Correct The Sort Order Of Sql Dropdown List?
Jan 5, 2010
I am trying to correct the sort order of my ASP.NET drop down list.
The problem I have is that I need to select a distinct Serial number and have these numbers organised by DateTime Desc.
However I cannot ORDER BY DateTime if using DISTINCT without selecting the DateTime field in my query.
However if I select DateTime this selects every data value associated with a single Serial number and results in duplications.
The purpose of my page is to display data for ALL Serials, or data associated to one serial. When a new cycle begins (because it is a new production run) the Serial reverts to 1. So I cannot simply organise by serial number either.
When I use the following SQL statement the list box is in the order I require but after a period of time (usually a few hours) the order changes and appears to have no organised structure.
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Mar 17, 2010
If I have a specific order that I want to sort my List by, how do I do that? For instance, I have a list of items (coming from a database), with ID's ... and they come in order, i.e 1, 2, 3, 4. After receiving this list, I'd like to reorder the list above based on a specific order, e.g. 2, 4, 1, 3. How do I do this without complicate it too much?
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Mar 8, 2011
the specific example i am referring to is this site [URL] notice the sort by drop down list. basically i want to sort products according to price,name,popularity? do i have to requery the database and retreive the sorted data in gridview again, or should i already sort the items in the gridview that are already there? I tried to this but its the wrong approach, basically i was trying to repopulate data in the page load event, which was giving error.
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Jul 7, 2010
Is it possible to display the items in a dropdown list not by the order of insertion?
i want to display the orders alphabetically.
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Sep 22, 2010
I have a DropDownList inside the EditTemplateItem (if the user clicks edit) in a GridView.The DropDownList receives all available rows from the database. My problem is,if the user clicks Edit in the GridView to edit a row and opens the DropDownList Box the original item is not selected but the first one.That means the items are sorted. Have someone an idea how I can solve this issue that the right item / the original is selected if I change to edit mode of the grid view?
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Feb 7, 2011
The AjaxToolkit has a ReorderList. I'm searching for a jQuery solution that does the same and found this page. I would like to change the order of divs (vertically) and upload the new order to the database (ajax).
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Mar 7, 2010
Actually i want to ask which is the best for sorting in Asp.Net is it DataView.Sort Method or List<Object>.Sort() method.
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Mar 5, 2011
I try to sort a dictionary with no success
this code i wrote
var sortedDict = _GrandTotalUserDictionary.OrderBy(key => key.Value.Priority);
the dictionary looks like
"key1", new OrderItem(){title:'a', priority:1}
"key2", new OrderItem(){title:'b', priority:3}
"key3",
new OrderItem(){title:'c', priority:12}
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Feb 10, 2010
I have 2 tables with a relationship by EmployeeID (Employee, Cases)
The relationship name is Purchases (ie employee->Purchases), and iterating through it gives each row in order by date (entry order perhaps?).
There could be thousands of rows, so I want to present this collection in reverse date order.
Would I have to define a provider or repository to call instead of just Employee->Purchases?
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Mar 9, 2010
I am wondering if the aspnet_Users table is always sorted (by UserName) even if I add new users which are alphabetically between two already existing users.
I've noticed that the method Membership.GetAllUsers() always seems to return a sorted collection of MembershipUsers.
Also when I look into SQL Server Management Studio and run a simple SQL query without ORDERBY clause...
SELECT [UserName]
FROM [MyDb].[dbo].[aspnet_Users]
...I get always a sorted result list.
I'm still very unfamiliar with SQL Server but I expected that when I add a new row to a table it is (physically) appended to the end of the table. And when I run a select statement without ORDERBY the rows will be selected in the order they were initially inserted into the database (so without any specific sort order).
I am wrong I guess. But how does it really work? Is it perhaps something special with the aspnet_Users table?
I am happy that the MemberShipUserCollection returned by GetAllUsers() is sorted but is it always guaranteed?
Update
I've just noticed that the database contains a stored procedure called aspnet_Membership_GetAllUsers. This procedure actually contains an ORDER BY clause by UserName. So if this stored procedure is indeed always called when I use Membership.GetAllUsers() in my code (at least if I am using the SqlMembershipProvider) it explains why the collection returned by Membership.GetAllUsers() is sorted by UserName.
Remains the question: Is Membership.GetAllUsers() actually based on this stored procedure?
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Oct 22, 2010
How do I sort a data table based on a particular column which has integer values in ascending order?
I wrote this:
leadtable.DefaultView.Sort = "Id"
But it doesnt seem to work, it displays fine but when i get try to get the values of the sorted datatable in an array they dont come in an sorted ordere Datatble is defined as:view plaincopy to clipboardprint?
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Feb 2, 2011
My webGrid is working perfectly fine. However, I would like the default sort order to be in the opposite direction. If it were SQL, I'd be adding a DESC somewhere. Here's my working line of code:
[Code]....
It correctly sorts on the UWDate column, but I would like it to sort the opposite sort order. Of course, once it is displayed, you can click on the title and it will resort at that time.
