Asp.net - If No Value Selected From Dropdown, Allow Textbox To Add To Database?
Sep 26, 2011
I have a dropdown list that will add new titles to my database, however I would like to add a textbox that will allow the user to type in a new title if there is nothing in the dropdown that makes any sense for what they are trying to add.
I have the dropdown dynamically getting titles from the database. Unfortunately, this means that the first value in the dropdown list is not a default that says "Select an option." I don't know how to get the dropdown to have the first option listed as "Select" when the values are being pulled from the database. I can't add Select an option to the database so how would this even work?
What can I add to my codebehind that will allow the textbox to insert into the database if the dropdown list is not inserting anything? Right now I don't have any codebehind for the textbox but I do have the dropdown list inserting the correct information.
<li class="alternatingItem">
<asp:LinkButton ID="DescButton" runat="server">Description</asp:LinkButton>
<asp:Panel ID="DescPanel" runat="server" CssClass="modalPopup" Style="display:none">
<div class="PopupHeader">Add a Description</div>
[code]....
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Nov 12, 2010
I am trying to get a value for a textbox from a database according to the selected item in combobox. but i had this ex.message " there is no row at position (0) "i have filled the combobox droplist from the same database table as below!
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim connstrg As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & "Data Source=C:Documents and SettingshedrisMy DocumentsREGISTER.mdb;"
Dim conn As New OleDbConnection(connstrg)
[code]....
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Dec 16, 2010
I have two textboxes and 1 button ...
i m doing when i enter travel id in textbox1 and click on button1 then in textbox2 i retrieve the travel agency name according to the travel id i entered in textbox1,
I want when no record is found according to the travel id i entered in textbox1 then in textbox2 it shows the message no record found ...
this is coding i use to retrieve record in textbox2 by enter travel id in textbox1 : have a look ...
re-edit this code according to my query above :
Protected Sub Button4_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim SQLData As New System.Data.SqlClient.SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|ASPNETDB.MDF;Integrated Security=True;User
[Code]....
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Apr 22, 2009
Check this code. Here I populated Dropdown with volumenames from webconfig file. Here I am getting volumename from webconfig file and in page load event I want to show this volumename selected.
'page load
Dim volumeName As String = ConfigurationManager.AppSettings("VolumeName")
Dim index As String
If Me.ddlVolume.Items.Count > 0 Then
'DropDownListName.Items(DropDownListName.SelectedIn dex).Value
[Code] .....
Here I am getting the error: Conversion from string "TEST" to type 'Integer' is not valid.
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Feb 3, 2012
I have an asp.net dropdown like this
<asp:DropDownList width="95%" ID="RessourceComposantes" runat="server"
DataSourceID="Composantes"
DataTextField="Description" DataValueField="ComposanteID">
</asp:DropDownList>
[code]....
Is it normal that when I do dd_ressource_composante.selectedvalue on the server side I have no value. It's always "". the source looks like this :
<select name="ctl00$Tab$dd_ressource_composante" id="ctl00_Tab_dd_ressource_composante" style="width:95%;">
<option value="1">Composante</option>
<option value="3">DGAG</option>
[code]....
I just tried to fill my dropdown in vb.net and I have the same result. The dropdown is full but when I do a postback I have no selected value Actually on the server side when I put a breakpoint on the dropdown, the item count is 0. I don't understand why... It's like the 8th dropdown list in this project and everything is the same but this one doesn't work.
I don't do any binding on the page load. it's all in the aspx file well it works ONLY when I add autopostback="true" SelectedIndexChanged="dd_ressource_composante_SelectedIndexChanged" for the dropdown.And theres no code in dd_ressource_composante_SelectedIndexChanged It's vb.net for the server side?
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Oct 13, 2009
doing dropdown list selected index changed. I wan to select an item in dropdown list and display in textbox but I got more than 1 textboxes. Is the style sheet (.css) going to hard code by our own. how do I go about starting with it as I am a beginnner using visual studio.
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Apr 2, 2012
I am having trouble using the values that were selected from the dropdown list. How would you reccommend passing the selected values from the view?Ideally, we want to use the selected dropdown values to determine a query.
