Does DataGridView Always Depend On Public Properties For Column Values
May 26, 2011
At runtime, I have a collection of rows (Row class). Each of them consist of column values, represented by instances of a ColumnValue class. The name of the columns are determined at runtime, and are in a separate columns descriptor collection (Column class).I want to create a DataGridView that displays all Row instances. Of course, the DataGridView's columns shall be exactly those specified by the Column instances in the containing collection.But since DataGridView's columns can fetch their values from a list item's public properties only, and I cannot easily define such a property at runtime, I cannot use DataGridView to display the tabular data.
' Classes for table structure representation
Public Class TColumn ' describes my columns
Public Name As String
am trying to calculate the values in rows in column 6 based on values of column 5. Bellow is the the code I am using I get a run time error about the string not formatted properly
i have a datagridview on my form with customers info which is linked to my database. i want to execute a line of code based on the information in one of the columns in the datagridview??? for example i have a datetime column which stores dates(and maybe time) i want to use an if statement(or any code) to compare the date the customer entered. if its today then my code will execute!!
im trying to add the values in column for of my datagridview and display it in a textbox, but the calculation does not kick in unless two rows are displayed. if one row is displayed in the datagridview, then my textbox remains blank.[code]......
I need to display a column called Full Name in the my datagridview, but the datasource (datatable) does not have a FullName column. It only has FirstName and LastName columns. I'm setting up my DataGridView like this:
I have a datagridview in a form in windows application in which I have a column which accepts date values. In this column I want user to enter numeric values alone and when the user moves to next cell the value should get formatted to date type value(ex: 05/09/09). Similarly I have another column which must accept alphabets alone.
Rather using a DatagridView Column ComboBox i need in this phase of my project, to use a listbox outside the datagridview ,o pass values from listbox to the datagridview. I do not want these Values to be default in that, column of DGV but when adding new rows i want to pass different values,always form listbox to the DGV..
I have a DataGridView bound to a binding source. I have also, however, added an unbound column in which I plan on putting numbers calculated from the bound columns. The problem is, Any time I edit my unbound column (on any row), the value doesn't stay. If I programmatically edit the values, they never show up. If I type in the cell, then upon hitting enter or clicking outside of the cell, whatever I typed disappears.
i have a datagridview and in one of the columns i m storing the amount on button click...i want to add the values of the amount at that time only i have done this but it is displaying 0 in the required textbox total += Form1.DataGridView1.Rows(counter - 1).Cells(6).Value
I have a MainForm which contain SecondaryForm as a control of the MainForm.SecondaryForm contains DataGridView which loads data from sql server and I add a collumn named SUM that SUMs all the values of the same row. This is provided within the LOAD event of the SecondaryForm.When SecondaryForm.Load events finishes, the program goes back to MainForm right after the line "SecondaryForm.Show" and here the values of the column SUM disappear.When i write those values runtime, they never disappear.
i am doing a small project for my business and i got stuck with this 2 weeks ago and still no progress.
I have an access db table "store" that has columns: (filldate,brand,model,plateno,mileage,litres) where i am storing these info each time a car in my company fills gas. For example (8/25/2011,Renault,Megane,5487844,3943,20).
What i want to do now is to display in a datagrid the total consumption of gas (litres) with the kilometers driven (mileage) between 2 dates.
I have a list of servers in the first dropdown. I want to get list of all databases in the second dropdown depending on the server selected in the first dropdown.
For this I need to query each server while selecting the server.
I m filling values in DataGridView using following code [code]Can anybody help me to insert and retreive values from database in datagridview combobox column.
I'm using visual basic 2010 and i am able to import the raw data from excel and into my datagirdview but i am unable to get the code to add the values of raw data in column 2 and 3 and show the answer in column 5. Do i need to loop it?
The entire project is in the attachment take a look at it.
This is the entire code i have now:
Imports System.Data.SqlClient Imports System.IO Imports System
I have a datagridview that is populated from an Oracle 11g DB. What I would like to do is add the values of a column together and display the results in a textbox. What would be the easiest way to do this?
