Is it possible to select values from a List, where the items contain in a different list aswell?for example;
[Code]....
What I need are all the items from the first list "Items", where the string contains something from the second list "List".So I need something which returns the first 3 items (which contain the term "Item") from the first list.
I have the following one-to-many relation between two objects.
Parent
--> IList<Child>
Now, I have a List of Parent objects and I want the First Child of each parent in the list.
What is the best way to do this using Linq?
I see that dropdownlist has an "items" property to get the list of displayed items for a dropdown, but it doesn't seem to have an equivalent property for getting the "values" associated with the items. For example, I may have a dropdown that displays "High", "Medium" and "Low", but returns values of "H", "M", "L". How can I easily get that list of HML?
View 5 RepliesI have a situation where I want to show the selected records out of total records for a product of an employee
1) There is a checkbox list bind to <List> of objects from object datasource (For total items in list)
2) Now I want to check the selected items for a particular record in this list
3) For this purpose I have another list of <List> selected items returned by data access layer (For selected items for that employee )
4) How do I bind the selected objects with the total items list ?
5) In spaghetti coding model it was all too easy just by binding the checkbox list with a sql data source and running a for each on form load
I have the following Students class:
[Code]....
I need the 1 since it's a foreign key in another table. For the life of me, I can't get this to work like this.
Is it possible to set tab index value for list items of ASP.Net RadioButtonList control.
View 1 RepliesI'm designing my own custom control that contains a .NET dropdownlist. What I'm wondering is if it is possible to populate my dropdownlist with listitems placed in a placeholder? For example:
<asp:DropDownList ID="ddlFilter" runat="server" >
<asp:PlaceHolder ID="ListItemPlaceholder" runat="server"/>
</asp:DropDownList>
This doesn't work because the DropDownList control only allows ListItems as child controls. But, I want to do something similar to this so when the user includes my control on a page, they can do something like this:
<mytag:MyControl Mode="DropDown" runat="server">
<ListItemTemplate>
<asp:ListItem Text="C" Value="c"></asp:ListItem>
<asp:ListItem Text="E" Value="e"></asp:ListItem>
<asp:ListItem Text="B" Value="b"></asp:ListItem>
</ListItemTemplate>
</myTag:MyControl>
I know I can do this by dynamically adding the ListItems in the page code behind, but I'd like to avoid that if possible.
I am getting this error yet I know it to be untrue.This is the code:
ddlPartnerOrganisation.DataSource = agency.AgencyGetListOfEYDN();
string temp = ddlPartnerOrganisation.SelectedValue.ToString();
ddlPartnerOrganisation.DataValueField = "AgencyID"
;
ddlPartnerOrganisation.DataTextField = "AgencyName"
;
ddlPartnerOrganisation.DataBind();
Is it possible to assign a colour to a drop down list item based on it's value?For example: I have a drop downlist where I've got a bunch of items that have integer
values. I would like to highlight the items with values in 1000s in grey.
Here is what the list looks like:
list_item_name list_item_value
HEADING1 1000
HEADING2 1000
HEADING3 1000
item1 1
HEADING4 1000
item4 4
item5 5
HEADING5 1000
HEADING1 2000
HEADING2 2000
item2 2
item3 3
HEADING3 2000
HEADING4 2000
HEADING5 2000
I've boldified the items I'd like to be highlighted in grey ,For added complexity I need to highlight the items with values 1000 in a light shade of gray and items with values 2000 in a darker shade of grey. I'm using Web Developer, and C#
I want to have a default value/item of "---Select One---" and then list all of the values from the SQL statement. Currently I am having trouble doing this. I tried to add it to the List Item but it doesn't show on the page.
View 25 RepliesI have a table called 'Customer' that contains customer information. One of the fields is named "CustomerType". Each record in the 'Customer' table will contain the value of either "C", "I", or "O".
I have a form that contains a "check box list" named "Type". There are 3 values in the "check box list". The values are "C", "I", and "O". The user can select one or more of these values. I have a button on the form named "btnRunQuery.
When the user clicks on the button "btnRunQuery" I want to exectute a query that selects the records contained in the "Customer" table where the value in the field "CustomerType" equal the values the user selected in the "check box list". Example: If the user selected "C" and "O", then I want the select query to select all records that contain either "C" or "O" in the field "CustomerType".
I assume that what I need to do is to capture the values that the user selected in the "check box list" and put them in a variable. Then I need to format the "Where" statement in the query and add a "Parameters.AddWithValue" command.
I have customer data in MSSQL database. More than 1million records i have. I want to select a random 2000 records
from the one million record and do some manipulation. After manipulating the data i want to store that data to some other database.
How to achive it in c# and MSSQL2008?
I am trying to get a simple multi-page program to run correctly. I have everything set up, except for the "remove" function. When I try to remove an item from the list box nothing happens. Insted of trying to explain it I will show you the code...