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Jan 29, 2010
search a sql database as write in a textbox, filter datagridview and populate textboxes with selected dgv row
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May 29, 2009
I know the question is a little choppy and perhaps misleading,but I have a gridview with dropdownlists on the rows. I created an AddHandler and a Delegate for the SelectedIndexChanged and it gets to the sub. Here is the code for that:
AddHandler ddlmgr.SelectedIndexChanged, AddressOf ddlmgr_SelectedIndexChanged
Public Delegate Sub DropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As DropDownList_SelectedIndexChanged)
Protected Sub ddlmgr_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
End Sub How can i get the row's Id if GridView_RowCommand is not called?
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Oct 21, 2011
I have three dropdowns, which are all loaded in the same function. How do I grey out dropdown 2 & 3? I want them to activate if a certain choice is made on dropdown 1.
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Mar 7, 2010
I have a comboBox that is populated with a dataset. The values are:
KG - Kilograms
LB - Pounds
and so on.
So when the user clicks the comboBox in the DropDown the user will see:
KG - Kilograms
LB - Pounds
and so on.
[Code]...
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Feb 21, 2010
I have a combo box that has a drop down list with long values in the drop down
Ex:
LB - Pounds
GR - Grams
When the user selects on of the values I want to just show the Abreviaqtions and not the descriptions. So when the drop down is shown it shows
LB - Pounds
GR - Grams
When the user selects "GR - Grams" from the drop down list "GR" is the only this shown in the combobox. I've tried TextChange,SelectedIndexChange and SelectedValueChange but I can't get them to work.
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Jun 8, 2012
VB.NET Winforms Application... When a user starts typing in the search box of the application it automatically populates the name list dropdown box with the valid results and sets the droppeddown value to true... Everything is working fine except the fact that the user is forced to select a value from the name list or press the esc key because without doing so the mouse cursor just disappears and you have to move the mouse all the way outside the application for it to come back and it will only do so while outside the applicaiton.. Below is the code that I am using for this and it should be noted that I am using the droppeddown value else where in the application and none of those instances have an issue its only this one..
Private Sub u_lastName_Box_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles u_lastName_Box.TextChanged
u_nameLook_Box.Items.Clear()
[Code]....
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May 15, 2010
the dropdown list is showing data from database, but how to retrieve the selected value and store it in a session variable??
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Mar 10, 2010
I want to Update Column of a Table where ColumnName will be DropDown.SelectedValue.Example: A set of RECORDS will be displayed from a Customer Table where CUstNo ='1234' and City= 'Chicago' and Grade ='B' Once displayed I want to Update the grade to 'A' of all those customers from the above criteria. In My case I have like 100 Columns, so in where Clause Column Names will be selected from a DaropDown.In My Query, Update Customer SET ColumnName= 'some value' where ColumnName ='ActualValue'So how can I pass the ColumnName which is Dropdown Selected Value. I believe I can't give as Update Customer SET DropDown.SelectedValue = 'some value' where DropDown.SelectedValue ='ActualValue'
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Dec 28, 2009
I am limited for space on my form. Is there a way that I can have a textbox act like a dropdown? So the form will show as one line. If the user starts typing multiple lines then it opens the drop down so they can see what they have typed. Will it have all of the same goods as a textbox, like copy and past? When they are not typing then it will be closed and only showing the first line.
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Feb 19, 2010
auto complete dropdown/textbox (asp .net/vb)
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Feb 18, 2010
I (think I) want to develop a custom control for my program in VB .net where I type into a textbox and simple search results will then be displayed underneath it (from a predefined set of items). Like auto suggest in google search.I believe the combobox does something similar to this but I think it only works on prefixes.At the moment I have a separate search form from which I use to filter a lot of possibilities and then use drag-and-drop to get the desired item into a TextBox.So ideally I want to combine this with a TextBox into which one can start typing at which point some results will be displayed and a user can select the item they want. (Say, an item from a list of products)
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Jan 29, 2009
see what i have done wrong here?
