Forms Data Controls :: Binding LINQ Results To Gridview?
Jan 6, 2010
I am trying to figure out how to bind my link results to a datasource so it can manage/update/edit/insert/delete without me having to do manual coding for all of it. Is this possible?What am I doing?I have used the LINQ to Active Directory to access our AD accounts. I need to make this a webpage frontend of basic search and managing functionality. I have it searching now and adding the results to a gridview but edit is not working now. I was looking online and I saw something about being able to bind linq results to a datasource and then using the datasource to manage all the information for me. Resources I am using:
BdsSoft.DirectoryServices.Linq[URL]
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Similar Messages:
Aug 11, 2010
I have a gridview that I want to bind the results of a query to it once a user selects a value from a drop down list.
The query selects the same row from the same table but selects different fields based on the drop down list value selected
I get to the query selection but it does not refresh that page with the populated gridview.
Here's the code behind code
protected void ddlQuantity_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection connection = null;
connection = new SqlConnection(ConfigurationManager.ConnectionStrings["PSI_DB_1ConnectionString"].ConnectionString.ToString());
connection.Open();
String nEstno = Request.QueryString["id"];
int id = Convert.ToInt32(Request.QueryString["id"]);
string SQLquery = "";
switch (int.Parse(ddlQuantity.Text))
{
case 1:
SQLquery = "Select Quan1"etc...;
break;
case 2:
SQLquery = "Select Quan2"etc...;
break;
case 3:
SQLquery = "Select Quan3"etc...;
break;
case 4:
SQLquery = "Select Quan4"etc...;
break;
case 5:
SQLquery = "Select Quan5"etc...;
break;
}
SqlCommand Cmd = new SqlCommand(SQLquery, connection);
SqlDataReader Dr = Cmd.ExecuteReader();
if (Dr.HasRows)
{
gvEstQty.DataBind();
}
Cmd.Dispose();
connection.Close();
connection.Dispose();
}
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Feb 12, 2010
i m binding data to Gridview using LinQ i need to sort the Gridview i have no idea how to sort cs i m using LinQ to Bind data with Gridview at Button Click.
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Jun 14, 2010
I'm not sure how to search for what I'm seeking, so I'm hoping to be pointed in the right direction.
I have 4 gridviews that contain the same 3 rows of data. For each gridview, I need to create a seperate gridview that will do some calculated values on the parent gridview like A3-A1, to put it in spreadsheet terms.
And at the very bottom I will have a total gridview control that will sum up each row from the parent gridviews. And under that gridview a final gridview to perform the A3-A1 calculation.
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Sep 2, 2010
Gridview is not being populated now that i built my objectdatasource in the code behind.. why. If i build the source on the aspx page and configure it that way, it returns results.. but when i try to build it in the code behind it just displays my empty template for the gridview.
[Code]....
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Jan 18, 2010
see the below code. just sample page.
<body>
<form
id="form1"
runat="server">
<div>
<asp:GridView
ID="press_dl"
runat="server"
AutoGenerateColumns="False"
PageSize="1"
ShowHeader="False">
<Columns><asp:TemplateField><ItemTemplate>
test head
test shortnews
</ItemTemplate>
<HeaderTemplate>
</HeaderTemplate>
</asp:TemplateField></Columns>
</asp:GridView>
</div>
</form>
</body>
Protected
Sub Page_Load(ByVal
sender As
Object,
ByVal e
As System.EventArgs)
Handles
Me.Load
If
Not Page.IsPostBack()
Then
bind_press()
' bind_events()
End
If
End
Sub
Sub bind_press()
ds = Nothing
ds = New DataSet
Dim query
As
String
query = "select top 1 * from tbl_press order by press_id desc"
myConnection.Open()
da = New OleDbDataAdapter(query, myConnection)
da.Fill(ds, "Press")
myConnection.Close()
press_dl.DataSource = ds.Tables("Press")
press_dl.DataBind()
End
Sub
its dislpayes like this
test head test shortnews
test head test shortnews
this gridview displaying twice. i dont know why.
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Mar 25, 2010
I have a gridview on a page with search boxes at the top.
The wildcard for these is % so in every serach box I set the default to be % so that when the page loads all records are shown and then they can be narrowed down by what you search for but when the page opens the gridview does not show all results.
Here is my code:
<%@ Page language="C#" masterpagefile="MainContent.master" title="Electrical Storage" EnableEventValidation="false" %>
<asp:Content id="Content1" runat="server" contentplaceholderid="Content">
<div id="Rightside">
<h2>Search Electrical Storage
[Code].....
