How To Use Ajax In .net Page For Multiple Dropdown Control

Nov 29, 2010

I want to use ajax in my asp.net page for multiple drop down controlCorrently I am using following code

[Code]....

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I used UpdateProgress below is code

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[Code]....

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[Code]....

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AJAX :: Ajax Cascading Dropdown Control Not Working On IIS After Deploying?

Jan 12, 2011

I am new to Ajax Control Toolkit, with the help of online tutorials I had created a cascading dropdown list in asp.net and tested it on my local machine. For this dropdown list data source would be an xml file (which is saved on my local machine c drive). I haven't encountered any issues until I deploy the precompiled web site on to IIS 7. When I open the web site from IIS I would see the two dropdown boxes on the web page with an error "Method error 500". I believe this error occured due to incorrect xml file
path provided on IIS. I had copied xml and xsd files into IIS server C drive but it did not help out and then I created a network map and placed the xml and xsd files in that shared folder tried to access that path from web service, it's working on local machine but not on IIS. It would be great, if any one could explain me the solution.

Following is the .aspx and .asmx code:

.aspx code:

<form id="form1" runat="server"> <div> <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server"> </asp:ToolkitScriptManager> <br /> <table> <tr> <td> <asp:DropDownList ID="DropDownList1" runat="server"
Height="20px" Width="257px"> </asp:DropDownList> <asp:CascadingDropDown ID="CascadingDropDown1" runat="server" Category="Category" TargetControlID="DropDownList1" PromptText="[select category]" ServicePath="~/WebService.asmx" ServiceMethod="GetCategory"> </asp:CascadingDropDown>
<br /> </td> </tr> <tr> <td> <asp:DropDownList ID="DropDownList2" runat="server" Height="20px" Width="257px"> </asp:DropDownList> <asp:CascadingDropDown ID="CascadingDropDown2" runat="server" Category="Type" TargetControlID="DropDownList2" PromptText="Select
Type]" LoadingText="Loading Type.." ParentControlID="DropDownList1" ServicePath="~/WebService.asmx" ServiceMethod="GetType"> </asp:CascadingDropDown> <br /> </td> </tr> </table> </div> </form>

.asmx code(.cs code):

[WebMethod]
public AjaxControlToolkit.CascadingDropDownNameValue[] GetCategory(string knownCategoryValues, string category)
{
XmlDocument _doc = new XmlDocument();
_doc.Load(HttpContext.Current.Server.MapPath("~/C:/ItSupportCategory.xml"));
XmlNodeList list = _doc.SelectNodes("/CategoryList/Category");
List<CascadingDropDownNameValue> categorylist = new List<CascadingDropDownNameValue>();
foreach (XmlNode node in list)
{
string catid = node.Attributes["value"].Value.ToString();
string catname = node.Attributes["name"].Value.ToString();
categorylist.Add( new CascadingDropDownNameValue(catname,catid));
}
return categorylist.ToArray();
}
[WebMethod]
public AjaxControlToolkit.CascadingDropDownNameValue[] GetType(string knownCategoryValues, string category)
{
int catID;
StringDictionary selectedvalue = AjaxControlToolkit.CascadingDropDown.ParseKnownCategoryValuesString(knownCategoryValues);
catID = Convert.ToInt32(selectedvalue["category"]);
List<AjaxControlToolkit.CascadingDropDownNameValue> cascadingValues = new List<AjaxControlToolkit.CascadingDropDownNameValue>();
XmlDocument _doc = new XmlDocument();
_doc.Load(HttpContext.Current.Server.MapPath("~/C:/ItSupportCategory.xml"));
XmlElement root = (XmlElement)_doc.SelectSingleNode("/CategoryList/Category[@value='" + catID + "']");
for (int i = 0; i < root.ChildNodes.Count; i++)
{
string typeid = root.ChildNodes[i].Attributes["value"].Value.ToString();
string typename = root.ChildNodes[i].Attributes["name"].Value.ToString();
cascadingValues.Add(new CascadingDropDownNameValue(typename, typeid));
}
return cascadingValues.ToArray();
}
Xml File:
<?xml version="1.0"?>
<CategoryList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="test.xsd">
<Category value ="1" name="SYSTEM WIDE">
<Type value ="1" name="Email"/>
<Type value="2" name="SAP Locked"/>
<Type value="3" name="Job Archive Full" />
</Category>
<Category value="2" name="SAP">
<Type value="3" name="Pricing Incorrect"/>
<Type value="5" name="New Item #"/>
<Type value="6" name="Reports"/>
<Type value="7" name="New User Setup"/>
</Category>
<Category value="3" name="OTHER">
<Type value="8" name="Production"/>
<Type value="9" name="Office"/>
<Type value="10" name="Toner for Printer"/>
<Type value="11" name="Security Camre Lookup"/>
</Category>
</CategoryList>

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Feb 16, 2010

I have a user control, that has an update panel and update progress control in it.

I use this user control in more than 1 location on the same page.... problem is, when ucA posts back, I see the update progress control for both ucA and ucB. I assume this is because it is a user control and the update panel and progress are named the same?

Either way - how do I make it so that the update progress only displays for the proper user control?

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AJAX :: Other Dropdown Hiding AutoCompleteExtender Control List?

Jun 29, 2010

on page AutoCompleteExtender is implemented and just below it, one dropdown is there.

When AutoCompleteExtender displays the list it is getting hide by the below dropdown.

All the controls on page are dynamic.

So, i cannot hide the other dropdowns to get it work.

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how to work with multiple series! for example: with 2 series and display the name of each series in the graph! like this example: URL...

