C# - Disable Default Selection In Dropdownlist?
Mar 28, 2011
i want the code to disable default selection in dropdownlist in asp.net and also on selection of a particular data field the values are displayed in the txtbox below.the dropdown should be filled with system related data like eg c:drive, d ... etc dynamically at run time.
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Similar Messages:
Jul 21, 2010
Is there anyway to disable a textBox's validation(RequiredFieldValidator) base on the selection of dropDownList ?
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May 7, 2015
I have two tables :
1- Builder
2- Project
Structure of Builder Table :
ID INT PK Autogenerated
Name nvarchar(50)
Structure of Project Table :
ID INT PK Autogenerated
BuilderID INT
ProjectName nvarchar(50)
Now i have a dropdown combo which is manually binded to Builder Table , what i want is that it would disable all those builders in the dropdown to be selected which are residing in Project Table.
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May 7, 2015
I have 2 RequiredFieldValidator
1-Rfvare
2-RfvareC
that I put RFvare.visible=false and RfcareaC.visible=true
and 1 dropdown list below is my code:
<div id="zirbanaval"> <asp:RequiredFieldValidator ID="Rfvarea" runat="server" ErrorMessage="*لطفا مساحت زمین را وارد نمایید." ControlToValidate="txtarea" CssClass="RfvareaC" Visible="false"></asp:RequiredFieldValidator> <asp:RequiredFieldValidator ID="RfvareC" runat="server" ErrorMessage="*لطفا زیر بنا را وارد نمایید" ControlToValidate="txtMesure" CssClass="RfvareabanaC"></asp:RequiredFieldValidator> </div>
I want if users select item="Area" from dropdownlist then Rfvare.visible=true and RfvareaC.visible= false
Below is code:
protected void ddltype_OSIC(object sender, EventArgs e) {
string code = ddltype.SelectedItem.Text;
switch (code)
{
case "area":
Rfvarea.Visible = true;
RfvareC.Visible = false;
[Code] ....
but it doesn't work I mean always it shows requiredFieldValidator==>Rfvare.visible=true)
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Jul 18, 2010
For my ASP.NET page, in the code behind I load various items/options into a DropDownList but I do not set a default by assigning SelectedIndex. I notice for the postback SelectedIndex is set to 0, even if I never set focus to or changed the value in the DropDownList.
If not otherwise specified in the code behind or markup, will a default value of 0 be used for the SelectedIndex in a postback with a DropDownList? If yes, is this part of the HTML standard for selection lists, or is this just the way it is implemented for ASP.NET?
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Apr 27, 2014
i have one dropdown list and one gridview in my page by default all the textboxes in gridview enabled if i change the dropdown value textboxes in the gridview has to disable how to implement this?
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Sep 2, 2012
i have 2 DDL in my page that when users select item from ddldistric1 item in ddlcity1 will change these are my code
protected void DDLcity1_SelectedIndexChanged(object sender, EventArgs e)
{
BindDistrictC();
}
private void BindDistrictC()
[code]...
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Jan 8, 2013
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.....
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Aug 12, 2012
i have 3 drop down list in my page
1-ddlzone1
2-ddldistrict1
3-ddlstore1
this is ddlzone1 code
protected void DDLzone1_SelectedIndexChanged(object sender, EventArgs e) {
DDLstore1.Items.Clear();
DDLstore1.Items.Add(new ListItem("select center", ""));
DDLstore1.AppendDataBoundItems = true;
SqlCommand _cmd = new SqlCommand("selectcenter", _cn);
[CODE].....
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Aug 1, 2013
I have a dropdownlist on my page with dates such as 1/1/2013, 2/1/2013, etc.
Then there is a second ddl.
If the date in ddl #1 is before 1/10/2013 I want to enable ddl #2.
If the date in ddl #1 is on or after 1/10/2013 I want to either disable ddl #2 or hide it (whichever's easier).
Disabling ddl #2 based on the selected date is a new requirement so I am enhancing the existing code. Obviously I want to do this without a postback, but I don't know what is the best way. I am trying to understand what an AsyncPostBackTrigger is because this is the existing code:
Code:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:dropdownlist id="EffectiveDateDropDown" runat="server"></asp:dropdownlist>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="QuoteType"
EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
It wants to do something when the selected index is changed? This exists in the code-behind, but I set a breakpoint and never hit it:
Code:
protected void QuoteType_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
}
catch (Exception err)
{
this.PublishError(err);
}
}
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Feb 9, 2010
I have a gridview that has selection enabled but i dont want the end user to be able to select the top row is there any way to turn selection off for this row only?
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Dec 29, 2010
I have 2 dropdownlist, one is to dropdown department, and another dropdown staffnames. the secong dropdownlist will based on the selection of department as each department has different staffs i have 2 tables department and staff in my database , in my department table i have departmentid as PK and departmentname, in my staff table i have staffname and departmentid as FK. So my ques is how am i going to populate staffname in the dropdownlist according to the selection of department.
