VS 2010 - DropdownLists With Datasource To SQL
Dec 16, 2011
On my webform, I have 3 dropdownlists with datasource to SQL. Through dropdownlists, I want the user to fill the controls, so I can get his location. One for his area, subarea, town or village. Actually the values appears great but I dont like when my page loads, the ddl fills with default values and second when I change, lets say the first ddl, it also full fills the rest with the first default values. All I want to do is, load my page with empty values, assign a value at first ddl, the second remains empty til I click on it and select a value and so on.. here is the code i use
HTML Code:
<div id="CreateAccountDiv" style="padding-top:10px">
<%--Label and Textbox for company--%>
<div><asp:Label ID="lblComp" runat="server" Text="επωνυμία επιχείρησης" CssClass="sizeLabel" ForeColor="black"></asp:Label></div>
<div><asp:TextBox style="width:250px;font-size:10pt" ID="txtComp" runat="server" CssClass="sizeText transparent" ValidationGroup="form">
[code]....
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Similar Messages:
Dec 20, 2012
I have it setup so that when a user selects an item from a DropdownList, that some DropdownLists are dynamically created, based on the results from the Database that are returned after selecting the item in the first DropDownList.
Then, I have a button that takes the data and saves it to an object I've created for this, and I try to iterate through the Controls of the Placeholder that I added the DropdownList controls to.
However, the Placeholder says there are no controls in it, when I press the button, but I can obviously see them there.
Here is some code:
When a "Pilot" is selected, I get all of the Upgrade Types that that "Pilot" has access to, then I create a DropdownList for each type of Upgrade with all the actual Upgrades of that Type:
VB Code:
For Each u As UpgradeTypeList In upgrades
Dim lbl As New Label
Dim ddl As New DropDownList
ddl.AutoPostBack = False
[Code] ....
Then, when the "Add Squad Member" button is pressed, I am trying to iterate through the controls, pick out any DropdownLists and get the values from them and add them to a List Of in an object for the Pilot info:
VB Code:
Protected Sub btnAddSquadMember_Click(sender As Object, e As EventArgs) Handles btnAddSquadMember.Click
For Each c As Control In rowUpgrades.Controls
If TypeOf c Is DropDownList Then
Dim DoesExist As Boolean = False
[Code] ....
But, the controls supposedly don't exist and no values get added to the List(Of).
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Jan 30, 2011
i have the following code:
[Code]....
3 nested dropdownlists SELECTing from DB. So i select the brand, then i select the model and then i select the product and click on SEARCH button.
But when i select thebrand, and then the model, and if i want to change the brand, it does not reset the second and third dropdownlists.
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Jun 25, 2010
I want to assign same datasource to multiple DropDownLists in a form, when the page loads, only the first drop down list has filled the content of datasource, others are empty, what's the missing point? Here are the codes;
<form id="form1" runat="server">
<asp:ScriptManager ID="scriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="panel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<div id="div1" align="center">
<table>
<tr>
<td><b>Brand-Model</b></td>
<td><asp:TextBox ID="brandText" runat="server" BorderStyle="Inset"></asp:TextBox></td>
<td><asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="brandText" Display="Dynamic" ErrorMessage="*"></asp:RequiredFieldValidator></td>
[Code]....
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Jul 16, 2010
I'm attempting to hook up multiple DropDownLists to a single SQLDataSource, but I want the SQLDataSource to return different rows depending on which DropDownList it is populating.
Say I have a table full of names (we'll call it TABLE_NAMES):
[code]....
....and I have two dropdown lists, one with a list of person names and one with a list of dog names.
Is there a way to link up each of these dropdown lists to a single SQLDataSource and use the SelectParameter to differentiate between which records I want returned for each dropdown list?
To make matters worse, these dropdown lists will appear within a GridView control....so there will be multiple instances of each dropdown list depending on how many rows there are in the GridView.
