i have grid view with column ..price ...
Sno. Product price ($)
1 Pencil 1
2 Rubber 3
3 sharpner 2
I want to calulate the price column .... means //// i want to calculate the cells in Price column of GridView .....
the reult of price will be shown as 1+3+2 = 6
I am a newbie in VB.net(programming). I need your advice regarding Gridview control.
I have a gridview loaded with two columns-one column(Name)is with some Text,another(Price) is empty.
I have got a TextBox with the data of Name and Price.
Now,I would like to loop through the Textbox,and see if the Data/symbols of the Column(Name) of GridView Control matches with the Data in Textbox.
If the Names of the GridVies First Columns data matches with the names of the Textbox,then the Price data should be fetched in the Second Column(Price) of GridView.[code]...
I want to multiply or add the values of two or more cells in a datagridview control in a row and and should also be auto-saved in the database after entering datas in the cell. I am using SQL Server 2008 for my database.
View 32 RepliesMy Gridview has following Fields
ID Product Price ($)
1 Pencil 1
2 Pen 1
3 Rubber 2
I want to calculate the total price of price fields in Gridview Footer ...ie..
Total Price = 4
How to do it using VB.NET ?
i have to modify an asp.net application. The app consists of an huge gridview with lots of javascript, controls and cell modification (color cell etc.) in it. Now i have to modify the gridview to add some more colums. Lot of code is based on identifying a cell based on its index e.g. row.Cells(1). Is there way to optimize this behaivor? I dont like the thought to add a colum in the middel and then increment all indeces to match the new positions.
View 1 RepliesMerge Cells in Excel Export From GridView?
View 1 RepliesI have a GridView which is showing results and from which I am deleting a result using the auto-created delete link. My code behind to remove the row and associated info. is:
Private Sub GridView1_RowDeleting(sender As Object, e As System.Web.UI.WebControls.GridViewDeleteEventArgs) Handles GridView1.RowDeleting
' The deletion of the individual row is automatically handled by the GridView.
Dim dbDelete As New pbu_housingEntities
' Remove individual from the bed.
[Code] .....
It seems that it is not able to grab the row that is being deleted, so it is always giving me a "Object reference not set to an instance of an object" error.
VB GridView control will not allow code in the vb code file to access a data column that has its visible property set to false. When it is set to true, the data column can be accessed with no problem. Any suggestions as to how to correct this? I have looked through the documentation, text books, and I have not found anything that gave me any clue as to what the problem could be. I thought that the property was just applied to the column, not that it would remove the column from being accessible.
[Code]...
I need to render a datagrid with different kinds of cells in the same column. For example, I have a datagrid with a column "name" and a colmun "value". Depending on the "type" of my record, I would have different cells in the column "value" like a combobox or a simple textfield. and I don't really see how to do that programmatically... I don't know if the datagrid is the best choice. I'm using asp.net/vb.net with framework 3.5
View 1 RepliesI have a DataGridView binded to a DataSet that I created using the Visual Studio Data Source Configuration Wizard. Everything works good except for one problem.I have two columns, Modified_By and Date_Modified that should be inserted or updated as the user and the current date, respectively. So every row in the DataGridView should have the same value for these two columns.So far, I have thought of two ways to get this working, but neither one seems very clean. The first idea is to make a custom Fill method that takes as parameters the user and the current date and then add them as extra columns in the select method. For example
View 1 RepliesDim cmd As New SqlCommand(SQLSTR, conn)
reader = cmd.ExecuteReader()
Dim myDataTable As New DataTable
[code]....
i hve the follwoing code by which i bind the data to the grid the grid has 4 columns PRODUCTNAME, QTY,RATE, AMOUNT the user shld be able to edit the data in the column qty for as many rows it has but i m not able to edit this column how do i edit the values in the cells of column(1) ie qty?
How do you loop through a name column in a DataGridView? What is the collection? The following below does not work.For each X in DataGridView.Columns("Name")Next
View 12 RepliesI have a datagridview with several column header cells “merged”. I’m using the paint event to achieve the merged effect as shown below.
Private Sub tblEnv_Paint(ByVal sender As Object, ByVal e As PaintEventArgs) Handles tblEnv.Paint
Dim brb As New SolidBrush(tblEnv.ColumnHeadersDefaultCellStyle.BackColor)
[code].....
I want to perform some simple auto-formatting to the cells in my GridView. So far, I have the following code:
Private Sub gridviewRefreshPanel_RowDataBound( _
ByVal sender As Object, _
ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) _
Handles gridviewRefreshPanel.RowDataBound
[Code]...
The problem is my first' row cells values are their owner's column header text.
Ex.
-----------------------------------------------------
ID | FirstName | LastName | Address |
-----------------------------------------------------
ID | FirstName | LastName | Address |
[code]....
The code below updates all cells in a DataGridView column to a value from a textbox. This code works in that all cells in the desired column are updated on screen. The DGC is bound to a dataset. The problem is that when I call the dataset .Update method, sometimes the first row (row 0) does not get updated. I have run SQL profiler and can see that no SQL update command is submitted for the first row. The first row only gets skipped the first time the update is run after launching the app. Subsequent updates run for all rows, until the app is re-launched.
