I am new to using Ajax Control toolkit. I need to create a dynamic cascading dropdowns in which the no of dropdowns will be programatically decided. Also the last dropdown can be replaced with a listbox as well. how i can leverage the Ajax toolkit's cascading dropdown.
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How can i generate dropdown lists based on what has been selected in the checckbox list. Below is an example of what i need. if the user selects the options day, lotID and waferID, then 3 cascading dropdown lists should be displayed. And then a gridview displays data based on what has been chosen in the dropdown lists.
Day
LotID
SlotID
WaferID
VendorID
ToolID
LocationDetected
ProcessStep
Stage
Precipe
WaferStartMaterial
WaferStartVendor
WaferStartLot
WaferDiameterCOA
WaferMapTitle
BreakPoint
BreakpointSide
BreakpointMeasurement
I have a Cascading drop down list that is working fine to load the correct lists however I would like to have the last one initiate a query and display a datagrid on the same page containing the results of the query. Without Ajax involved this seems rather easy by using autopostback on the drop downs. If I could do it through Ajax that would be great but I can settle with having the page to reload to display the data. Right now I'm not sure how to do either. I enabled autopostback on the last drop down and wrote a method for it but I get an error at runtime saying:
Invalid postback or callback argument
I've 2 dropdownlists, both are binded to a cascadingdropdown. Whenever I select an option in the 1st dropdownlist (parent), the options in the 2nd dropdownlist (child) will repopulate based on the options I selected in the parent dropdownlist. I need a javascript function to reset the options of both dropdownlists in their initial state (the prompt text).
I've tried changing the selectedIndex of the parent dropdownlist. However, this only changes the selected option in the parent dropdownlist. It does not reset the child dropdownlist to its initial state (which is supposed to be disabled and without any options). Need the script to reset the chained dropdownlists?
is there a way to cancel the current selection for a cascadingdropdown list ? For example, user changes selection, I present user with option to cancel selection and if he chooses to cancel, then the old value should be reverted.
View 9 RepliesHave spent hours trying to create a Dynamic Data Field Template holding a DropDownList which is extended by the AJAX Cascading DropDown extension.Final form holds multiple cascading dropdown boxes. User selects Country (Land) then Postcodes, Counties (Provincie) are populated. Once postcode is selected then towns (Plaats) are populated. The problem I am now facing is that the viewstate for the dropdown lists is not being saved/restored after an insert action or custom validation error. So basically the dropdown lists are being reset to their default values.Some code (if missing parts, just ask and I will post them) - Don't mind the code structures etc... needs some refactoring :)Attribute I created:
[Code]....
KlantMetaData (=> Klant is Dutch for Customer ):
[Code]....
DynamicDropDownList Control I created:
[Code]....
Dynamic FieldTemplate created for inserts:
[Code]....
EntityTemplate I created:
[Code]....
Webservice methods created:
[Code]....
Code in masterpage:
[Code]....
I am using the newest AJAX control toolkit. What I want to accomplish is I have a modal popup panel with cascading dropdown list and radio button inside. The issue is the postback. RadioButton and Cascading dropdown have postback so that will cause the modal panel disappear after the postback. I just want the panel disappear after I click the ok button on the panel and send the data into a field in a page. What I did was I placed the update panel inside the popup panel. If I did that, I would see the dropdown lists automatically refresh every time by accessing the webservice. If I placed the update panel outside, the dropdown would not be triggered. Even I set the trigger for the Update Panel, it will not see that way.
View 2 RepliesI am using cascading dropdown list where the no of dropdowns is created dynamically on the page. The cascading drop downs are contained in a User Control. I need to call a method from the Parent page which will be executed when the values in one of the dropdowns change. The server side event is not firing as I have set AutoPostback property for the dropdownlists to be false. How can i make the Page event fired from the Selected index changed of the dropdowns keeping the autopostback property to be set as false.
View 5 Repliesi use cascading dropdown lists (in a user registration form) and when the user hits the submit button i get the error: "Invalid postback or callback argument" I've seen on the net that this is a problem dating back many years but still haven't found a solution to this. I've read about changing EnableEventValidation to false, but this poses a security risk.
View 2 RepliesI have a form that needs to display 3 dropdown lists, one for my client type, then, based on the selection, my second list shows the clients for that type, and then based on the client name, my third dropdown box shows the contacts for that client. The first dropdown list one being a normal html.dropdownlist, and the other 2 being CascadingDropdownLists.