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Dec 8, 2010
My sql statement is not functioning correctly. The gridview does post the items correctly but the results are not correct. Can someone assist me with the sql statement where I'm going wrong with it?
I only have one being reffer to the code because I was testing to see it work. Eventually, the search will be base on multi select and the selected items are going to the stored procedure to search for the proper records.
The following is the site code and sql code. -carlos
Site behind code:
[Code]....
[Code]....
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Jan 17, 2011
I am using visual studio 2010, asp.net 4.0 (c#)
My problem is:
How do I display results from my database on a gridview based on the selected row of another gridview.
For example, I have a e-shop web app and I have a product categories table in my database displaying the data on a gridview.
I want to be able to click on the select button on each row and use that event to populate another gridview based on the ID of the product category that is clicked. E.g say the 'CDs' row is clicked, another gridview shows all the different CDs.
As a result, I need the select(sql) statement for the second table to be dynamic based on what the user clicks.
Has anyone done anything like this before?
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Jul 10, 2010
I am working on a site using .aspx controls. Currently I am working on a search feature which searches my database of records and produces all applicable results to the search. Everything works as planned. I have recently added the EmptyDataText line to produce a specific output anytime no results are found in the database. However, I would like to be able to alter/change the appearance of the EmptyDataText output and cannot figure out how to do so. For example, if no results are returned from the search, I would like the EmptyDataText to produce an output of something along the lines of "Your search has produced zero results.
double check your spelling and try your search again." I would like to change the font color, font size, and possibly the thin box which is automatically produced around this output. Is any of this possible? If not, is there another way to produce the desired results? Ultimately, I would actually like to have the results actually use the terms which were input to the search within the EmptyDataText results when no search results are found within my database. For example, if "widget" was used as a search term and "widget" was not found within my database then i would like the results page to state something along the lines of: "Your search for 'widgets' did not return any results. check the spelling and try your search again." Does anyone know how to do any of these things using ASP.Net?
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Mar 14, 2010
I have a dataset that has two datatables. In the first datatable I have EmpNo,EmpName and EmpAddress. In the second datatable I have Empno,EmpJoindate, EmpSalary. I want a result where I should show EmpName as the label and his/her details in the gridview. I populate a datalist with the first table, and have EmpNo as the datakeys. Then I populate the gridview inside the datatable which has EmpNo,EmpJoinDate and EmpAddress. My code is
[Code]....
My Design is
<asp:DataList ID="Datalist1" runat="server" DataKeyField="EmpNo">
<ItemTemplate>
<asp:GridView ID="Gridview1" runat="server">
</asp:GridView>
</ItemTemplate>
</asp:DataList>
I do not get results in the gridview, instead have errors. I tried then placing the bound field
<asp:GridView ID="Gridview1" AutoGenerateColumns="true" runat="server">
<Columns>
<asp:BoundField DataField="EmpNo" />
</Columns>
It throwed an error stating / A field or property with the name 'EmpNo' was not found on the selected data source.
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Feb 24, 2010
I would like a gridview (using entitydatasource) to display the search results based on values provided in textbox txtSearch and dropdownlist ddlsearch. My search controls are as follows:
[Code]....
My entitydatasource is:
[Code]....
My gridview is written as:
[Code]....
Codebehind file contains:
[Code]....
I am a newbie at entitydatasource and have a few questions:
1. Currently, the gridview doesn't render. Why is that?
2. How do I wire up the gridview to grab the values of ddlsearch and txtSearch and return results using those values from my entitydatasource?
3. Ultimately, I want to encapsulate this gridview in a wizard step wherein the user checks items they want and those checked items are used in the next wizard step.
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Jun 23, 2010
I have a page where I will insert all the data into the database. The page where I'm having problems is when I select an item from the checkboxlist it only displays one item. The data which is displayed is only the one that was inserted with one selected item from the checkboxlist. The following code is the page I'm using to try to retrieve the data from the database. I am trying to do is when a user selects the first, second, or third, or fourth item. The corresponding data appears in the gridview. In my current code, the record which has one item selected appears. If the user has more than one selected it does not appear. It comes up as empty. Is there a way I can do it?
[Code]....
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Apr 1, 2010
Can i customize gridview to show Reuslt summary in the footer or pager like
[Results: 1- 10 of 2000]
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Apr 28, 2010
Working on a site where a user does a search, it takes the input from the user and then runs an SQL command to return the data in a gridview for the user to see. I also have a button where the user can see all the results from the DB (this will be taken out later but for now the DB is pretty small) This is all working fine, but the problem I am having is that when you look at the page source the gridview populates everything in tables on the page. This makes it really easy to just copy and paste and get everything from my database. How can I go about displaying the information to the user in a gridview, but hiding the table information in the html page source?
