I have 2 dropdownlist controls (ddl1 and ddl2). When I pick an item from ddl1, it will update ddl2. The problem is when I pick an item in ddl2, it always selects the first item in the list. Is it that the ddl2 autopostback causes the first ddl1 to reload and results the ddl2 to be refreshed also? Or I didn't set something correctly?
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I have been trying for a while to populate a formview when I select an item from the dropdownlist. The dropdownlist is outside of the formview. For some reason, when I select a different item it does not change in the formview. Only the first item of the list shows up. I don't know where I'm doing wrong. I tried many things and suggested informatioin and I still could not get it to work. When I do try to switch I get this error message:
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
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I have a dropdownlist and a button(btnSend).
protected void btnSend_Click(object sender, EventArgs e)
{
InsertIntoTemporary();
LoadAddressdetails();
MassSendOut();
}
What i need to do is as follows;
1) Once i select the item in the dropdownlist, it will extract data from my sql query which is :
string mySQL = "SELECT * FROM examtimetable WHERE subject_name= '" + dd_cat.SelectedValue + "'";
Once seleted,it will display everything in a gridview1.
subject_id subject_name admission_no date venue seat_no
I used scroll bar fo my dropdownlist
below is code
<asp:DropDownList ID="DDLcity1" runat="server" CssClass="DDlcityE" OnSelectedIndexChanged="DDLcity1_SelectedIndexChanged"
ForeColor="#ca0202" AutoPostBack="true" onclick="onSelectMouseDown()" onfocusout="this.size=1;">
<script>
function onSelectMouseDown() {
document.getElementById("<%= DDLcity1.ClientID%>").size = 10;
}
</script>
problem is :when I select Item from DDL it select Item with delay I want when I select Item from DDL it select it quicly..
i have a gridview which consists of databounds and dropdownlist control. When I press the Add Grid Row Button, it will insert a row. Now my question is, if the user selected an item in dropdownList in the firstrow and the user click the AddGridRowBtn Again which will generate the 2nd row, how would i maintain the selectedItem in the dropdownlist after postback?
Source For Gridview:
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Add Row Code
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And For Grid Row Created Event
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I have a Dropdownlist filled from database. Its datavaluefield has a combination of 2 values from database as :
Select (convert(varchar,DoctorID)+'*'+Ltrim(RTrim(DoctorAddress))) as DoctorIDAddress
ddlDoctorName.DataValueField = "DoctorIDAddress"
now while updating the form i want to select value in dropdown list with a combination of two values from database table.
ddlDoctorName.SelectedValue = Securities.HTMLEncode(dr("ReferredByDoctorID").ToString()) + "*" + Securities.HTMLEncode(dr("RefAddress").ToString.Trim)
but when i HTMLCode my Address field and it has '&' saved in it, then it encodes it as '&' and ddl don't have selected value.
so , is there any way to select an item value from ddl using like operator or other :
ddlDoctorName.SelectedValue = Securities.HTMLEncode(dr("ReferredByDoctorID").ToString()) + "*" +"%"
I have some textbox and Dropdownlist in my page and bind it from database
BindDropDownList(DDL3, "Guidcenter", "Centername","id");
DDL3.Items.Insert(0, new ListItem(" please select ", "0"));
I have button in my page that when user click on it insert data into database
Here when users didn't select Item from dropdownlist it insert "please select" ( text that I define for DDL ) into database but I want when users didn't select Item from database it insert NULL in database....
protected void ImageButton2_Click1(object sender, ImageClickEventArgs e) {
string data = Server.UrlDecode(Request.QueryString["BehCode"]);
SqlCommand _cmd = new SqlCommand("insertinfo", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
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I have a dropdown populated with data , based on a true / false condition i change the dropdown item color when dropdown gets loaded initially the item color are proper based on condition. but if i select a particular item & then again click on dropdown the item color disappear show to retain the item color.
View 1 RepliesURL.... When I wrote this code in other page with different SP It didn't worked correctly I change SP in new SP I used INSERT code instead of UPDATE now when users didn't select Item from ddl3 it insert 'please select' in table these are my code
protected void ImageButton2_Click1(object sender, ImageClickEventArgs e) {
SqlCommand _cmd = new SqlCommand("insertSreg", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
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I have a project that queries a set of times from a database and uses these entries to populate a dropdownlist. Once the page is loaded, the user can select one of the items in the DropDownList. When the "Save" button is clicked, the Selected item value is returned to the [HttpPost] version of the controller action. This item is then stored into session. If the system returns to the page containing the dropdown, I want the saved Value to be selected in the DropDownList. What actually happens is that the DropDownList is always set to be the first item in the list.
Database Table: This data has been imported using Link to SQL
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I had use a combox to let user select staff name and then it will automatically retrive the responsible recommending officer and approving officer to display in other 2 dropdownlist.
my code works fine but when user select staff name each time, the page will reload once to refresh the dropdownlist.
user complaint and don't want the page reload every time, how can i disable the postback? I need to use ajax?