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Apr 16, 2010
How to sort the dataset Values in Descending order , I have Followed the following way
decimal Length = 94;
decimal Width = 7;
decimal Height = 13;
DataTable dtCarton = new DataTable();
[Code]....
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Oct 10, 2010
I am stuck at this point "Displaying a dropdown list of Categories with a --None -- Option. I want the gridview control to display 2 dropdown list one in read-only mode and the other in edit mode. When a record is in read-only mode, the dropdownlist's enabled property will be set to false."When it's on a read-only mode, it doesn't display the selected Category. it shows but the "No Category". When i click on edit to edit or change category, it doesn't display the selected category.
The example is given below( I am reading the book Sams Teach yourself ASP.NET 2.0 by Scott Mitchell. page 628)
<asp:Label ID="UserIdValue" runat="server" Visible="False"></asp:Label>
<asp:SqlDataSource ID="picturesDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT * FROM [Pictures] WHERE ([UserId] = @UserId) ORDER BY [UploadedOn] DESC"
DeleteCommand="DELETE FROM [Pictures] WHERE [PictureID] = @PictureID"
InsertCommand="INSERT INTO [Pictures] ([UserId], [CategoryID], [Title], [Description], [UploadedOn]) VALUES (@UserId, @CategoryID, @Title, @Description, @UploadedOn)"
UpdateCommand="UPDATE [Pictures] SET [UserId] = @UserId, [CategoryID] = @CategoryID, [Title] = @Title, [Description] = @Description, [UploadedOn] = @UploadedOn WHERE [PictureID] = @PictureID">
<DeleteParameters>
<asp:Parameter Name="PictureID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="UserId" />
<asp:Parameter Name="CategoryID" Type="Int32" />
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Description" Type="String" />
<asp:Parameter Name="UploadedOn" Type="DateTime" />
</InsertParameters>
<SelectParameters>
<asp:ControlParameter ControlID="UserIdValue" Name="UserId" PropertyName="Text"/>
</SelectParameters>
<UpdateParameters>
<asp:Parameter Name="UserId"/>
<asp:Parameter Name="CategoryID" Type="Int32" />
<asp:Parameter Name="Title" Type="String" />
<asp:Parameter Name="Description" Type="String" />
<asp:Parameter Name="UploadedOn" Type="DateTime" />
<asp:Parameter Name="PictureID" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
<br />
<asp:SqlDataSource ID="categoriesDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT [CategoryID], [Name] FROM [Categories] WHERE ([UserId] = @UserId)">
<SelectParameters>
<asp:ControlParameter ControlID="UserIdValue" Name="UserId" PropertyName="Text" />
</SelectParameters>
</asp:SqlDataSource>
<br />
<asp:SqlDataSource ID="maxPictureIDDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:ConnectionString %>" SelectCommand="SELECT MAX(PictureID)
FROM Pictures
WHERE UserId = @UserId">
<SelectParameters>
<asp:ControlParameter ControlID="UserIdValue" Name="UserId"
PropertyName="Text" />
</SelectParameters>
</asp:SqlDataSource>
<br />
<asp:Label ID="cannotUploadImageMessage" runat="server"
Text="The photo could not be added to your album either because you did not specify a file to upload or the file specified was not a JPEG image with the file extension .JPG"></asp:Label>
<br />
<asp:DetailsView ID="dvPictureInsert" runat="server"
DataSourceID="PicturesDataSource" Height="50px" Width="125px"
AutoGenerateRows="False" CellPadding="4" DataKeyNames="PictureID"
DefaultMode="Insert" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" />
<CommandRowStyle BackColor="#D1DDF1" Font-Bold="True" />
<EditRowStyle BackColor="#2461BF" />
<FieldHeaderStyle BackColor="#DEE8F5" Font-Bold="True" />
<Fields>
<asp:TemplateField HeaderText="Picture">
<InsertItemTemplate>
<asp:FileUpload ID="imageUpload" runat="server" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"
ControlToValidate="imageUpload" Display="Dynamic"
ErrorMessage="There was no file selected" ValidationGroup="PictureAdd"></asp:RequiredFieldValidator>
</InsertItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Category" SortExpression="CategoryID">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("CategoryID") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:DropDownList ID="pictureCategory" DataSourceID="categoriesDataSource"
runat="server" DataTextField="Name" DataValueField="CategoryID"
SelectedValue='<%# Bind("CategoryID") %>'
Visible='<%# Bind("CategoryID") %>' AppendDataBoundItems="True">
<asp:ListItem Selected="True" Value="">-- Select Category --</asp:ListItem>
</asp:DropDownList>
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("CategoryID") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Title" SortExpression="Title">
<EditItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Title") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Title") %>'></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="TextBox1" Display="Dynamic"
ErrorMessage="you must provide a name for the title"
ValidationGroup="PictureAdd"></asp:RequiredFieldValidator>
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("Title") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description" SortExpression="Description">
<EditItemTemplate>
<asp:TextBox ID="TextBox3" runat="server" Text='<%# Bind("Description") %>'></asp:TextBox>
</EditItemTemplate>
<InsertItemTemplate>
<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("Description") %>'
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Oct 30, 2010
I am making use of an ASP.NET Masterpage. I have 3 tables as Columns in my Masterpage. The first table load then the second table that contains my "ContentPlaceHolder" and then table 3.How or what must I do to load table 1 and then table 3 and then lastly the table 2 that contains the "ContentPlaceHolder"?