Dim Formview3 As FormView = CType(FormView1.FindControl("FormView3"), FormView)
Dim dropdownlist1 As DropDownList = CType(Formview3.FindControl("DropDownList1"), DropDownList)
[code].....
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Feb 11, 2010
I am building an app. that needs some input from the user, the user will have to move a (selected textbox) by clicking a button. The TextBox will have to move 20 points down or up from corent location by clicking a button.
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Feb 27, 2010
this is my code -
[Code]....
this shall populate the dropdownlist data, but in the value i need it to pick up the "ID" field from the stored proc. the stored proc sends two parameters, ID and Name. so i populate name, but how do i populate the id in value like this -
[Code]....
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Oct 4, 2009
I want to retrieve value from database.........I have a sql table with (Username [Primary Key] , Friends, dob, contact ) columns; table name is MyFriends
Now Code is......
string qry = "select Friends from MyFriends where UserName='hrs'";
da = new SqlDataAdapter(qry, connection);
[code]....
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Sep 3, 2009
I have a list of servers in the first dropdown. I want to get list of all databases in the second dropdown depending on the server selected in the first dropdown.
For this I need to query each server while selecting the server.
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Mar 30, 2011
How to query a record in vb.net using combo or textbox via linq to sql like the search engine? Just like when you search in google or youtube, once you typed in the initial string on the textbox or combo box it will show a drop-down list. I tried to use it in my application using linq method but the problem is it would duplicate on the first string that you entered on the dropdown list if that record exist on your database after you press the space key. I used the code below which duplicates the records on the drop-down list when you type in your string after the space key.
I just want it to be like in any search engine that when you type in the string or your initial string, it will display on the drop-down list all the records from the database that contains the string you entered without duplication. In my case, I'm trying to query a name from my database. This is how it should work, For example, if you type an initial string in the textbox or combo box a named 'Mark', it should display all the names from the database containing 'Mark' into the drop-down list before it changes into its final string that you entered.
Here is the codes I used:
Private Sub ComboBox1_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles
ComboBox1.TextChanged
Dim db As New MultipleDatabaseOperationDataContext
Dim search As String
search = ComboBox1.Text
[Code] .....
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Feb 24, 2012
I am developing an application in visual basic 2008. I want to populate a drop down list onthe fly with values extracted from the database. I want both the displayed and value items to come from the same.
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May 29, 2009
I have created an access database which i want to search with vb.net, I tried a few thing but it didnt work as desired.
Firstly the program is suppose to display items in the database base on the criteria selected by the user. what i've succefssfully done so far is I've added a datagrid 2 combobox, 1 (searchcbo) with the columns in the database and the other (searchcbo1) will autoload the items under the column selected in and a button (searchbtn) but i have no clue of the code to put in the button. i also tried the fill method but that didnt work as i wanted to. ultimately i want a combobox with the list of columns and a textbox to enter criteria and of course a search button.
The searchbtn should act as the "WHERE" sql command, e.g. SELECT EmployeeNumber, Firstname, LastName, Phone, Location....etc FROM CallLog WHERE searchcbo.text = searchcbo1.text And display the results in the datagrid.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'CallLogDataSet.CallLog' table. You can move, or remove it, as needed.
Me.CallLogTableAdapter.Fill(Me.CallLogDataSet.CallLog)
[CODE]....................
Attached image(s)
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Aug 29, 2009
This is the code that i did to fetch data from the database and filling it to the combobox dropdown list at the form load event:
[Code]....
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Oct 19, 2009
I have an MdiParentForm with a big amount of MdiChildForms, and I need to get the active Textbox in the Active MdiChildForm to perform copy/cut/paste/clear functions on from a dropdown menu on the MdiParentForm.How can I do this?
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Jul 5, 2009
How would I go about checking if a control (in this case a textbox) is selected? I have searched Google as well as gone through all of the possible functions and still found nothing. I know it's relatively easy as I've seen it done before but I can't remember how.
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May 30, 2010
I'm using Visual Studio 2005 and Mysql as my Database. Just wanted vb.net code to load data from datagrid to textbox.
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