I've tried searching... a lot for the answer, but as I'm not too sure what exactly I'm trying to do I can't seem to find anything. I'm trying to write a dll in order to handle errors thrown from a vb.net app. In the dll I need several forms (I'm not totally sure if they can have forms - I'm a bit of a newbie when it comes to dll's) for which the user can type in their message about the error and submit it.
Within my application i have a PUBLIC customer class...
Public Class Customer Public Name As String Public Surname As String End Class
Then i decided to use LINQ to SQL within my application.After adding the MyDatabase.dbml class, errors showed up since LINQ creates public properties too
<Column(Storage:="_Name", DbType:="NVarChar(50) NOT NULL", CanBeNull:=false)> _ Public Property Name() As String Get Return Me._Name End Get
Here are some errors..'Name' is already declared as 'Public Name As String' in this class.'SurName' is already declared as 'Public SurName As String' in this class.
Ok. Thats logical. But what is the best-practice i should use in the future? I would not like to use the Name and Pluralization options mentioned in ScottGu's blog or rename the properties of my Customer class.
How dan I dynamically create some public properties on a custom webcontrol.
For example, web control has 5 TextBox controls. I need a public property for each TextBox control to be able to set a specific property of the TextBox control.
I want to be able to loop the controls in the webcontrol and create a public property for each TextBox control.
I am trying to create a Public Sub / Function that will allow me to pass certain variables into it and this will affect the output. e.g. DIV ID = InfoDiv CSS Class = "Warning" LBInfoMsg.Text = "An Error has occured" DIV Visibility = True or False
I would like to type something similar in the code behind page: InfoMsg(InfoDiv, "warning", "An Error has Occurred", True)
Public Sub InfMsg(ByRef MyDIV As System.Web.UI.HtmlControls.HtmlGenericControl, ByRef CSS As System.Web.UI.WebControls.Style, ByVal strMessage As String) strMessage = strMessage.Replace("'", "''") MyDIV.Attributes.Add("Style", "warning") MyDIV.Visible = "True" End Sub
I have to make a VB project for one of my college Co-Sci classes. However, I am having issues doing what I think is logically possible. Part of our project entails creating a user defined class, then create a form that then instantiates an instance of the object type. After that we are to list the item in a listbox. That is all well and good and works fine.
What I need help with is looping through each object in the listbox, getting some data from the object, then moving to the next.
I have been trying something similar to c++. For example, an object contained in a c++ array can be accessed like this:
array[index].someObjectMethod().
How would someone do something similar to that for objects contained in a VB listbox? I imagine it starts something like this:
I have a bunch of private variables I've typed out and I want to put all of my corresponding Public ReadOnly Properties in a bunch below them.Is there some way of copying ten lines of
Private _myVar As String
and pasting in ten sets of
Public Readonly Property MyVar As String Get Return _myVar[code]....
I'm currently copying the whole bunch of variable declarations, Find+Replacing Private _ into Public ReadOnly Property then going line-by-line expanding the definitions and writing return statements.how to avoid all this nonsense in the future, as I'm developing on a virtual terminal server, and the input lag on my little copy/paste/type operations on the code is driving me up the wall.
ok basically i was trying to make a Control that exposes its protected properties to the public. example, you could call the protected DoubleBuffered property publicly. the problem is that this class called ExposedControl must be compatible with the type System.Windows.Forms.Control, meaning i should be able to create an ExposedControl using an existing Control so i had something like this in the constructor.
Public Sub New(ByVal control as Control) Me = control
Can one client call a public property within a VB.NET module and see the value of that public property changed by another client accessing it at the same time?
[Code].....
I'm running into random instances where it looks like another client might be modifying (by setting) the value of GetSetDateTime DURING the first client's run through of WhateverMethod(). This is alarming to me and I've been trying to figure out if that's a possibility.
