Finding DropDownList Index By Text?

Feb 16, 2011

I have a populated DropDownList. How do I find the index whose Text value is "x"?

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I want to get the value of the specified index in a DropDownList

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VS 2010 - Dropdownlist Getting Index

Feb 13, 2013

I've made a small site which purpose is to allow people to add members to their clan. The page has a dropdown list with the names of all available clans.

The name of the clans and the clan password come from a text file which is read when loading the page (but not when there's a page postback) and adds the clans to the dropdownlist.

The clan name and clan password are also read into an array for later use.

When the user selects an item in the dropdownlist I want to get the index so I know which clan name to use and which password.

I tried getting the index by using the indexchanged event and also just the click event of a button but somehow this doesn't seem to be working properly.

When the user filled in all fields and hits the submit button I want to check if the password is correct and want to know the clanname. I'm trying to do this by using the array's with that data and setting the item of the array equal to the index of the selected item in the dropdownlist.

But when I press the button I keep getting a wrong password error even though it's correct. If I remove the password check and submit it then the form should create or append to a text file with the name of the clan. But when submitted the text files is .txt instead of clanname.txt.

Tried setting the dropdown to autopost back or without and get the same result.

My code is the following:

reading the data into the array + adding the clannames to the dropdownlist

vb Code:
Dim data() As String    Dim clanname(50) As String   
Dim clanpass(50) As String Protected Sub Page_Load(sender As Object, e As System.EventArgs)
Handles Me.Load        
Dim fileName As String = "C:/ClientSites/data/clans.txt"       

[Code] ....

The submit button code

vb Code:
Protected Sub btnSubmit_Click(sender As Object, e As System.EventArgs) Handles btnSubmit.Click        
naam = txtMemberName.Text.ToString        gamertag = txtGamerTag.Text.ToString       
platform = txtPlatform.Text.ToString         index = DropDownList1.SelectedIndex        
paswoord = clanpass(index)                    

[Code] ....

In short I load in data from a file into two arrays, clanpass and clanname. Populate the dropdown with the clannames. Then upon submitting I want to check the password against the password for the selected item by using it's index. I also want the name to write it to the correct text file.

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Dropdownlist Selected Index Changed Using C#?

Oct 12, 2010

i have 2 drop down list..first for city and second for state i want to fill the state list when the city is selected...m using the code

protected void Ddl_SelectedIndexChanged(object sender, EventArgs e)
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but nothing is happing on selecting city..i have set the autopostback of is a function which is returning data tablepublic DataTable Select(String sqlQuery)
SqlDataAdapter adapter = new SqlDataAdapter(sqlQuery,con);
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Oct 18, 2010

Iam using a dropdown list ,in that am having 4 values ,the following are my values


and here i need to choose the a particular value as a selected index ,and i did that for a exact value and in my requirement i will pass only the values after that '-' .so that i need get the value to be selected and here am using the following code to select it is not working can any one help for this.


DropList.SelectedIndex = DropList.Items.IndexOf(DropList.Items.FindByValue("L1"));

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how to get the value from a dropdownlist using a index number.

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i have 2 drop down list on my web page

-the first one bound to a sqldatasource and it's work fine

-the second one bound to a sqldatasource (with a parameter depends on the first drop down list selected value )and it's work fine too .

But when a user make a selection on the second drop down list, any post back on the page will return the second drop down list selected index equal to 0.I tried so hard (ON MSDN) to understand why this happen only on this drop down list.

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Web Forms :: Finding Something Like OEvent.cancelPostBack For DropDownList

May 12, 2010

I am having the code for selectedIndexChanged event of a DropDownList in Asp.Net that looks somewhat like this


I know that I can acheive the same objective by tweaking the code a bit, But I am more imterested to know if .NET provides any such implementation.

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Web Forms :: Finding The Matching Dropdownlist Item?

Mar 26, 2010

I want to compare each item in a dropdownlist to a value and if the item matches the value, I want that ddl list item to be 'selected' and showing...

why doesn't this work:


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Im working on an ASP.Net web forms application, where I have a form and the Index is working correctly, until I select a value from one specific control, a dropdownlist. After that no matter what control I am on if I press TAB it will go to the URL/Address Bar, from there to the search bar and then again to the URL bar...

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Dropdownlist Not Changing To New Index Upon Postbacks In Page_load

Jun 7, 2010

i have a user control that includes a dropdown list its actually a page navigator when the user press next page iam setting the index of the selector to the value of a hidden textbox where textbox is filled from javascript function. ex txtbox initially is 1. then when next pressed it is 2 and so on but when doing postbacks i.e pressing next it is not changing the index although in the debuy its showing its setting to the new value. as if there is something that is reseting it to the initial value after the page loads if i put my method in the prerender method its working fine. but in the page_load method its not updating to the new index changed. i need to put it in the page_load method as i have to register some event handlers for the navigator.

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C# - No Change For Index Of DropDownList In A Custom Control?

Jun 15, 2010

I have Created A Custom Control which is a DropDownList with specified Items. I designed AutoPostback and SelectedCategoryId as Properties and SelectedIndexChanged as Event for My Custom Control. Here Is My ASCX file Behind Code:

private int _selectedCategoryId;
private bool _autoPostback = false;
public event EventHandler SelectedIndexChanged;
public void BindData()


But Always The Selected Index of CategoryDDL1 is 0(Like default). this means Only Zero Value will pass to the event to update textboxes Data. what is the wrong with my code? why the selected Index not Changing?

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VS 2008 DropDownList - Selected Index Changed

Jul 12, 2012

I am using SelectedIndexChanged in the DropDowList and it works fine and populates a GridView based upon a site selection.

Is there there a way I can reset the SelectedIndexChanged so if user wants to refresh the GridView they would open the drop down list and click on the same selection again?

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VS 2008 / Unable To Get Selected-index Of DropDownList?

Jan 26, 2012

I am populating a DropDownList from a text file (class requirement).

The file is read in the Page_Load method and the DropDownList is populated then.

When I press the Submit button, throughout the process of the code it is supposed to get the SelectedIndex and use it to grab a value out of a List(Of ).

The thing is, nothing is ever passed through. I even setup an alert box and it passes right over the alert box and never even triggers it, but gives me an Index out of range error when it moves to the line right after the Alert.


Redacted to keep people from stealing classwork.

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Finding The Position Of Text In Pdf?

Feb 11, 2010

Is there any way to find the position of text in pdf.

I tried using pdfClown and ItextSharp,but m not finding any way.

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