Setting The "Selected" Property Of .NET ListItem (HTML Generic Control)?
Mar 8, 2011
For reasons outside my control I have a table containing input and select fields built using regular HTML with the runat="server" attribute (as opposed to standard ASP.NET controls). I am trying to set a value to be selected when the page is loaded based on values being passed from the Session (again, factor outside my control).
Setting the Selected property of the list item does nothing and doesn't select the item in question. How do I achieve this?
the Select portion doesn't work, although it gets executed on the proper item. Should this code be called in a specific event? I believe it's being called in Page_Load; should it be called in Pre_Render instead?
Parser Error Message: The 'Text' property of 'asp:ListItem' does not allow child objects.
Source Error:
Line 468: </asp:ListItem> Line 469: <asp:ListItem Value="3"> Line 470: Search only continuing stories with at least <input runat="server" id="episodetb" Value="0" style="width:50px" /> Line 471: episodes Line 472: </asp:ListItem>
When my original code is like this:
< asp:RadioButtonList ID="ContStoryRadioButtonList" DataTextFormatString=" {0}" CellPadding="2" runat="server"> <asp:ListItem Value="0"> Search singular and continuing stories </asp:ListItem> <asp:ListItem Value="1"> Search only singular stories </asp:ListItem> <asp:ListItem Value="2"> Search only continuing stories </asp:ListItem> <asp:ListItem Value="3"> Search only continuing stories with at least <input runat="server" id="episodetb" Value="0" style="width:50px" /> episodes </asp:ListItem> </asp:RadioButtonList >
I've been all over the Internet looking for an acceptable solution to this issue, but didn't find one, so hopefully I'll have more luck here. I've got a Html.DropDownList control in my application that pulls in a set of values from the database. That works just fine. However, I want to set the selected value in code, which has never worked correctly. This is, in my opinion, one of the worst implementations of Html helpers in MVC. Here's the culprit:
[Code]....
OK, it takes in a list of statuses and gets the text/value options set without a problem, but doesn't ever render the selected value on the option with a value (ID) of "5". I've stepped through the code as it is assigning these values, and it does set the value of that option to select = true, but the rendered html doesn't reflect this. I recall something about this helper using the Model to set its selected value, but why will it not allow the value to be explicitly set? Even better, if for some reason explicitly setting this in code isn't going to work, why allow it as viable code, and just silently fail? I'm all for this coding by convention approach MVC has taken, but when the convention is explicitly overridden in code, the code should prevail, I would think.
I have created a user custom control, and what I would like to do is to pass it the text value from a label where I can carry out some other processing.
I need to validate a textbox to ensure the submit date is older than Today. I wanted to use a CompareValidator to do that, but unfortunately the following code doesn't work:
I have an ASP.NET web application and at a certain point I do this:mycontrol.stringparameterforjscript = "document.getElementById('" + myotherparam + "').value = 'Hello'";The problem is that this thing does not work.s you can see this sets a javascript in some event of some tag. Well when the page is redered the problem is that my parameter look like this:
Setting value in html control in code behind without making server control
<input type="text" name="txt" /> <%--Pleas note I don't want put runat=server here to get the control in code behind--%> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
Code behind
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { //If I want to initlize some value in input, how can I set here } } protected void Button1_Click(object sender, EventArgs e) { Request["txt"] // Here I am getting the value of input }
I am using jquery and c# to dynamically set a radiobuttonlist listitem to selected. I want to create a reset-type button to reset the radiobuttonlist selected item back to the first item in the list. jQuery/jsTree function currently reseting textbox and hidden field:
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I have 2 radiobuttonlist in a web forms, each contains of 4 ListItem. So there are 8 ListItems in total. It is initialised such that none of the ListItems is selected. I want to validate that at least one of the ListItems is selected when submit button is pressed. How to do it? i.e. at least 1 ListItem is selected, either from radiobuttonlist1 or radiobuttonlist2.
I have 2 radiobuttonlist in a web forms, each contains of 4 ListItem. So there are 8 ListItems in total. It is initialised such that none of the ListItems is selected. I want to validate that at least one of the ListItems is selected when submit button is pressed. How to do it? i.e. at least 1 ListItem is selected, either from radiobuttonlist1 or radiobuttonlist2.
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For i As Integer = (DateTime.Now.Year - 3) To (DateTime.Now.Year + 1) DropDownList1.Items.Add(i.ToString()) Next DropDownList1.SelectedItem.Text = DateTime.Now.Year
As result, I'm having the items in this order: 2011 (selected), 2009, 2010, 2011, 2012. The 2011 is duplicated (I wonder why). When I view the source page on Internet Explorer, I have this:
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[Code]....
I have 3 items in the list collection, in which Student Name is same for 2 items.
Now I am getting 3 tables. I want to group the student Name and get a single table for unique student name.
This is my list collection:
Student ID Student Name Mark1
1 John 25 2 Mac 22 3 John 24
I am getting 3 tables now, but i would like to group the student Name and then get a single table for John having his marks and another table for Mac.
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Line 44, Column 69: there is no attribute "AlternateText" You have used the attribute named above in your document, but the document type you are using does not support that attribute for this element. This error is often caused by incorrect use of the "Strict" document type with a document that uses frames (e.g. you must use the "Transitional" document type to get the "target" attribute), or by using vendor proprietary extensions such as "marginheight" (this is usually fixed by using CSS to achieve the desired effect instead).
This error may also result if the element itself is not supported in the document type you are using, as an undefined element will have no supported attributes; in this case, see the element-undefined error message for further information.
How to fix: check the spelling and case of the element and attribute, (Remember XHTML is all lower-case) and/or check that they are both allowed in the chosen document type, and/or use CSS instead of this attribute. If you received this error when using the <embed> element to incorporate flash media in a Web page, see the FAQ item on valid flash. I can't figure this out.
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Is there a setting that I can change in the VWD properties that will enable changes through the property window for a control to automatically update the HTML tag for that control?
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