Asp.net - Why Is GridView FooterRow Referencing The Wrong Row
Aug 26, 2010
I have a GridView and, using a fairly common method, I'm using a FooterRow and TemplateFields to provide the missing insert ability. So far so good.The footer contains a TemplateField with a LinkButton to provide the postback that does the insertion. In the handler for the LinkButton's click, the Insert() method is called on the ObjectDataSource that the GridView is bound to. The ObjectDataSource's insert parameters are populated in the handler for its Inserting event. The code for all of this (abridged) looks like this:
Markup:
<asp:GridView ID="gvComplexRates" runat="server" AutoGenerateColumns="False"
DataKeyNames="id" DataSourceID="odsComplexMileageRates"
EnableModelValidation="True" ShowFooter="True">
<Columns>
[code]....
The first of these shows a tag of td. Which makes sense. The second shows text of "10" which is the content for the row above the footer.
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Apr 17, 2009
datasource to gridview.I have to populate gridview by adding footerrow.I have given visibility of footerrow as true.So one error is coming as 'Object not set to an instance of an object'.what may be the reason for this?Actually i need to add data into the Gridview through the FooterRow.After inserting a few records,i need to insert this data into the database.So, i want this Gridview only to insert data into the database.For a particular "FileID", i have many records,thats why i am using Gridview.Is there any other method for this?
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Jan 9, 2010
I' working on an Office Supplies website for a college course I'm doing. I have most of the website created, I'm just working on the shopping cart element of it now.When the user goes to check out, I have a Gridview displaying the items the user wishes to buy as follows, it contains 3 columns, REF NBR, Product Name and Quantity, when the user clicks on the 'BUY NOW' button I want to take all the reference numbers from the Gridview and search teh database and deduct the Quantity from the number of items in stock.
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Aug 4, 2011
I have a searchbox and when I search for a record it is fine the records shows up however once I click edit on the gridview the page does a postback and all the records show back up with the first record selected for editing. How can I disable this post back or make it when I click edit all the records do not display again?
VB.CodeBehind
Protected Sub btnClear_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnClear.Click
txtSearch.text = ""
sourcegridview.DataBind()
End Sub
[code] .....
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Feb 25, 2010
Dim tabnum As Integer = mycontrol.TabIndex
If My.Forms.Sessions.GroupBox1.Controls(tabnum).Enabled = True Then
mycontrol.ForeColor = Color.Red[code]....
I have checked and double checked the tab order on the controls and run traces with debug. The control found in my.forms. sessions. groupbox1 seldom returns the proper tab. Using a 'watch' I can see the tab names and the tabname (my.forms.sessions. groupbox1. controls (tabnum).name is often the incorrect one.
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May 1, 2010
This is driving me out of my mind. My Gridview returns the wrong rowindex after sorting or filtering. I am using a detailsview to edit the selected record however I found out I was editing the wrong record. I am using this statement to retrieve the selected record from the gridview
DetailsView1.PageIndex = GridView1.SelectedRow.DataItemIndex however this only returns the correct index if the grid stays in the original form, meaning not sorted or filtered. I guess the statement returns the index with respect to the gridview not the actual table. First of all is this this a .NET bug? and second of all how do I retrieve the correct record to edit it in the detailsview either by getting the correct index or a key such as AssetID in my case. I am using VisualStudio 2010 Professional and the code is in VB. Please do not give me C# as I don't use it.
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Jan 12, 2010
I've got a DataGridview I want to remove columns from as it greatly increases performance when I format the DGV. The first time I remove columns in a loop (using the removeat) property, everythings fine. But when I try to remove more columns in another loop, it appears to remove the wrong columns and displays the wrong data. In other words, it displays the wrong data and headers; and the columns it does show has headers and cells that don't match.
[Code]...
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Dec 6, 2010
How to show pop up menu from database in gridview on each gridview row items ?Example of this is : http:[url].....Move your cursor to Departure time and arrival time...a want this type of popup in gridview items....which fetch entries from database..
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Sep 24, 2009
In my application,i have a gridview in which columns are created at runtime.Actually these columns are created when i am entering data in a database table.[code]where Column1,Column2,column3 may vary during runtime.i need to enter values to these columns during runtime.But i cant bind these columns because these are created during runtime.The first column "Description" will not change.It will remain constant.For each description, there will be values for each column.At last these data will be saved to the database.How to add columns in the gridview during runtime?
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Sep 23, 2011
I am able to export a gridview to excel, my problem is that I cannot figure out how to remove the formatting from coming over from the girdview. Here is the code I am using to export the gridview: Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]....
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May 25, 2009
I have a modal popup that contains a gridview. On the click of a button inside of a grid i reload the gridview with the data that depends on the id of the row clicked in the gridview. I would have like to reload the gridview onclientclick but I couldn't find a way to do that. Is it possible to reload a gridview client-side without the user even knowing the page partially loaded?
