I have a datagrid with check box that allows users select all rows in the datagrid. However, when the user check the check box and the page postback, the data in one of the columns disappears.
View 3 RepliesI have 2 grids gvParent & gvChild I would like to filter gvChild when a row is selected in gvParent the linking fields are contractNo
I added a column for selecting:
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Select"
OnClick="LinkButton1_Click" Text="Select"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
I know how to handle the filtering of the grid (create a criteria and set to rowfilter of the dataview) But, I dont know how to get the value of the column of the selected row.
I have Datagrid , i want to clcik on row and get data in textbox , but my textbox is FreeTextBox control,i tried to use javascript but work for asp.net control not working for freetext box control, how i can capture this code is sample code but it work for asp.net control but not working for my freetextbox
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Simply put... I want to duplicate the example found at this link, in VB.net rather than C#.
[URL]
I would like the selectedvalue of the dropdown to display additional data base on its selection in multiple text boxes.
I have tried using the DropDownList OnSelectedIndexChanged property, within a DataGrid EditiItemTemplate, but I cannot retrieve data from the selection. (AutoPostBack is "True"). I can however use a button onclick event to fire a "prre-defined" selection value.
I have 2 datagrid (using .net 1.1). I need to access column of second grid ( i need to make a column of second grid as disabled) when i click "Cancel" link button in First Grid. How can this be done?
View 7 RepliesI have "Order" object with Columns Ticket,OTP and CustomerName etc.Intially on DataGrid, I'm binding Ticket only , when user clicks on "Column Chooser" button, another windows appears to pickup CustomerName,OTP columns to add specified column dynamically on Datagrid. Environment : Asp.net ,C# with Object Data source
Public Class Order
{
publc void Order()
{
}
public string Ticket
{
get
{
return this.strTicket;
}
set
{
this.strTicket = value;
}
}
public string OtpNumber
{
get
{
return this.strOtpNumber;
}
set
{
this.strOtpNumber = value;
}
}
public string CustomerName
{
get
{
return this.strCustomer;
}
set
{
this.strCustomer = value;
}
}
}
}
I've been experimenting with caching objects with HttpRuntime.Cache and I was generally under the impression that if I "added" something to the cache like this:
HttpRuntime.Cache.Insert("Test", "This is a test!", null,
Cache.NoAbsoluteExpiration, Cache.NoSlidingExpiration,
CacheItemPriority.NotRemovable, new CacheItemRemovedCallback(FileChanged));
that the "NotRemovable" and "NoExpiration" flags would keep the object in-memory for the duration of the application. But was finding that at the end of certain page requests, the HttpRuntime.Cache would be completely empty!
Tracing thru and setting a breakpoint inside my Callback "FileChanged" I could see that indeed something was "removing" my object (and every other object in the cache), but I couldn't figure out why. So eventually, I started disabling other things that I thought might affect this subsystem.
Eventually, I commented out the line:
WebConfigurationManager.OpenWebConfiguration("~").Save;
I had been mostly retrieving data from "web.config" in the AppSettings region, but occasionally writing back to AppSettings and saving the changes using the above command. I knew from reading that the "web.config" is cached, but saving my changes back to it shouldn't flush all of HttpRuntime.Cache, right?
EDIT:
I've made this super reproducible if wants to try this on their own machine. (I'm running VS2008 Pro w/ MVC2 targeting .NET 3.5) Just start up a new MVC2 project and paste the following into the HomeController over whatever is already there:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Configuration;
using System.Configuration;........
Start-up the app in debug mode. Click on the "About" link. This loads a string into the Cache. Click on the "Home" link. String is pulled from the Cache and stuck in ViewMessage dictionary. Some key/value pair is written to web.config and saved. String from cache should appear on the Home page. Click on the "Home" link again. String should be pulled from the cache, but it's not. Stop program. Comment out the 3 lines that start with "Config". Restart the program. Try steps 1 thru 4 again. Notice how the HttpRuntime.Cache has not been emptied.
I had called the data from query to data table and now i have a gridview in which i am using one datalist and 2 text boxes and and reming coloumns are bounded iahve to assiaign them values which datatable have either null or any value.
View 2 RepliesI have a datagridview control that I'm using to display cache data to the end used on a web form. The issue that I'm having is that every time I re-run the application, and the cache data is re-generated... it loads duplicate data that's being displayed to the end user. I can't seem to figure out how to keep this from happening.
What I would like to have happen is that only unique data rows be returned and cached for the end user. Unless there are new data rows on the database that needs to be included in the cache data results...the previous data results should not be duplicated. I've tried to change a few properties on the datagridview control, but nothing seem to keep this from happening.
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How to set value to datagrid using vb.net? only for specific column but is for every row.
View 3 RepliesI have a problem there that is i want to insert the data in database from datagrid but i have various controls like textbox and datalist in grid view inside datagrid now i want to insert the values of that text box and datalist in database how i can do this.
View 5 RepliesI have to include a button 'del' in my datagrid. I already have two buttons 'savechanges' and 'cancel'. how to include one more option saying DEL in the same datagrid?
View 4 RepliesI am new to asp.net programming!!I have a datGrid Control on my web page and am able to load the data into the datagridafter loading the data to the grid , when i select a row from the grid I am loading those values into the text boxes that are present on Now what the problem , if my grid has say 20 records and having the vertical scroll to view all the 20 rows.