I have verified the row state is Unchanged with: Msgbox(DataGridView1.Rows(r).State.ToString).
The 2 commented lines below are other things I have tried that still cause the first row to be skipped.
Private Sub btnUpdateAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdateAll.Click
If IsNumeric(Me.tbUpdateAll.Text) Then
[Code]....
I have a DataGridView with SelectionMode = "CellSelect". I do this because I want the user to be able to click the Column Header and drag the column to a different DisplayIndex. They move the column by clicking and holding down the left mouse button, then moving the column. I also want the user to be able to click the column header and all the cells in the column would be selected. But if I change the SelectionMode property to "FullColumnSelect" or "ColumnHeaderSelect" the user can no longer move the column.In the code below, I can select all the cells in the DataGridView just fine, but I can't select all cells in a particular Column or Row. [code]...
View 5 RepliesI searched for this topic and all the examples are in C# (and they have errors as they will not convert with a C# to VB converter). I am using VB.net 2005 and would like a sample that work for it. I have a loop that goes thru the DataGridView and changes the row color based on a column/cell value from the binded DataTable (shown below). I'd like to add to the loop (where the comment is) and also hide the button for this cell and let the "In Process" show in the cell instead.
Private Sub ColorInProcessItems()
' Color the rows green if they are In Process, red if they are Complete
For Each row As DataGridViewRow In dgvQueue.Rows
[code]....
I have data like this in my text file
(23.0001.0)
(23.0002.0)
(23.0078.0)
[code]......
I have a sql SELECT statement in vb.net. I have this line of code to calculate a specific percentage of the Net Total:ROUND(Invoices.NetT*'" + txtOnGoing.Text + "'/100,2) As Commission 'txtOnGoing is a text box which pre populates a certain number e.g '10'... this means 10% of the NetT column..The above code works fine, now I want to add the "Commission" Column and display the Total in a text box. Does anyone know how to do this? I know I can use the SUM operator but because the Commission column isnt a column that actually exists in the table I dont know how I could do this.
View 3 Repliesam 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
[Code]...
With an excel file opened, i'm trying to:
Select a Range of Non-Contiguous Cells within a Column, then return the address of the last active cell.
Below, is what I have so far: Note the section maked:
' I can't get the next bit to work: '
To make it work, so far :(
1. Create a new Project using VS-2010.
2. By default, the form should be displayed as "Form1.vb".
3. Add a Label (No need to name or set anything).
4. Add two buttons (Again, No need to name or set anything).
5. Double click on the Form...
6. With the form code displayed, Select all, then paste the following.
'Option Strict Off
'Option Explicit On
Imports System.IO
[Code].....
I'm having some trouble firstly trying to calculate the total of a column in the database connected to my vb.net project. Then I want to divide that total by the number of items in a listbox. This is my code so far:
Private Sub btnavresult_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnavresult.Click
Dim sqlx As OleDbCommand = New OleDbCommand
[Code]......
I get an error saying "No value given for one or more required parameters." when I try to run my program on this line "Dim rdr As OleDbDataReader = sqlx.ExecuteReader()"
I am trying to figure out a calculation I can perform in C# to determine the rows per column. Let's say I know I am going to have 3 columns and my record count is 46. I know that I can mod the results to get a remainder, but I would like something more efficient than what I have tried. So I know I will have 16 rows per column with a remainder of 14 for the last column, but what is the best way to loop through the resutls and keep counts.
View 1 RepliesAfter Filling a DataTable in GridView's DataSource . A column with check box Type appears but it created as read only column and I can't enable it or make it editable... even i tried .readonly = false and still can't be edited
View 1 Repliesi am created a form with DataGridView Binding with ItemStock Table
Table Name is ItemStock
Table fields Names are
Item_Stock
[code]....
I have the following columns : (Using Excel Formula)
A B
------------------------
1 | Date | Value |
------------------------
2 | 8/20/2011 | 92.8 |
3 | 8/21/2011 | 92.4 |
[code]....
I want to calculate the difference between 1st Value (B2) and last Value (last populated row in column B)
Edited :
Using formula : =B2-B6 is not what's required. (I want diff in Cell C2)
I want when the user enters the value in B7 it automatically shows the difference between B2 and B7, when he populates B8 then it shows the diff between B2 and B8 and so on.. I don't want some direct method to do this in Excel and not by iterating all values to check the last value.
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.
do anyone know how to add a new column in gridview using vb.net syntax?the column that i want to add is not bind to any database unlike the other column in the same gridview.
i try to use GridView1.Columns.Add("Percentage")but it turn out to be error.the error said " Value of type 'String' cannot be converted to 'System.Web.UI.WebControls.DataControlField'"
I have a gridview which is created dynamically by adding columns and rows from a database.this is the code which is used to fill the gridview
sqlQuery = "select distinct ID,FullName,Address,[Home Tel],[mobile tel],[work tel],Email,[Birth date],Rate,Notice,Created,Modified,[last cv],Deleted,[q comments],[last typed],Recruiter from [dbo].[vItrisRepository] where email like '%" & email.Text & "%'"
adapter1 =[code]....
now i wanted to add extra column in to the gridview with a name skills in the existing gridview .is this possible?
