Clear A DropDownList From Code Behind?
Sep 1, 2010I want to clear the value of DropDownList from codebehind and i have found following
solution.
[Code]....
I want to clear the value of DropDownList from codebehind and i have found following
solution.
[Code]....
I am having two dropdownlist in my project,one dropdownlist for empid, another dropdownlist for month, if the user select the empid, the values are retrieved in the textbox.
In the second dropdownlist, if the user select the month in the dropdownlist it will display the leave details, its all working fine, if the user again select the first dropdownlist that means empid, I want to show the second dropdownlist as select month, how can do this.....
i have two radio button list on my page on my Frist Index there is a panel with Drop Down List and on Second Index there is a static variable in which i am storing value as Pending
now as soon as i select my Second RadioButtonList it also stores the DropDown List Value
how i can clear the DropDown List Value?
My Code
[Code]....
My Page Source
[Code]....
I have dropdownlist in my page
In Page_load page I wrote below code
if (!IsPostBack) {
DDL1.Items.Insert(0, new ListItem("select city", "0"));
DDL2.Items.Insert(0, new ListItem("select region", "0"));
DdlDistrict.Items.Insert(0, new ListItem("select district", "0"));
}
And in this page I have btnInsert that when users click on it, it insert data in database
I want when users click on button all textboxs text be clear and all DDL selected Item clear so I set below code in btnInsert event
protected void imginsert_Click(object sender, ImageClickEventArgs e) {
SqlCommand _cmd = new SqlCommand("insertFreg", _cn);
_cmd.CommandType = CommandType.StoredProcedure;
_cn.Open();
_cmd.Parameters.AddWithValue("@address", txtsdd.Text);
_cmd.Parameters.AddWithValue("@Aname", txtAname.Text);
[Code] .....
But here when I click on button it clear textboxs text but it didn't do any thing on Dropdownlist i.e
If I select 'Paris' from DDL1 when I click on button I want It show in ddl1 'Select city'
But it show 'Paris' again
What should I do?
When the WebPage loads i would like for the Text to be cleared in Ajax ComboBox and/or DropDownList. However Setting the text to nothing or null doesn't seem to work. So I did some searching and found this...
[Code]....
Is there another way to clear the text other then adding a null item to the list? I don't really want the user to have a selection of "null", this seems like a hack job.
I have the problem with dropdownlist value inside gridview.my problem is i have textbox,button with two dropdownlists, dropdownlists are inside gridview.Two dropdownlists are one is ddlcountry and another one is ddlstates. if i select country from ddlcountry , country related states comes in ddlstates. after entering first record value in textbox then button click textbox value is shown in gridview with two dropdown lists dropdown list, after selecting one dropdownlist country and states, i enter second record value and button click then only country selected value visible ddlstates selectedvalue not visible in first record in gridview...
View 1 Repliesi am using html input fields for inserting data to db e.g.:
<input type="text" runat="server" ClientIDMode="Static" id="StreetNo" class="form-control input-mask-phone"/>
and a submit button for submitting all data :
<button class="btn btn-info btn-block" style="height: 40px;" OnServerClick="SubmitProject_OnServerClick" ValidationGroup="Date" type="button" runat="server" ClientIDMode="Static" id="SubmitProject"> Submit </button>
also i am using an update panel to trigger this button click event ( to avoid postbacks and page refreshing ) . i want to clear out all my fields after submition of data , but it won't happens , even i tried on submit_click's event also , i did :
/// after submittion
StreetNo.Value = string.Empty;
but nothing happend ..
I have one dropdownlist and textbox which is databinded and will display retrieved data on a listbox, i wanted to clear the textbox and dropdownlist using a button after displaying data on the listbox.
View 2 RepliesCan anyone clear my ASP Checkbox in this code? I have tried .ClearSelection() but this is incorrect
[Code]...
HTML has an input button type to reset all fields in a form to their initial state in one step: <input type="reset" ... />.
Is there a similar simple way to reset all form fields of an aspx page from code-behind? Or is it necessary to reset all controls one by one with TextBox1.Text=string.Empty, TextBox2.Text=string.Empty, etc. ?
Update:
Context is a simple Contact/"Send us a message" page with 8 asp:TextBoxes on the page (where the user enters the name, address, phone, email, message, etc.). Then he clicks on submit, the Onclick message handler in code-behind sends an email to some administrator, and all the form fields the user filled in should be emptied and he gets a notification in a label ("Message sent blabla..."). I want to have the form fields cleared to avoid that the user clicks again on submit and the same message is sent a second time.
I have a asp.net web application and I'm using cache (HttpRuntime.Cache) to save some stuff from db.
I also update db from time to time so that data in db does not match the data in my application's cache.
Is there any way how to clear my application's cache without modifying any source code or republishing the page?
I tried to restart IIS and to clear browsers cache
i want to clear datakeys of gridview from code behind
here is gridview
<asp:GridView ID="gv" runat="server" DataKeyNames="row_ID" AllowSorting="True" AutoGenerateColumns="false">
</asp:GridView>
and i added columns dynamically from code behind
[Code]....
I have create user wizard control and i put validation control for all field but when i close user control that validators dint clear in firefox or but clear in IE
View 3 RepliesCurrently,below is my code.
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection conn = new SqlConnection("Data Source= E\SQLEXPRESS;" + "Initial Catalog=k;Integrated Security=SSPI");
SqlDataAdapter adapSel;
string mySQL = "select column_name from information_schema.columns where table_name='examtimetable' '" + dd_list + "'";....
