags apply, or it could contain only one or two flags. How can I separate out these flags into different GridView columns? Do I need to do it in the OnRowDataBound event?

Current, my aspx code looks something like this. I want to be able to change the ImageUrl of the Image controls based on if the flag is raised or not.

<asp:TemplateField HeaderText="Tax" SortExpression="Tax"> [code]....

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Gridview With Row Being Edited Causing Error When Form Submitted / Invalid Postback Or Callback Argument

Apr 7, 2010

Using ASP.NET VB, I have a form with some text boxes and a Gridview. If a user clicks the Edit button on a row in the gridview, and then tries to submit the form with a row still in edit mode on the Gridview, this error is generated -

"Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. "

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