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Jan 19, 2010
I have one table which contains branch codes(primary key), Branch name and bank name columns. I have 3 dropdownlist boxes. the first dropdownlist is for the branch codes. When i select the a branch code i need the second dropdownlist box to populate with the appropriate branch name and the third dropdownlist box to populate the bank name at the same time.
Is it possible to have one table like mine and acheive this, if so how do i go about doing this?
I did read up on this but only came across ones with 3 tables.
I am using Visual Basic to do this.
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Jan 4, 2011
i have a following custom control radio button
<cc1:clgRadioButtonList ID="empType" runat="server"
RepeatDirection="Horizontal" RepeatColumns="3"
Height="10px" Width="100px">
[code]...
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Dec 9, 2010
I have a list box in my page.<td><%=Html.ListBox("listServiceTypes", Model.ServiceTypeListAll, new { style = "width: 500px;height:200px;" })%>I need to disabled selecting multiple items from the list box? I am doing something like selecting one item and click delete button my page its delting one item from list box.. but If I select multple Items its throwing an error message.?Can any body help me out how to deactive or disable multiple items from list box.
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Apr 15, 2010
I am having a problem with disabling DropDownList based on the chice of 1st DropDownList, there is no post back occuring, and it is a template based web app here is the current code:
<script type="text/javascript">
$(function() { var dropDownList1 = $('#<%= ddlUserType.ClientID %>');
var dropDownList2 = $('#<%= ddlMember.ClientID %>'); dropDownList1.change(function(e) {
if ( jQuery("#ddlUserType").val() != "ETOC") dropDownList2.removeAttr('disabled'); e.preventDefault();
else
dropDownList2.removeAttr('enabled'); e.preventDefault(); }
} );
</script>
what is happening now is page is blank and if I remove the above code everything shows, where I am going wrong. here is the plain and final javascript code which worked:
<script language="javascript">
function CheckDropDownState(lstbox)
{
if (lstbox.selectedIndex == 3) { document.forms[0].ddlMember.disabled = 1; }
else { document.forms[0].ddlMember.disabled = 0; }
}
</script>
and thew .aspx code: <asp:dropdownlist id="ddlUserType" runat="server" onclick="CheckDropDownState(this);"></asp:dropdownlist>
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Mar 25, 2011
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?
[Code]....
[Code]....
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Jan 3, 2011
I have a custom control with four checkboxlist(Country, City, Outlet, Stores) controls in it. The functionality is.. if a country is selected cities would be populated similarly outlet depends on city and stores depends on outlet. I am using the same functionality through out but in one webpage I need to disable the multi selection property of the country checkboxlist without disturbing others.Following is the javascript for the checkboxlist controls:
<script language="javascript" type="text/javascript">
function CheckBoxListSelect(cbControl, cbxControl)
{
[code]...
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Jan 18, 2011
I want to use something like the AutoCompleteExtender, however, if the user clicks on an item, I don't want that value to go into the text box. Doesn't anyone know how to do this?
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May 5, 2012
I have a checklistbox like this :
<asp:CheckBoxList ID="chklstSector1" runat="server" AutoPostBack="True" ></asp:CheckBoxList>
it allow multiple selection..i want it should select only one from list and does't allow multiple selection..
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Nov 28, 2012
I have one gridview with two template fields check box and dropdown and my doubt is dropdown validation should occur only for check box selected items..
In my form all the dropdown shows validation even though if check box is not selected
<Columns>
<asp:TemplateField>
<ItemTemplate>
[Code]....
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Jul 15, 2010
I have:<asp:TextBox ID="Profile_EMail" runat="server" CssClass="form" />
and
<asp:RegularExpressionValidator ID="Validator_Profile_EMail"
runat="server" ControlToValidate="Profile_EMail"
meta:resourcekey="Validator_Profile_EMail"
ValidationExpression="w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*">
on my ASP.NET form.
When user uses browser embedded autocomplete list and selects any element by pressing "Enter" button, validator fires. Always validation is not passed. Email pattern is proper. When user press "save" button, validation passes correctly.
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Apr 26, 2014
i have radio button list and one textbox in gridview if the value is yes text has to enable otherwise i need disable the text box in grid view how do this?
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Apr 17, 2012
I want to Enable Disable Required Field Validators based on RadioButton Selection using JavaScript
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Oct 6, 2010
For some reason, i have to make a aspx page to let iphone/android to Post form. After the data processing of request.form , i have response a JSON string in plain text. However *.aspx will enforce to render html,head,body tag,so how can i disable it?
I cannot use ashx, because the mobile have to post image via form, as i search the answer by google ,ashx cannot handle the http post files.
Edit: As SLaks said, ashx can handle POST file using "context.Request.Files" and it works.
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