When i want to show the data of the 16 row ( say in this instance ) after scrolling the down for the 16 row ...after selecting the 16 row the data is getting posted to the corresponding textboxes ,but the here the data is getting scrolled to top after selection and not able to see the seleted row , for this i need to scroll down again!!!
I have something
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in back I have
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not IsPostBack() Then
LoadDataGrid1()
End If
End Sub
Private Sub LoadDataGrid1()
Dim tmpds As New DataSet
Dim tmpdv As New DataView
tmpds = boNews.getSelectedList(1, Format(Now(), "yyyy/MM/dd"))
' tmpds = boNews.getTodaysList(Format(Now(), "yyyy/MM/dd"))
tmpdv = New DataView(tmpds.Tables(0))
DataGrid1.DataSource = tmpdv
DataGrid1.DataBind()
End Sub
I only get the HeaderText not the BoundColumn.
how to reorder a datadrid, by moving one row up or down.
View 1 RepliesI notice that the DataGrid control has properties for "SelectedRow". What I don't understand is how to select one. Nothing looks clickable when I'm viewing my datagrid populated with data, it just looks like a static table of information.I need two things to happen. 1, as they move their cursor over the rows, I need the row to highlight. 2, when they click a row, I need to fire an event so I can run an SQL query based on the row they clicked?2 questions.1. Is it possible for a DataGrid to do this.2. If it's not possible, what should I be using instead?
View 20 RepliesI have a table in my database with three fields: COURSE_ID, PERC, DATE.I need to display sets of rows based on the date, the number of rows in every set will be known at run time, the same as the number of sets, so I was thinking about adding two buttons (one to add a set and another to add rows in that set)
I know that working with GridViews will do, but do not know how exactly, maybe one gridview for the sets and a second gridview (inside the first one) for the rows inside the sets.
<Add Set>
<Add Row>
Set 1
COURSE_ID PERC DATE
2 10 2010-12-02
3 90 2010-12-02
Set 2
COURSE_ID PERC DATE
3 90 2010-12-10
4 10 2010-12-10
Set 3
COURSE_ID PERC DATE
3 80 2010-12-15
4 5 2010-12-15
5 15 2010-12-15
Set 4
COURSE_ID PERC DATE
2 100 2010-12-18
I am contineously facing this problem Datagrid does not respond to any sorting, dataview filtering, or paging events.
View 4 RepliesI have to delete my last row in a datagrid.
View 2 RepliesI have a datagrid which pulls data from a single database table to display it. However, this database table also contains information on the thumbnail URL for each record, and I would like to display the thumbnails for each record in the 1st column of the datagrid.
At present I have added the following to my datagrid:
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So I presume the main challenge now is to set the Thumbnail.ImageUrl property to the correct file path in the VB.NET code. But how do I do this for each record? I am using a function to retrieve data for the gridview, which is based on the following:
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I am having an issue with a simple databind to a datagrid. What happens is that for some reason, the first character of the data going into the 4th column is getting placed at the end of the data in the third column; but only on the first row. Here is an example of what I mean:
Form ID
Employee No
Associate Name
Start Date
End Date
Form Status
1234
5000187
Stan Marsh1
1/16/2010
11/30/2010
Approved
1234
5000187
Eric Cartman
11/16/2010
11/30/2010
Approved
1234
5000187
Kyle Broflovski
11/16/2010
11/30/2010
Approved
As you can see, in the first row of data, a "1" has been moved from the Start Date column to the Associate Name column. Because this is a databind I don't see how this is even possible. I'm just curious if this is a known issue or just some random fluke. Here is the relevant code:
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check the VB behind code for any syntax errors.Unable to add new rows of data to a database using the DataGrid control.Compilation Error message is located at http://cforedu.com:View snap shot images of each line error at http://cforedu.com/snap.pdfThe VB code behind reads (revision 1.3):
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I have a web application that takes information entered by the user and displays it in a few datagrids, that are located withing a multiview.
In order to enter a row to a datagrid the user enters some information and clicking on a button calls a function that adds the data to an arraylist, which is the source of the datagrid. In addition, every postback the data is binded to the datagrid.
It all works fine in the first time, but from the second row and on it enters only parts of the data and ignores the rest.
I am doing when the form loads up
DataGridViewComboBoxColumn ComboTextCol = new DataGridViewComboBoxColumn();
ComboTextCol.Headertext = "some";
ComboTextCol.DataSource = GetEmployees().Select(e => new { Name = e.LastName + " ," + e.FirstName, ID = e.EmployeeID }).ToList();
ComboTextCol.ValueMember = "ID";
ComboTextCol.DisplayMember = "Name";
datagrid.Columns.Insert(0,ComboTextCol);
I tried this too datagrid.Columns.Add(ComboTextCol). GetEmployees gives employee data I see the column but not the the data...??
I have a DataGrid bound to an ObjectDataSource, as you know once the DataSourceID on DataGrid is set, data binding happen automatically without any coding. But due to requests from end users, I need to prevent the data binding when the page is loaded the first time, i.e. data binding should only happen during PostBack. How do I do that?
View 3 Replies