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Apr 24, 2012
I am a self-taught noob and have been given the task of developing someone elses code. I have rebuilt someone elses solution into my dev machine and able to run with some minimal bugs. I don't know where to add an .xls file into my solution
System.IO.FileNotFoundException was unhandled
FileName=TestRec.xls
Message=Could not find file 'TestRec.xls'.
[code].....
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Apr 25, 2010
I have a line of VB code which looks like this : If GroupTagDropDownList.SelectedValue Is "1" Then The system doesn't throw up any errors for it but the statement doesn't appear to work.
I think that the problem must lie in how I've referenced the '1' value - I've tried putting single quotation marks around it but it appears to make no difference at all.
There is definitely a value in the drop down list of value '1' but it doesn't appear to be read at all.
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Sep 9, 2010
I have been given a .dll file (implemented in C++) that I want to use in my VB.NET application.When I try to add a reference to this dll using Visual Studio I get the following error:A reference to 'path-to-dll' could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component.
Based on this error I concluded that I need to register the dll. Since it has been implemented with unmanaged code I tried to use the regsvr32 tool to register it. But when I try to register the dll using this tool I get the following error:Name-Of-DLL was loaded, but the DllRegisterServer entry point was not found. This file cannot be registered. how do I add a reference to this dll in my VB.NET application?If I have to register it, how?
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Aug 10, 2011
Imports System.Runtime.CompilerServices
Module StringExtensions
<Extension()>
Public Sub Print(ByVal aString As String)
[code].....
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Sep 28, 2010
I need to reference a C++ dll from my Java project. The method that I need to expose is actually written in Visual Basic. Is there any way to access the Visual Basic code in C++, so that it can eventually be accessed in the Java project?
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Dec 7, 2010
I have a java class that is used to for ssl connections to a web server. I have got some of it converted however there are serveral java libraries that i have been unable to figure out how to call or reference in vb.net. First off i'm not even sure if it's possible to reference them. In Java code they look like this:
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.DataInputStream;
[code].....
I'll use the last one for example: I get a "Namespace or type specified in the Imports 'org.xml.sax.SAXExeption' doesn't contain any public member or cannot be found. make sure the namespace or the type is defined and contains at least one public member. Make sure the imported element name doesn't use aliases.
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Jun 15, 2010
I have a DataGridView that is being filled with data from a table. Inside this table is a column called 'group' that has the ID of an individual group in another table.
What I would like to do, is when the DataGridView is filled, instead of showing the ID contained in 'group', I'd like it to display the name of the group. Is there some type of VB.net 'magic' that can do this, or do I need to cross-reference the data myself?
Here is a breakdown of what the 2 tables look like:
table1
id
group (this holds the value of column id in table 2)
weight
[code]....
BTW - I am using Visual Studio Express.
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Apr 19, 2011
I've been poking around in some projects written by one of our contractors, and he seems to be storing a lot of settings in the main "app.config" file for the application, using, for example:
<add key="SomeClass/SomeValue" value="False"/>
And then referencing the key value in the "SomeClass" class in "SomeProjectLibrary" using
ConfigurationManager.AppSettings.Get("SomeClass/SomeValue")
While this works, I guess, it also pretty much sucks. I was wondering if anyone knew of some more elegant way of creating variables in the "app.config" file, which could then be used across various applications within a Solution?
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Jun 11, 2012
I'm developing an app in which there's hundreds of different calculations involved and would like for my app's admins to be able to tweak these calculations by specifying the formulas.For example, my database table contains price and quantity. One of the columns 'X' might contain "(price * quantity) over the past 7 days". How can I allow my app's admins to change the calculation from "7 days" to "14 days"?
Is there some way to make calculations dynamic within VB.NET or do I have to rely on stored procedures and write some code to alter those procedure if a change is needed? What are the best practices in this type of a scenario?Ideally, I would like to use something similar to the "Tags" box used when posting questions on here to bring up the available fields and add mathematical operators in between them to perform calculations. It might be adding more complexity, but would be great if an existing calculation isn't overwritten so that it could be used in building a new formula.
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Jun 30, 2011
I was directed to update an old VB6 dll to VB .net as we are moving away from COM objects. The dll contains one function that does a bunch of high math calculations. I opened up a new class project in VS 2005, Imported System.Math, and then basically copied the function code from the VB6 project into the new class. When compiling, I made the assemble COM-Visible and also checked the Register for COM Interop in the project properties. I then copied the dll and tlb files to Windows/system32 and tried to register using Regasm.exe.
Even though I'm using the correct version for .Net 2, I still get error RegAsm : error RA0000 : Failed to load 'C:WINDOWSsystem32eagetairmiles.dll' because it is not a valid .NET assembly. When attempting to add a reference to it in my new .Net project, I see it in the COM tab - but in the location it was developed in, and I receive the following error: Converting the type library to a .Net assembly failed. Type library mydllname was exported from a CLR assembly and cannot be re-imported as a CLR assembly.