Index
Code:
[code]....
ave a webpage that maintains a list of items. Each item is displayed as a simple short text string and has a int/string data value associated with it. At the moment I am displaying the list as a common separated string. I can generate the present string very simply from the result of a linq query:
string displayString="";
foreach (var i in linqResult) displayString = displayString + ", " + i.Name;
displayString = displayString.SubString(2);
However, I want to modify the page so that the user can remove any item (name) from the displayed list
I have two lists:
List<string> _list1;
List<string> _list2;
I need add all _list2 different items on _list1...
How can I do that using LINQ?
I want to show only 3 Products in a row in a list view. here is my code.
[Code]....
I have a dropdownlist in a formview that looks like this:
<asp:DropDownList ID="DropDownList5" runat="server" AppendDataBoundItems="True"
DataSourceID="SqlDataSource6" DataTextField="StaffName"
DataValueField="StaffName" SelectedValue='<%# Bind("LetterName") %>'
Width="155px">
<asp:ListItem Value=""> </asp:ListItem>
</asp:DropDownList>
I am trying to add the value from a textbox which is also in the formview into the dropdownlist as a list item. I currently have this code for it:
Protected Sub Formview1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles FormView1.PreRender
Dim dropdown As DropDownList
Dim listvalue As TextBox
dropdown = FormView1.FindControl("dropdownlist5")
listvalue = FormView1.FindControl("textbox1")
dropdown.Items.Add(New ListItem(listvalue.Text, listvalue.Text))
End Sub
This code works and adds the new item to the dropdownlist if I have no SelectedValue set for my dropdownlist. However when I set the selectedValue I get the error message:
"'DropDownList5' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value"
This is the bit I dont understand because the value does now exist in the list of items as it was added in from the textbox value. Does it try to do the selectedValue before adding my list item? If so how can I add the list item first, or do I need to set the selectedValue in the code after adding the list item?
Another niggling issule. I am trying to remove all the databound items from my listview but it doesn't work. I am trying to remove the items as i have used the delete command button (alongside with the updateand edit)
I have tried.
listview1.items.clear();
listview1.datasource = null;
listview1.databind();
But none of these have worked. I have also tried removing the item via it's index.
Im Using asp .net with Vb Coding.
I have to remove the list of selected items from listbox .
Dim i As Integer
For i = 0 To listbox1.Items.Count - 1
listbox1.Items.Remove(listbox1.SelectedValue.ToString())
Next
My doubt is If i run the page again the listbox shows the items which i deleted already.
I have an object, that has many properties but the only two to worry about are:
myobject.ID which is an int
myobject.Names which is a HashSet
Then I have a List of those objects that looks something similar to this:
List<myobject>
I use Linq to get a some of the data into a repeater, but I'm not sure how to get the list of Names and how often they show up.
Want to use Linq to avoid having to loop through the data.
As my tags should show, this is an ASP.NET solution using C#.
Some clarification:
Lets say I have just three items in my list:
Item 1 has John, Fred, Jack in its names.
Item 2 has John, Fred, Joe in its names.
Item 3 has John in its names.
I am trying to return the following:
John - 3
Fred - 2
Jack - 1
Joe - 1
Also, as a note I am familiar with having to write my own comparer for my object, I'm just missing the 'how to' for the overall solution in my thoughts.
I have a List in which I select users from db each time a sql query runs with certain value and selects one user in the time thus I cannot limit identical users in sql.
I have list with:
list[0] = "jerry"
list[1] = "tom"
list[2] = "jerry"
I want any (first or last doesn't matter in my case) to be removed from the list.
Here is my code which insert listbox items table and create record.
protected void Button1_Click(object sender, EventArgs e)
{
ListItem li = new ListItem();
System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();
conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" + @"Data source= C:Ruchitaweb" + @"WebSite527afcergonomic.mdb";
conn.Open();
for (int i = 0; i < ListBox1.Items.Count; i++)
{
li.Text = ListBox1.Items[i].Text;
}
OleDbCommand cmd = new OleDbCommand("insert into record(recorditem) values('" + li.Text + "')", conn);
cmd.ExecuteNonQuery();
conn.Close();
}
this is inserting in diffrent rows but i want this in one row with (,)so i can parse it and get it back which items user selected. and i also want to show messge box that show the record number.
Given the following code:
var myList = new List<string> { "red", "blue", "green" };
Regex r = new Regex("\b(" + string.Join("|", myList.ToArray()) + ")\b");
MatchCollection m = r.Matches("Alfred has a red and blue tie and blue pants.");
Is there a way to derive a List<string> of the "found" items ("red", "blue", "blue")?
I have a list of Key/Value pairs. basically its a List where ViewModel is a custom class of the form
public class ViewModel
{
public String Key { get; set; }
public String Value { get; set; }
}
In the View i would need to render Label and Textbox for Key and Value respectively.Im trying to use Html.DisplayFor() however it goes with model and only displays the properties of the model and not the list.I would like to achieve something of the format
<% foreach (var item in Model) { %>
<tr>
<td>
<%:Html.Display("item")%> [code]....
in one page i have list box on one button click i am showing on popup which is another aspx pagein that page showing one grid with check box now i want that when user select check boxes and click on add button selected items should gets added to list box on page when i click save button on page(not popup) all the records in that list box should gets saved to data base how to do this
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