I have followed Stephen Walther's method 1 located at [URL]. If I select my client type, then my client names in my second dropdown shows perfectly, but when I choose my client name, the third dropdown does not work. When I view my page source, all my contacts are listed in my <select> control, but my dropdown box stays blank. Did anyone ever get a third dropdown to work?
I'm trying to follow this article on cascading dropdown list in a GridView control in edit mode (except I'm using C#) [URL] I keep getting this error message "ProjectID is neither a DataColumn nor a DataRelation for table DefaultView."
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if ((e.Row.RowState & DataControlRowState.Edit) == DataControlRowState.Edit)
{
DataRowView dv = (DataRowView)e.Row.DataItem;
//// Preselect correct value in Projects list
DropDownList listProjects = (DropDownList)e.Row.FindControl("DropDownList1");
listProjects.SelectedValue = dv["ProjectID"].ToString(); // *****************this is where I get the error *********
// Databind list of categories in dependent drop-down list
DropDownList listCategories = (DropDownList)e.Row.FindControl("DropDownList2");
SqlDataSource dsc = (SqlDataSource)e.Row.FindControl("sdsDDL2");
dsc.SelectParameters["ProjectName"].DefaultValue = dv["ProjectName"].ToString();
listCategories.DataBind();
listCategories.SelectedValue =(dv["CategoryID"].ToString());
}
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:ttuser %>" SelectCommand="SELECT
TE.TimeEntryID,
P.ProjectName,
CAT.CategoryName,
TE.TimeEntryDescription,
TE.TimeEntryDuration,
TE.TimeEntryDate
FROM dbo.aspnet_starterkits_TimeEntry TE inner join
dbo.aspnet_starterkits_ProjectCategories CAT on
TE.CategoryID=CAT.CategoryID inner join
dbo.aspnet_starterkits_Projects P on
CAT.ProjectID=P.ProjectID
Where TimeEntryUserID=(SELECT UserId FROM dbo.aspnet_Users WHERE
UserName=@UserName) AND
TE.TimeEntryDate=@WeekEnding
" OldValuesParameterFormatString="original_{0}" UpdateCommand="UPDATE dbo.aspnet_starterkits_TimeEntry
SET
TimeEntryDescription=@TimeEntryDescription,
TimeEntryDuration=@TimeEntryDuration,
TimeEntryDate=@TimeEntryDate
WHERE
TimeEntryID=@original_TimeEntryID">
<SelectParameters>
<asp:ControlParameter ControlID="UserList" Name="UserName"
PropertyName="SelectedValue" />
<asp:ControlParameter ControlID="WeekEnding2" Name="WeekEnding"
PropertyName="Text" />
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="TimeEntryDescription" />
<asp:Parameter Name="TimeEntryDuration" />
<asp:Parameter Name="TimeEntryDate" />
<asp:Parameter Name="original_TimeEntryID" />
</UpdateParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource1" BorderWidth="0px"
BorderStyle="None" Width="100%" CellPadding="2" PageSize="25"
DataKeyNames="TimeEntryID" onrowdatabound="GridView1_RowDataBound"
onrowupdating="GridView1_RowUpdating" >
<Columns>
<%--<asp:CommandField ShowEditButton="True" />--%>
<asp:BoundField DataField="TimeEntryID" HeaderText="ID"
SortExpression="TimeEntryID" InsertVisible="False" ReadOnly="True"
ItemStyle-HorizontalAlign="Center" >
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:BoundField>
<asp:TemplateField HeaderText="Project" SortExpression="ProjectName">
<EditItemTemplate>
<asp:DropDownList
ID="DropDownList1"
runat="server"
DataSourceID="sdsDdlProjectsEdit"
DataTextField="ProjectName"
DataValueField="ProjectID"
AutoPostBack="True"
onselectedindexchanged="DropDownList1_SelectedIndexChanged">
</asp:DropDownList>
<asp:SqlDataSource
ID="sdsDdlProjectsEdit"
runat="server"
ConnectionString="<%$ ConnectionStrings:ttuser %>"
SelectCommand="SELECT ProjectID,ProjectName FROM dbo.aspnet_starterkits_Projects">
</asp:SqlDataSource>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("ProjectName") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Category" SortExpression="CategoryName">
<EditItemTemplate>
<asp:DropDownList
ID="DropDownList2"
runat="server"
DataSourceID="sdsDDL2"
DataTextField="CategoryName"
DataValueField="CategoryID">
</asp:DropDownList>
<asp:SqlDataSource
ID="sdsDDL2"
runat="server"
ConnectionString="<%$ ConnectionStrings:ttuser %>"
SelectCommand="SELECT CategoryID,CategoryName FROM dbo.aspnet_starterkits_ProjectCategories WHERE ProjectID=@ProjectID">
<SelectParameters>
<asp:Parameter Name="ProjectID" />
</SelectParameters>
</asp:SqlDataSource>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("CategoryName") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:BoundField DataField="TimeEntryDescription" HeaderText="Description"
SortExpression="TimeEntryDescription" ItemStyle-HorizontalAlign="Center" >
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:BoundField>
<asp:BoundField DataField="TimeEntryDuration" HeaderText="Hours"