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Feb 16, 2010
I want to be able to make a query from three dropdownlists but not all three have to be selected to create results. This is what I have so far :
sub getdata (src as object, e as eventargs)
dim strsql as string
dim myconnection as oledbconnection
dim mycommand as oledbcommand
myconnection = new oledbconnection(ConfigurationSettings.AppSettings("MM_CONNECTION_STRING_csrdb"))
strsql ="SELECT tbl_case.Case_id, tbl_case.Title, tbl_case.Description, Tbl_Country.Country_Name, tbl_principle.Principle_Name," _
& "tbl_keyword.Keyword FROM tbl_keyword INNER JOIN ((tbl_principle INNER JOIN (Tbl_Country INNER JOIN tbl_case ON Tbl_Country.Country_Id
tbl_case.country) ON tbl_principle.Principle_ID = tbl_case.Principle) INNER JOIN tbl_Usedkeywords ON tbl_case.Case_id
= tbl_Usedkeywords.case) ON tbl_keyword.Keyword_id = tbl_Usedkeywords.keyword " _
& "WHERE "
if DLPrinciple.selectedindex=0 then
strsql = strsql & "((tbl_principle.Principle_Name) like '%')"
else
if DLCountry.Selectedindex=0 then
strsql = strsql & "((tbl_country.country_Name) like '%')"
else
if DLKeyword.selectedindex=0 then
strsql = strsql & "((tbl_keyword.Keyword) like '%')"
else
strsql = strsql & "((tbl_principle.principle_Name) = '" & session("infoprinciple") & "')" + "((tbl_country.country_Name) = '" & session("infoland") & "')" + "((tbl_keyword.keyword) = '" & session("infokeyword") & "')"
end if
end if
end if
This is working perfectly with only one dropdownlist but I can not figure out how to make it work with several.
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Jun 25, 2010
I'm wondering how I can make one dropdownlist affect another one.. For example...You select your country from a drop down list of countries. On selecting it, another dropdown list becomes visible and displays the states of your country. I'm taking this data from a database, so it merely has to link to a different table for each country selected.
Also, I want the option of being able to add a 'state' to the database from the webform by typing whatever its called into the combobox so that future users will see that option.
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Jul 31, 2011
I have a DataView that is bound to a DataSource, which gets its data from a SQL database.I'm converting a desktop app to a web app and I've been able to duplicate the data query side, but I'm having a hard time inserting a new record via the data source. In the desktop app, I don't use a data source. I have a class I created that inserts a new record, but the upkeep is extremely time consuming, so I'm switching to the datasource.When I assign the datasource, I selected the SQL statement/stored procedure option and created my INSERT command via the Query Builder.
The problem I'm running into is that I don't want a SELECT statement. I just want a plain GridView so I can select Edit, fill in the data and then call InsertParameters.If I don't add a SELECT statement, it won't let me finish the wizard and an invalid one throws an exception. The only other thing I could think of, was to call SELECT and set a WHERE based on a column whose value is null. The app runs, but the GridView doesn't appear. How I can only do an INSERT?
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Dec 19, 2010
I've written this code to display a group of events when the value is 12/19/2010. This means each day I need to change the "default value" to the current date to display the events of the day. I would like to make this such that the change occurs automatically, that is, on 12/20/2010, I'd like to see just the events for 12/20/2010.
<asp:SqlDataSource ID="testeventdate" runat="server" ConnectionString="<%$ ConnectionStrings:testdateConnectionString %>" SelectCommand="SELECT [eventDate], [eventDesc] FROM [programEvents] WHERE ([eventDate] = @eventDate)">
<SelectParameters>
<asp:querystringparameter DefaultValue="12/19/2010" Name="eventDate" QueryStringField="eventDate" Type="DateTime" />
</SelectParameters>
</asp:SqlDataSource>
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Feb 28, 2012
I am using a custom membership provider. I needed to bind a repeater to a membershipusercollection but the only way I could think of was this:
There is no method to return a lcollection of membership users by userid. I basically have a friends table with a userid and a frienduserid field. both are foreign keys to the user table. So say I am userid 1 and I have two friends userid 2 and userid 3.
I needed to get a collection of membership users who are my friends (user 2 and 3)
So I did this:
Code:
Dim lstAccountIDs As List(Of Integer) = bl.GetFriendsAccountByUserID(iUser)
Dim mUsers As New MembershipUserCollection
For Each a In lstAccountIDs
mUsers.Add(Membership.GetUser(a))
Next
I get their id's and add them to to list(of Integer) then I loop through the list and get the particular user by id and add them to a membershipusercollection object.