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Jan 9, 2010
I have the following code for a gridview. When I click the Header, it can be sorted by ascending order. But if click the header again , it is still ordered by descending. What I want is that the sort order can be reversed when click the header again. How to do that?
protected void gvList_Sorting(object sender, GridViewSortEventArgs e)
{
DataTable m_DataTable = (DataTable) Session["gvListDatasource"] ;
if (m_DataTable != null)
{
[Code].....
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Feb 16, 2012
Here's my gridview when it comes it it's sorts on Age. Sorting is available for all columns/headers. How do I make the sort order to change on the ddsrpt sort to desc order when it's clicked?
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="SqlDataSource7" EnableModelValidation="True" Width="789px"
CaptionAlign="Top" Height="126px" BackColor="White" BorderColor="#DCBE68"
BorderStyle="Solid" BorderWidth="1px" CellPadding="4"
HorizontalAlign="Center" CellSpacing="2" Font-Names="Arial"
AllowSorting="True" EmptyDataText="No Records" DataKeyNames="FO,CLMSSN">
[Code] ....
I got this error message - Gridviewsortdirection is not declared
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Jun 16, 2010
For our website, we have decided we would like to maintain our user passwords as encrypted binary data in our database. We are using ASP.NET 3.5 to host our site and SQL Server Express 2008 for the database, both running on the same server. When a user logs in and submits a username and password, there will need to be some sort of encryption or decryption in order to verify the credentials. To me, it would appear that there are 3 ways to do this:
1)[C# Encyrption] On User creation, perform encryption in the Web App and submit the encrypted password to the database. To verify credentials at Login, perform the same encryption on the submitted password and ensure that it matches the value stored in the database.
2)[SQL Encryption] On User creation, submit the plain-text password to the database and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, have the database perform decryption on the password during the SELECT statement, and compare the plain-text submitted password to the one in the database.
3)[Mix] On User creation, submit the plain-text password to the database, and have it perform one of the SQL encryption variants during INSERT. To verify credentials at Login, perform the same encryption algorithm used by SQL on the submitted password ( is this possible? ), and ensure that it matches the value stored in the database.
Does anybody have an opinion as to which of these options is best? Number 1) is the most familiar to me, and would be the easiest to use with LINQ to SQL ( which is our current data model ), so I am leaning towards that. But if there are better options I would love to know about them.
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Aug 18, 2015
I want to orderby the list. Today date is on the top and then next date and all dates but when today date is passed then it comes on the end of the list. Is there any formal query in linq or some other code is used to achieve this?
08/01/2015
09/01/2015
but when today is passed then it automatically go to end and next today date is on the top
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Mar 31, 2010
the datatype in my database is Varchar, so that my gridview Sorting Function doesn't sort correct in sequence 1,2 3, 3 but 1,10,100, how can I sort in sequence 1,2,3,4 but no changing the datatype in database?
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Oct 22, 2010
How do I sort a data table based on a particular column which has integer values in ascending order?
I wrote this:
'Sort the datatable based on sequence id leadtable.DefaultView.Sort ="Id" But it doesnt seem to work Datatble is defined as:
[Code]....
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Apr 28, 2013
I have a datatable,columns are(User_id,Name,Address,DOB)
values like(12,abc,delhi,22/2/2000)
(14,pqr,mumbai,13/3/1989)
(8,klm,banglore,17/5/2001)
(9,asd,pune,12/9/1999)
Now I want to sort these rows on DOB in descending order..how can i do so?
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Oct 21, 2010
1 My DataTable Return following Data
Acct Books Annual
Acct Books Monthly
Acct Tax Income Tax
Admin GH Eqpt
Admin Offc Eqpt
Admin Offc Misc
Admin Offc Eqpt
[code]...
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Nov 3, 2010
I have 2 drop down lists.I have a very simple dropdown list #1 that diplays a title and holds an id value which is a GUID.I know it is getting this value and sending this value as I tested sending it to a label.I have the dropdown list #1 to autopostback to dropdown list #2 that "Is supposed to get" another title and value based on the GUID value of the first dropdown list. for some reason it wont return anything. I have done 100's of these but never based off a guid value.I assume the value needs to be converted to guid before selecting it in the second dropdown list.How can I do this? or is there something I am missing?
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Jan 19, 2014
I have a drop down list that has 11 items in it.
When I am processing, I have a Session field that has the value of "5" in it. The text for this is "APPOINTMENT".
I have made this the selected value for the drop down. When I try to get the TEXT for this field it is showing the TEXT for the 1st item in the drop down of "DECEASED".
Here is my code. I cannot figure out why I keep on getting the first value.
ddlStatus.SelectedValue = Session("strStatus")
Dim strStatus As String
strStatus = ddlStatus.SelectedItem.Text
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