C# - Binding An Xml Node's Children To DropDownList
Nov 30, 2010
I'm trying to bind the contents of a node of XML to a Drop Down List without much success. Initially, the whole XML document is bound to a repeater - this works perfectly, but now I need to display a drop down list based on the children in the "" node, but I get Data at the root level is invalid. Line 1, position 1 error message on the DataBind() method on the dropDownList. The code snippet I'm using is:
I created a sitemap with a treeview navigation in my aspx site. I am hoping someone can show me the code to put in a Masterpage so that when I expand a child node, all other nodes collapse, and when I expand another node, the previous expanded node collapses.
I have an example here of what I am trying to accomplish:
[URL]
I am using asp.net with VB.
I have been scouring the internet looking for a solution, but so far haven't found anything that works.
I'm populating a treeview dynamically. On OnTreeNodePopulate I call a sub and populate the Parent nodes. I do not want to populate the child nodes at this time. Upto this point it works fine.
Now I would like the user to click the parent node and then populate the child node. I tried to use TreeNodeExpanded, but that is called for each parent node, so that didn't work.
I want to bind a dropdownlist to a database. I did the following coding but it isn't working.
using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.Odbc; using System.Data.SqlClient;....
I am getting the error as
at _Default.rebind() in c:Documents and SettingsaMy DocumentsVisual Studio 2008WebSites oolbar1Default.aspx.cs:line 32
bind the dropdownlist to a datasource.I want my dropdownlist to display text from a database column and use the value field for some other purpose later on in code. I am getting the page displayed when i run the project but not able to get the data in dropdownlist
I have a dropdown list which I bind through a datasource. How can I inject a default value to it? My db doesn't have a default value and changes are not permitted!
I have a DropDownList in a DetailsView, which binds a user's 'AllocatedUser' to a user in the Users table. Occasionally, we'll have some mishaps in the database where the user allocated isn't in the users table, which the DropDownList is filled with. In this case the site crashes and we get a 'SelectedValue does not exist in the list of items error'.What I want to do is catch any binding errors like that, and just set the DropDownList index to 0. I've tried something like this:
i have a dropdownlist,which is dynamically binding from the database ............the problem is i want a particular item in the dropdownlist to apper first in the dropdownlist
I need to bind a dropdownlist to multiple column along with the column heading.. the heading should be unselectablesomething similar to thisEach group are in differnet tables..ow can i implement thisits consuming my time..
I have 2 dropdown lists on a WebForm. One of them is populated in the page's Page_Load event. This oneworks fine with the following code.
[Code]....
Then, after a value is selected from this list and a date is selected from a DateTime picker, then I click a button which is supposed to populate the 2nd dropdownlist. In the debugger in the button's click event I can see that the dataset is being populated with data, but then the list is never populated after the DataBind() method is run. Here is code from the button's click event.
Public Class State Public Property StateId As Integer Public Property Name As Dictionary(Of Integer, String) End Class
Name(x) contains the state name in different languages. I get a collection of State from the method StateManager.GetAllStates() and I want to bind this collection to a DropDownList. The problem is that I can't find how to set the DataTextField property to let's say stateList.Name(1) which is the english name of my state.
Dim stateList As StateCollection = StateManager.GetAllStates() Me.DataSource = stateList Me.DataValueField = "StateId" Me.DataTextField = "Name(1).Value" <-- Problem here Me.DataBind()
i am filling drop downlist from Sql datasource and textbox1.text=Dropdownlist1.SelectedItem.Value.ToString()
all working fine but if i set dropdownlist1.visible = false than textbox1.text = empty string I need to hide the dropdownlist1 and in the same time i need the selecteditem of dropdownlist to be in the Textbox1.text
How do I bind a result from a JSON string to a dropdownlist (I have 2 fields), "NAAM" should be DataTextField and "CODE" should be the DataValueField. Using ddl.Items.Add doesn't do the trick.
i am loading xml file from url and storing data into my database.i am binding that data with my dropdownlist bt the problem is wheneverr i select any option from ddl...by defaulst it takes the always takes first selected index...i.e value at the zeroth index value.....i really don't know what exactly the problem either the problem is with dropdown or the way i am loading xml file and binding it to dropdown.....below is my cs code.
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack)
I'm trying to bind a List<String> to a DropDownList in a user control. I think I'm doing the right thing, but it seems that after my code executes the bindings are cleared. Here's the code for review!
User control: <asp:DropDownList ID="subjectNameDropDown" runat="server"/> <asp:DropDownList ID="yearLevelDropDown" runat="server"/> Auto-generated designed code-behind: public partial class NewSiteMetadataUserControl { protected global::System.Web.UI.WebControls.DropDownList subjectNameDropDown; protected global::System.Web.UI.WebControls.DropDownList yearLevelDropDown; } Code-behind: public partial class NewSiteMetadataUserControl : UserControl { protected override void CreateChildControls() { subjectNameDropDown = new DropDownList(); yearLevelDropDown = new DropDownList(); } protected override void OnLoad(EventArgs e) { base.OnLoad(e); EnsureChildControls(); // Attempt 1 List<String> subjectNames = GetSubjectValues(); foreach (var subjectName in subjectNames) subjectNameDropDown.Items.Add(subjectName); subjectNameDropDown.DataBind(); // Attempt 2 List<String> yearLevels = GetYearLevelValues(); yearLevelDropDown.DataSource = yearLevels; yearLevelDropDown.DataBind(); } }
Should this approach work? If it should, how can I debug what happens after the code executes?
private void AddDBDataToControl(DataSet app_Support,int count) { int i = 0; while (count != 0) { DateTime dt = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["FromDate"].ToString()); //dt=23/08/2010 10:04:00 AM DropDownList h1 = (DropDownList)GVDate.Rows[i].Cells[1].FindControl("txthour"); h1.SelectedValue = dt.Hour.ToString(); DropDownList m1 = (DropDownList)GVDate.Rows[i].Cells[2].FindControl("txtmin"); m1.SelectedValue = dt.Minute.ToString(); DropDownList h2 = (DropDownList)GVDate.Rows[i].Cells[5].FindControl("txthourto"); DateTime dt2 = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["ToDate"].ToString()); //dt2=28/08/2010 14:25:00 PM h2.SelectedValue = dt2.Hour.ToString(); DropDownList m2 = (DropDownList)GVDate.Rows[i].Cells[6].FindControl("txtminto"); m2.SelectedValue = dt2.Minute.ToString(); count--; i++; } } When the function executes h1.SelectedValue = "10"; and m1.SelectedValue ="04"; but when it reaches to count-- h1.SelectedValue takes the value "14"; rather than h1.SelectedValue = "10"; and h2.SelectedValue = "14"; and m1.SelectedValue ="25"; rather than m1.SelectedValue ="04"; and m2.SelectedValue = "25"
The CreateDataset method that is called in the if..else statement is contains the following code. private void CreateDataSet() { SqlConnection caseConnection = new SqlConnection(strConn); caseSqlDataAdapter.SelectCommand = new SqlCommand("Select CaseID FROM Cases", caseConnection); caseSqlDataAdapter.Fill(caseDataSet); }
However when I load the page and as usual the condition that is supposed to bid the data is met, the gridview decides to displays as follows. Is it me or its the Datagrid?
So here is the problem , Is it possible to get the "SelectedItem.Text" of a binded dropdownlist? because everytime I'm getting null Even though I'm having items in the dropdownlist.
I'm getting the items that I want in the dropdownlist but I can't find out which one is selected.