I now need to add paging to my repeater control that uses that collection as a datasource. However the membership provider doesn't give me the ability to specify a pageindex or pagesize etc. It gives me those options in the GetAllUsers function but I need it to work in the above scenario.
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Jun 23, 2011
I have a Gridview that displays some data I am pulling from a SQL Server database. The stored procedure that runs the query accepts a table valued parameter. I am unable to find a way to pass this structure to an asp:SQLDatasource so I have been manually creating the datatable and then binding my Gridview to it. The DataType I am using in the code-behind to pass into the stored procedure is a System.Data.SqlDbType.Structured type.
Each Gridview row has an asp:LinkButton with a CommandArgument value that looks like
<%# Eval("PartNumber").ToString() + "|" + Eval("ID").ToString() %>
Each LinkButton calls back to a function in my code behind that accepts the CommandArgs, does some work, and redirects the user to another page.
Since I am manually binding the Gridview to the Datasource when the number of records exceeds my paging size and the user changes pages or sorts the Gridview, the CommandArgument value changes to the wrong row and I get bad data back from the CommandArgument. how to pass a System.Data.SqlDbType.Structured type into an asp:SQLDataSource but if that is not possible how I can work around this?
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Jul 8, 2010
Everytime I try to create a new sql 2005 server project I get this error. Then after I hit ok VS 2010 crashes.
Could not load file or assembly 'System.Data.SqlServerCe, Version 3.5.1.0, Culture=neutrail, PublicKeyToke=89845dcd908080cc91' or one of it dependencies. The system cannot find the file specified
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Apr 12, 2010
How can i use editorfromodel and dropdownlists that are to be populated by tables in my model? Seems i can use custom templates to format the major datatypes like datetime, string etc but i how can i manage select lists or dropdowns since i cant pass classes into editorformodel..
Is there a way to force a particular field to be formatted as a dropdownlist in editorformodel?
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Feb 20, 2010
I'm using a code I got from CodeProject [URL] about a validator that can monitor 3 form controls. I pasted it to my site, changed it to suite my parameters but seem to encounter a situation that can't satisfy my desire: Instead of making sure that all the 3 DropDownLists are filled without their default value, the validator cares only if at least one has been filled, and if so, he can call it a day. look at this code at tell me what am I doing wrong?
[Code]....
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Aug 5, 2010
I have to generate multiple dropdownlists on clientclick. That is new dropdownlists on every client click.
I placed a button and wrote code on click event. protected void addReq1_Click(object sender, ImageClickEventArgs e)
{
DropDownList oDdl = new DropDownList();
oDdl.ID = "ddlReq" + (++i).ToString();
oDdl.DataSourceID = "DSUsers";
oDdl.DataTextField = "UName";
oDdl.DataValueField = "UName";
HtmlTableCell tc0 = new HtmlTableCell();
HtmlTableCell tc1 = new HtmlTableCell();
HtmlTableCell tc2 = new HtmlTableCell();
HtmlTableCell tc3 = new HtmlTableCell();
tc2.Controls.Add(oDdl);
HtmlTableRow tr = new HtmlTableRow();
tr.Cells.Add(tc0);
tr.Cells.Add(tc1);
tr.Cells.Add(tc2);
tr.Cells.Add(tc3);
search2.Rows.Add(tr);
}
Here "DSUsers" is SqlDataSource. "i" is static variable. "serarch2" is html table with runat server tag The problem is only one control is getting rendred, after that on every additional click same DropDownList is getting replaced. No new DropDownList is added to the page.
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May 17, 2010
I have created a label and a dropdownlist. The label has the dropdownlist as associated id.If I click on the label and then uses the mouse up or down the dropdownlist creates a postback for each click. This is quite anoying and doesn't happen if you click on the dropdownlist and uses key-up or key-down, or if you uses another browser than IE.Is it possibel to fix this, so you can use key-up and key-down without causing a postback, and first on the enter-key creates the postback (as it does if you click on the dropdownlist and not label)?
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Jul 27, 2010
I am trying to use two DropDownLists (Cities, Categories) in a PartialView that will be used in MasterPage, meaning they will be visble all the time.
I tried to load them in HomeCOntroller, but that didn't work. I got an Exception.
I read something about making a baseController that the other controllers will inherit from, I have tried that, kind of, but I guess i'm doing something wrong.