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Dec 10, 2010
I have a set of dataset with different column retrieved from DB. I need to present the datasets in one GridView (or other ListView etc...) without specifying the column_header. It should present automaticly since the GridView is bind to the DataSet.
In additional, I want this GridView to handle multiple rows edit and update the dataset, idealy, show data in textboxs in initially.How could I set the GridView to edit_model without hardcode column_header and textboxs in 'itemtemplate' or filed.
How could I achieve the bulk edit and update, so that I can assign 'mydataview1.table' to the dataset.
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Jun 17, 2010
I have 2 gridviews on a webpage that are fully editable. I also have a button, that when clicked, runs some SQL in codebehind to insert new rows into a data table. The gridview should then update with the latest results of the SQL query, which is does.
Then the user clicks on to the next page to do the next thing.The problem is, when they go back to the first page, they're still seeing the old, non-updated data. I've run the SQL from the page manually on the server, and the new data is there, but the GridView doesn't want to pull it.
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Mar 4, 2011
I have been trying to make this work for a while, but I have not been yet able to figure this put. I am using VS 2008 and mysql database. I wrote a query and checked to see if it works in database. It does.
I have a gridview, whose select command is that query. But for some reason, I just get all the rows from one table only. I rechecked my datasource and it is ok. I read on some discussions that it is NOT possible to have data from two tables in a gridview. Is that true? If that is not true, how can I have data from multiple tables in a gridview? Or any other web control for that matter.
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Jan 23, 2010
I have this LINQ query:
var agnts = (from a in db.agents select new { a.userid, a.name }).Take(10);
How can I get randomly get 10 records from my agents table?
I have tried:
agnts = agnts.OrderBy(n => Guid.NewGuid());
but this doesn't seem to do anything.
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Jan 20, 2010
im new to linq and im having lots of trouble creating complex queries.. My problem mainly is that i am using Linq as a BLL.
i created a dbml (with namespace called DAL) file with 2 tables with a one to many relation. Pop and City. There is a forgien key in pop that points to a city. I also created a class called Pop that inhertis DAL.Pop. Now in my ASPX page, i want to call a function in the Pop class that would retrieve some Pop according to its ID, but i need the city name as well.. Ive been going around this in circles for days. I dont know how to write the Linq syntax and i dont understandd how my function's signature should be like.. I want to recieve a table that i can bind to a Gridview and preferable, specify which coloumns to bind.
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Jan 20, 2011
I have a grid in 1st page and one link in it.If i click that link it should open a popup which has a grid and it should bind data according to the row information.In my grid its displaying columns evrything in popup but data is not displayed.
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May 11, 2010
I am converting a VB.net project to c#. I am trying to bind an xml file to a DataGridView, however DataGridView does not have a DataMember property. How do I set the Datamember in C#?
[Code]....
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Aug 2, 2010
want to achieve this below functionality
http://demos.mcmscontrols.com/ASPNET/Grid/Examples/Hierarchy/TwoTablesAtLevel/DefaultCS.aspx
I have my code snippet below for the xml shown. I am not able to get this working.
[Code]....
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Oct 27, 2010
I have a button called Next outside the GridView. If I click on Next, I want to highlite the 2nd row and display the details of the 2nd row below in panel. If again I click on Nextm i want to highlite 3rd row and want to display 3rd row results in a panel
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Feb 2, 2010
I've been reading around, and it sounds like this is somewhat common, though I'm missing something.
I have my filtering rerouted to my codebehind via DataGridSource_Selecting event handler per
http://weblogs.asp.net/scottgu/archive/2007/09/07/linq-to-sql-part-9-using-a-custom-linq-expression-with-the-lt-asp-linqdatasource-gt-control.aspx
I have a set of controls on my page, Start Date, End Date, User, Status
Start and End Date are expected to always contain a value
User and Status I want to also have an 'All' option, where in it would return all results/not filter.
One method I can think of using for this, is the put the queries in a If scenario, where
if(user == All), use linq query B
if(user != All), user linq query A
where linq query A contains the filtering on Users, and linq query B does not.
What I have so far is
[Code]....
What I need
[Code]....
where User == ??,
can the control that populates that contain a wild card option as well? ie *, so that if user == Name, it filters on Name, or if user == *, it returns all?
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