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Feb 20, 2009
how to create a class yet, and I think I need to learn how.I am wanting to shorten my code in a form, thinking of creating several classes to do so.Lets use a Listview as a reference if you dont mind.Say there is a listview, you have a numeral amount of if statments to fill by. Is there a way to create a class(is this the way to go) so that you can open the class to modify that specific block of code? Example of questionYou have multiple items you need to add for each if statement. Animal as a group Dog as an item 14 years as a sub item Cat as an item 11 years as a sub itemIs this the way to go, if so how do you create a class and call it from a form?Davids Learning
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Mar 15, 2010
Ive have a listview on my form and need to populate it with data from my Table called "tblCustomers". However I need to only retrieve records based on field that is populated with data called "Joe". In order for the SQL syntax to retrieve the name "Joe" then the SQL syntax needs to reference the Label on the form called "lblName" which will have the name "Joe" as the caption.
How can my dataset have SQL data that references my label object on my form?
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Jun 25, 2010
i have just installed Visual Studio 10 and DirectX SDK (June 2010), however i can't seem to add directX as a reference. I have also tried Direct X SDK (march 2009).
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May 31, 2009
I am currently working on an application that is about 90% finished, and we just got an addition that requires us to create a new project in the solution. My question is, I have a bunch of classes created in the main project that deal with the database, and it has a lot of functionality that I could really use in this other project.
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Nov 18, 2011
I am building application that will be hosted as a web service. This app takes an employeeID and returns an employee object that contains lots of info regarding the employee. (name, status, full-time/part-time, etc)I want the two existing apps we have (and more to come) to be able to call a method that the web service will have and return the employee object. (also at time this web service that returns the object may have new fields added to it - Pay rate, etc)How would I go about creating a new object from this web service reference in the existing applications.Would I decalre it like Dim Employee as new emp_webservice.employee? And then be able to use this object within the app? Or would the better practice be to also included the same class files? It seems like this would not be the way to go, since if I make a change to that class I then have to make it in all places.
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Jan 9, 2011
I have compiled a C# class as a .dll named TileCalculations.dll Within the Class its namespace is TileCalculations and the Class is TileSystem
namespace TileCalculations
{
static class TileSystem
I have attempted to add this to a vb.net poject using Project > Add Reference and navigating to that file and selecting this dll. I see the dll in my Project Properties Window and the Local Copy property is set to True.
I have included the following:
Imports System.Net
Imports System.Diagnostics
Imports System.IO
[Code]....
How do I call the function MapSize. I am trying;
Dim intmyValue As Int32 = MapSize(17) ' should equal 33,554,432
I get a message 'MapSize' is not declared. It may be inaccessible due to its protection level.
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Jun 26, 2011
MyProperty is just a property defined in another class. However when I try to reference that property as shown below I get an 'Identifier expected' error
This works:
TDTL.DataTopLevel(FileNumber).DataSet(FileDataSetNumber).MyProperty = TempVar
This does not work:
dim poo as string= "MyProperty"
TDTL.TireDataTopLevel(FileNumber).TireDataSet(FileDataSetNumber).(poo) = TempVar
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Mar 1, 2010
This is a project I am working on written in Visual Basic, using Visual Studio 2005.I have a form (FrmMain) which contains a user control (CtrlDisplay). Within the user control (CtrlDisplay) is a list box which pulls information from a database. when you click on a button it checks another database to see if you have all the required components to build the object in the list box. If you dont have the parts, a dialog box (DiaAddToList) opens up to ask you if you would like to add the missing parts to your next order.
I had this all working perfectly when I was using forms and a MDI parent container. Now I am using a single form which swaps out user controls. the issue I am running in to is, the dialog box has the button "Add to next order", which is supposed to start routine to add the objects to the inventory. using forms, it was easy to do this, on DiaAddToList, under the sub when you click the add button, the code was FrmDisplay.AddList()
Now that I have switched it to user controls I tried to put CtrlDisplay.AddList(), and it is telling me "Reference to a non shared member requires an object reference". How do I reference the CtrlDisplay. It is already open and running on FrmMain. I tried to use "Imports.MyProject.CtrlDisplay" and that didnt work.
how I can reference this? It is starting to look like I will have to put the list boxes and routines into FrmMain, but that will end up with something like 200 boxes on one form, all overlapping and making it REAL confusing.
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Mar 24, 2009
I am very new to VB and trying to understand Array's. I am having trouble referencing the contents of the Array in other areas of my application and I ma getting object Reference Errors and the contents of the Array appear as Nothing and I get a null reference error.
The Array is being loaded from the Sequel Server and I am adding two columns to the Array to add data. I am getting all of my Array in the Return Array, however I acm unable to reference contents of the Array and write out the contents. I need to reference the contents.
The Array is called MyArray, and I need to reference each part of the Array as MyArray(irow,1) for example.The irow will always vary but I will always have 10 columns. How can I reference the Array in other parts of the application? I tried dimensioning the array at the Class Level, but the array shows nothing in it.
My Code here works and the Array Returns with all of my data that I need all ten columns, but I can't reference the pieces of it elsewhere in the application in another button event in a Private Sub or Public Sub.
[Code]...
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