I receive an error "Incorrect syntax near 'System.Web.UI.WebControls.DropDownList'."
What is difference between Session.Clear() vs. Session.Contents.Clear()?
I want to clear all the Session variables.
On an aspx page I have a dropdownlist and a button.
I select a value from the dropdownlist and click the button.
In the button event handler I have the statment: DropDownList1.SelectedValue;
This value is showing up as the first item in the list regardless of what item is actually selected.
Same result with .SelectedItem.Value and .Text
Why? And how do I get the item actually selected?
I have a UserControl, containing a FormView, containing a DropDownList. The FormView is bound to a data control. Like so:
<asp:FormView ID="frmEdit" DataKeyNames="MetricCode" runat="server"
DefaultMode="Edit" DataSourceID="llbDataSource" Cellpadding="0" >
<EditItemTemplate>
<asp:DropDownList ID="ParentMetricCode" runat="server" SelectedValue='<%# Bind("ParentMetricCode") %>' />
I am trying to populate the DropDownList from the codebehind. If this was not contained in a FormView, I would normally just do it in the Page_Load event. However, that does not work within a FormView, as as soon as I try to do it, accessing the dropdownlist in code, ie: theListcontrol = CType(formView.FindControl(listControlName), System.Web.UI.WebControls.ListControl)
the data binding mechansim of the FormView is invoked, which, of course, tries to bind the DropDownList to the underlying datasource, causing a *'ParentMetricCode' has a SelectedValue which is invalid because it does not exist in the list of items. Parameter name: value * error, since the DropDownList has not yet been populated. I tried performing the load in the DataBinding() event of the FormView, but then:
theListcontrol = CType(formView.FindControl(listControlName), System.Web.UI.WebControls.ListControl) fails, as the FormView.Controls.Count = 0 at that point. Is this impossible? (I do not want to have to use a secondary ObjectDataSource to bind the dropdownlist to)
In MS Access there is a great method call 'dropdown', you set the focus to the control, mycontrol.setfocus and then call mycontrol.dropdown, really useful when using cascading dropdowns.
Is there a similar method in asp.net or how would I get the dropdownlist to dropdown through code?
I have a dropdown within gridview i have binded that dropdown with datasource values.
i will select any value from dropdown then it will save in database.
now i want to show the database value in the top value in same dropdown with sqldatasource.
Suppose i have value in dropdown from sqldatasource is test,test1,test2.
Suppose i have selected test1 then it will save in database now i want that dropdown show this values test1,test,test1,test2
I have code that populates 2 dropdownlist in a gridview. DropStart And DropEnd I want to add time values depending on a few things here's the routine I cal.
Code:
Public Sub GenerateTime(RowIndex As Integer)
Dim ComboStart As New DropDownList
Dim ComboEnd As New DropDownList
Dim ItemList As ListItem
Dim TimeInterval As Integer
Dim IntervalleCalcul As Integer
Dim NombreIntervalles As Integer
[code]....
now this code is called, and runs fine, it goes in the for loop and I see if I trace it that combostart and comboend both have 96 Items in them as expected. hence it did find the controls in the gridview. but when I exit this sub and continue the code by just running the code in the asp.net page the two corresponding dropdown control don't get the values that did get added in the code behind.
In the RowEditing is when I call this routine.
Code:
Private Sub GridDetails_RowEditing(sender As Object, e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles GridDetails.RowEditing
GridDetails.EditIndex = e.NewEditIndex
GridDetails.DataBind()
GenerateTime(GridDetails.EditIndex)
End Sub
How I populate a dropdownlist from code behind. I want to add the items from an access database. I know how to read the rows but don't know how I add them to the dropdownlist. What I mean by this is I need to add a value column and a display column because I want to save the code value not the display value.
Is this possible and if so how do you do it?
I'm working on web pages that have an ASP DropDownList defined, and on page load the data source is bound to it through DataSource.DataBind(). When I step through the code, the drop down list does not show anything in it, but when the page actually displays, it does have items in the list. When exactly does DataBind() get applied to the control?
The problem is that some of the values returned by the SQL back end have a null Text, so nothing is displayed in the drop down list for that row. I want to just use the Value as the Text, but only if the Text is null. And when I put the code to loop through and do that right after the DataBind(), there is nothing in the drop down list at that point in the code.
I have two DropDownLists; DropDownListStart displays the hours 09:00 - 19:00 and DropDownListStop displays 10:00 - 20:00. When the user chooses one of the hours in DropDownListStart I want the program to adjust what's shown in DropDownListStop so that the first hour shown is one hour after the hour chosen in DropDownListStart. How can I do that in code behind (c#)? An example: if the user choses 13:00 in DropDownListStart I want DropDownListStop to display only 14:00, 15:00, 16:00, 17:00, 18:00, 19:00, 20:00.
View 12 RepliesI have a DDL that has 5 options in it. Based on the options a different query is run and bound to
a detailsview. At this point the DDl does not fire the query.
Here's the DDl from the page and the code behind
[Code]....
Here's what I have. I was able to debug and traverse through the webservice and return teh array back into the first call method of: return new CarsService().. But back in the page_load method, I can't get it to update and show up in the page.
<asp:UpdatePanel ID="UpdatePanel2" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<cc1:CascadingDropDown ID="CascadingDropDown1" runat="server" TargetControlID="DropDownList1"[code]....