SortExpression="TimeEntryDuration" ItemStyle-HorizontalAlign="Center" >
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:BoundField>
<asp:BoundField ApplyFormatInEditMode="True" DataField="TimeEntryDate"
DataFormatString="{0:d}" HeaderText="Week Ending"
SortExpression="TimeEntryDate" ItemStyle-HorizontalAlign="Center" >
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:BoundField>
<asp:CommandField ShowEditButton="True" HeaderText="Edit" ButtonType="Image" EditImageUrl="images/icon-edit.gif"
UpdateImageUrl="images/icon-save.gif" CancelImageUrl="images/icon-cancel.gif" />
</Columns>
</asp:GridView>
I tried cascading dropdown in asp.net using ajax. I have tried with 3 dropdown control. The scenario is First dropdown is loaded when page gets loaded and the second dropdown is loaded based on first is selected and thrid dropdown is loaded based on second one selected, now I want to know how do I load third dropdown based on first and second selected value...
View 1 Replies i havce this web service
[Code]....
and this aspx page
[Code]....
perhaps i followed this example here
http://programming.top54u.com/post/AJAX-Cascading-Dropdown-Example-using-SQL-Database.aspx
it return an error that
System.InvalidCastException: unable to cast di object of 'AjaxControlToolkit.CascadingDropDown' on tye 'System.Web.UI.WebControls.DropDownList'.
Suppose parent dropdown is car (Values are car1, car2, car3)and its child is color(for car1 R Y G B, For car2 R Yand for car3 G B).Now on selection of car2 R and Y will appear and select R, then again made the change on car and select car3 then again select is comiing with G and B and select B.
Now if I select again in car, car1 then the child is populating with the values of car1 but it takes the B as a default value as it was previously selected and also present for car1 too.This case is only happen. on select of child value which is availble for both parent selection.
i am going to use cascading dropdown in my project But i cant understand why it is not working let me know what i am doing wrong...
this is my aspx page,
[code]....
I have a cascading dropdown which is dynamically created and does a postback based on a certain condition. How do i set the selected value after the postback
View 1 Replies[Code]....
Dont go away by looking a difficult probem.
I want to make a cascading dropdown list without using an UpdatePanel. I need tips for starting out this task. Currently,
I am using asp.net 2.0 .Will I be able to parse JSON in VSS 2005 if I use JQuery ?
What is the recommended alternate for UpdatePanel in Visual Studio 2005 ?
I am using Cascading Dropdown nad would be populating the values of the second dropdown from the session thats created when the page load.With the initial page load, the cascading dropdown works fine. But when I change the selection for the first one, the session values are not retained.
View 1 RepliesI have been trying to make a cascading drpdown using ajax using this link [URL] But m nt getting a clear picture abt it.. I have a table 'car' with fields of 'id','make','model','color'. I have 2 dropdowns on my form for make & model.I want to populate the model dropdown using the make dropdown but without postback.Till nw I have tried this :-
using System;
using System.Web;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Web.Services;
using System.Web.Services.Protocols;
using AjaxControlToolkit;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
//using System.Web.Script.Services.ScriptService;.............................
I want to display the image before the data in the dropdown based on the data category? is it possible with cascading dropdown?
View 2 RepliesI have a user control in which i have implemented Cascading dropdown. It works perfectly fine in IE but doesnt in Firefox. I am using webservice to get my data for the dropdowns.
View 3 Replies<asp:DropDownList ID="ddlModuleName" runat="server" ClientIDMode="Static">
</asp:DropDownList>
<cc1:CascadingDropDown ID="cdlModule" TargetControlID="ddlModuleName" PromptText="Select Module" PromptValue="0" ServicePath="~/controls/WebService.asmx" ServiceMethod="GetModules" runat="server" Category="ModuleID" LoadingText="Loading..." />
I am binding the dropdownlist by using ajax cascading drop down now i need to preselect the dropdown value in code behind page in page load (for update operation) is it possible
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>
I have 3 dropdown lists. All 3 are using the same generic list for there items. I am using C# as the code behind. The code below shows the DTO list i am using and how I'm adding them to the drop downs...
[Code]....