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I have a dropdownlist attached to a cell when edit is selected. I am using the following code to populate the drop down list with the value that is on the row.
dlBU.Items.FindByValue((e.Row.FindControl("lblBU") as Label).Text).Selected = true;
This works famously when I have a value in the cell. It fails when the cell has not yet been populated. Is there an if then clause that if the value of e.Row.findcontrol("lblBU") is null no default value?
Iam using dropdownlist with required filed validator and Iam getting the text from db and binding to dropdownlist so its comng well but it is showning two times in dropdown I mean in actal place and the select place so whenever I click on button it firing...
Code:
<asp:DropDownList ID="ddlMemberType" runat="server" CssClass="product-textbox" Width="420" onchange="changeMember();">
<asp:ListItem Value="Select" Text="Select MemberType" />
<asp:ListItem Value="Family" Text="Family Man" />
<asp:ListItem Value="Employee" Text="Employee" />
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I have been having some trouble with dropdown lists reverting back to selecting the initial item in the list after a postback once a selection has been made from the dropdown list. I have read up on this and found out that a "if not ispostback then" is required.This works fine when I add in all the items in the dropdown list manually like:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
ddl1.Items.Add("Select...") [code]....
However, I have over 250 items and so it is far more efficient for me to load then in by using part of a multidimensional array which is created from a text file - Definitive database.txt. I have been using the following code to do so:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
'loads the definitive database array[code]...
This loads all the items into the dropdown list perfectly, but now every time a selection is made, it reverts back to the inital item on postback even though i have included the "if not ispostback then" part.
Here's what I want to accomplish: I have two .aspx pages, the first page with a ddl to select a vendor (SelectVendor.aspx), and one to add a vendor (NewVendor.aspx), if it's not in the first one. If a user adds a new vendor on the NewVendor.aspx page I want the page to automatically redirect back to SelectVendor.aspx and have the ddl automatically select the new vendor that was just added. Here's where I'm at so far: If a vendor is not listed in the ddl on SelectVendor.aspx, a user can click a button to navigate to a page to add a new vendor (NewVendor.aspx). On NewVendor.aspx the user types the name of the new vendor in a textbox and clicks an insert button to add the new vendor, then the page is automatically redirected back to SelectVendor.aspx with the new vendor name added to the QueryString. For example, let's say a user adds a vendor name "Best Vendor": The page is redirected back to SelectVendor.aspx as "SelectVendor.aspx ?vendor=Best Vendor"Now all I need from here is to have the ddl programmatically select the new vendor by the text value in the QueryString.
Here is the code that I'm having trouble with from my Page_Load routine for SelectVendor.aspx:
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I have drop down list in my page that contain cities name i bind it from city table
city id
Paris 1
Germany 2
Italy 3
USA 4
I have dropdown list in my page
BindDropDownList(DdlDistrict, "District1", "District", "ID");
DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));
And I use this code for binding from database
DdlDistrict.Items.FindByText(_dr["District"].ToString()).Selected = true;
Here if in database have value it show in ddldistrict
Now I want if there wasn't any thing in database in dropdown list show "select district" that i define here
DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));
I have a dropdown list created via MVCContrib FluentHTML - how do I perform a postback when the user selects any item in the dropdownlist?
View 1 Repliesi have dropdownlist with collections like countries.
ex. India
Us
Uk
in the order. I need to change the order dynamically. i,e. i want uk on top
Ex. UK
India
US
I need a control that selects Html.DropDownlist elemnti with the checkboxes you can have an example with the extension method?
View 2 RepliesI'm using a DropDownList with a data source which successfully populates the list. However, I want one of the items to be selected, namely the one where the value matches the path and query of the current request.
ddlTopics.DataSource = pdc;
ddlTopics.DataBind();
foreach (ListItem item in ddlTopics.Items)
{
item.Selected = item.Value.Equals(this.Page.Request.Url.PathAndQuery);
}
Using the debugger in Visual Studio 2008 reveals that item.Selected becomes true exactly once in the loop, but the rendered select has no option that is selected.
I'm using Visual Studio 2008 version 3.5. I have a dropDownList with over 800 names. The user wants to be able to type in it and select the name. I have seen this functionality in Telerik combobox but do not have license. How this functionality can be accoplished?
View 20 RepliesIn a gridview i have a TemplateField containing a radioButtonList. I have around 100 rows with data and each radiobuttonlist has around 5 options. I would like to have the user to select an option from the radiobuttonList and then in my button click event to record the selected value of the radiobuttonlist for each row. The area im struggling with is how could the click event of my button send the selected value for each row?
View 3 RepliesI have a ASP DropDownList that gets populated on the Page_Load event, after i select an item and hit a button the selected item gets cleared and the first item in the DropDownList gets selected. (The DropDownList is only populated when the page is not postback)
if (!IsPostBack)
{
List<Country> lCountries = new List<Country>();
List<CompanySchedule> lCompanySchedules = new List<CompanySchedule>();
this.Load_Countries(lCountries);
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I have a databound dropdown list (ASP.net). I want the page to load with a certain item as the selected item.
I am not adding a blank first row (thats not what i need)I find that I can get this to work with "AppendDataBoundItems" to true, but the side-effect is that I have all the items listed twice.