This is the only code I got today:
Masterpage
[Code]....
PartialView (SearchForm.ascx)
[Code]....
Two question:
Where and how to load the DropDownLists is the problem. I have tried to load it in the HomeController, but when go to another page then it says that the DDLs is empty and I get a Excecption. Why do I have to use two forms for the ActionMethod to trigger ?
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Jun 30, 2010
I have a dropdownlist on my page which has autopostback set to true. On postback I populate a runat server div with a bunch of other DropDownLists. I then have a button which does another postback to save the selections. Because the second set of dropdownlists are dynamically generated I cannot for the life of me figure out how to get their selected values?
1st DropDownList
[Code]....
Then when I try get the dropdownlists using a foreach on the div that I added the control to it does not work. They are populating fine, its just on the button click. I have tried EnableViewState = true on the dropdownlists and my code is correct because if I code them into the aspx then it works, its something to do with the state.
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Mar 10, 2010
I have got 2 Drop Down Lists on my Form and 1 GridView. I want GridView to display the data according to selection from the Drop Down Lists.
For Example, One Drop Down List contains Names and other contains Dates. Both the Drop Down Lists can post back. So if i select a name from 1st Drop Down list, the Grid View should show all the results according to that Name. Similarly if i select the Date from the other Drop Down List , the Grid View should show the results according to the dates. But i cant figure out as how to bind Grid View to respond to 2 Drop Down List.
i am binding both the Drop Down Lists and the Grid View to the DataSource Objects, which is getting data from the database.
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May 31, 2010
I'm trying to generate some dropdownlists trough code. but i can't seem to access them.
[Code]....
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Jul 28, 2010
I have an accordion and a nested accordion as a menu ba on left. thepanes contain various controls mainly dropdownlists. I disable the accordion after a user has enetered some values and clicked the search button. However in IE7 the accordion is disabld and all the contained controls are too. But in IE6 the dropdownlists aren't disabled whats the reason behind this and whats the solution?
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Mar 15, 2010
I'm trying to use two cascading dropdownlists with the same values -- one shows a code, and the other a description. They are sorted alphabetically, so they have the same values, but not the same index. Both are generating correctly. What I am trying to do is set the abbreviation when the description changes (and vice versa).If I use this javascript, it changes on the web page, but I get a null value returned to the form handler. If I comment out the CascadingDropDown control and load the TrickAbbrev from a database it all works.
function scrTrickNameOnChange(ddlId)
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Feb 4, 2011
I have an SqlDataSource at the moment, which I want to be able to be filtered using 3 DropDownList's. Basically, each DropDownList contains values for a certain column on the table, so when they choose one of the values, the SqlDataSource only shows values with that value in the relevant column.
So my table is somewhat like this:
ID (primary key)
ManufacturerID
ItemTypeID
UnitTypeID
And the 3 DropDownList's contain the following:
Manufacturers (value = ManufacturerID)
ItemTypes (value = ItemTypeID)
UnitTypes (value = UnitTypeID)
My filter expression for the datasource is currently like this, but it doesn't seem to work unless all 3 boxes have a value selected, which is not ideal. Any ideas guys? My filterexpression is below:
ItemTypeID = {0} OR ManufacturerID = {1} OR UnitTypeID = {2} OR (ItemTypeID = {0} AND ManufacturerID = {1}) OR (ItemTypeID = {1} AND UnitTypeID = {2}) OR (ManufacturerID = {1} AND UnitTypeID = {2}) OR (ItemTypeID = {0} AND ManufacturerID = {1} AND UnitTypeID = {2})
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Aug 6, 2010
I have a web app with several groups of cascading dropdownlists. All the cascading dropdownlists work as designed, but now the app is in the live enviroment with multiple users they are getting error 500 messages returned in some of the dropdownlists. Just wondered if there is a set amount of time to populate between selections? As these users are sometimes waiting tens of mins betwen selecting the values.On some of the dropdowns i'm pasing a date to the method using session variable whether this could be the issue? an example of one of the methods is below:
[Code]....
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Mar 29, 2011
I have a dynamic (allows addition of rows on the fly) an ASP gridview that has a dropdownlist in one of its columns. I would like to take an action enable/disable the textbox in the column after depending on the selection in the dropdownlist during data entry.
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