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Aug 12, 2010

I tried to use a DropDown-Control (WebDropdown from Infragistics) for the following function: Let the user enter any text or if he wishes choosing by a context menu two different "Already exist entries" in the DropDown-List from where he can choose a value. The behaviour should be this for the DropDown: Right-clicking on the DropDown-Control, filling the DropDownList in the server depending on the choosen context menu item, opening the DropDownList in the client.

The way I tried to solve:

Open (by javascript) a context menu by right clicking on the control

[Code]....

What's the problem? The problem is, that the above javascript function does find the WebDropDown1 control only if it is called client side (e.g. with a OnClientClick button event), calling it from server side (as in the ContextMenu_ItemClick subroutine) it does not find the WebDropDown1 control. The error is shown (translated into english): run time error: object expected.

Maybe a completly different solution is necessary as I transfer a windows forms program into a web form ajax style program. I could use a textbox with dropdownextender for example. But the problem seems to be always the same: uncoupling the dropdown function, which is a client side one, by first filling the dropdownlist on server side, and then invoking the dropdown event makes the problem.

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[Method Error 500] In Cascading Dropdown Update In Ajax Control Toolkit

Apr 16, 2010

I am getting [MethodError 500] when I use cascading drop down. below is my code

<tr>
<td >
Select a Hoster:
</td>
<td>
<asp:DropDownList ID="ddlFeaturedHoster" runat="server" ></asp:DropDownList>
</td>
</tr>
<ajaxToolkit:CascadingDropDown ID="cddHoster" runat="server" TargetControlID="ddlFeaturedHoster"
PromptText="Select a Hoster" LoadingText="Loading ..." Category="ActiveHoster"
ServiceMethod="GetDropDownContents" ServicePath="~/Hosting/HostingService.asmx"/>
Service Code:
[WebMethod]
[ScriptMethod]
public CascadingDropDownNameValue[] GetActiveHosters()
{
List<CascadingDropDownNameValue> returnList = new List<CascadingDropDownNameValue>();
HostersManager hosterManager = new HostersManager();
List<Hosters_HostingProviderDetail> hosters = hosterManager.GetAllHosters();
returnList.Add(new CascadingDropDownNameValue("--Please Select One--","0",true));
foreach (Hosters_HostingProviderDetail item in hosters)
{
returnList.Add(new CascadingDropDownNameValue() { name=item.HostingProviderName, value= item.HosterID.ToString()});
}
return returnList.ToArray() ;
}
[WebMethod]
[ScriptMethod]
public CascadingDropDownNameValue[] GetDropDownContents(string knownCategoryValues, string category)
{
knownCategoryValues = FormatCategoryWord(knownCategoryValues);
List<CascadingDropDownNameValue> values = new List<CascadingDropDownNameValue>();
HostersManager hosterManager = new HostersManager();
switch (category)
{
case "ActiveHoster":
values.AddRange(GetActiveHosters());
break;
case "ActiveOffer":
values.AddRange(GetActiveOffers(1));
break;
}
return values.ToArray<CascadingDropDownNameValue>();
}
/// <summary>
/// Formats the category word
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
private string FormatCategoryWord(string value)
{
if (string.IsNullOrEmpty(value)) return value;
if (value.LastIndexOf(":") > 0) value = value.Substring(value.LastIndexOf(":") + 1);
if (value.LastIndexOf(";") > 0) value = value.Substring(0, value.LastIndexOf(";"));
return value;
}
}

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Is the same possible with code behind as C# language ?

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I have a function on page load which will work based on dropdown selected value. and I am using this dropdown in a user control. So getting problem because the dropdown value is not loaded yet before Page Load. How Can I do that using those control still.

Here is my code below.

public partial class GradeEntry : System.Web.UI.Page
{
StudentManager studentManager = null;
CourseManager courseManagerObj = null;
GradeManager gradeManager = null;

[Code]....

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I have a drop down list embedded in a menu panel in my master page. This ddl fetches it's list items from my SQL Server. They are:

1. Select a type --appended during page load

2. Green type -- fetched from SQL server via a datasource

3. Red type -- fetched from SQL server via a datasource

4. User Manual -- appended during page load

For the sake of simplicity my website has 4 pages. When the 'Select a type' list item is selected - the user should be taken to a general 'Introduction' page. When the 'Green type' - the user should be taken to a 'Green' page - and etc.

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I Have the gridview control with 2 dropdown list and 2 text boxes,When the textbox chnaged event happen 1 row will create and the dropdown back to initial values( its not retaining the selected values),I am binding the control after text changed method,Is there any properties needs to be set or any other way we can retain the values in postbacks?

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I am using cascading dropdown, model popup and update panel in my page.

my all drop down are in update panel. now i am retrieving values from the database through data reader and assign value of respective data to the respective control. but control (drop down list) shows "--select--" and not the retrieve value i.e. "Hospital"

Following is the code:

<table>

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My scenario is i have 4 tabs, under every tab there are five cascadded combo. So for page load itself it calling webservice at last and populate all parent cascaded dropdowns in all the four tabs.

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AJAX :: How To Select The Dropdown Values(this Works) And Then Click The Button To Redirect To Another Page

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I have a master page with an accordion in it inside the accordion panel1 are 3 dropdownlists (ajax cascading) and a button when the default page is loaded i want to select the dropdown values(this works) and then click the button to redirect to another page called test.sapx (this works). The thing i also want to do is pass the dropdownlist values to the new page as the dropdownlists reset. I was trying to do this through the click event on the button and set them in a session variable. The click event isn't firing at all. The page redirects and then if i click the button again it fires the event?

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