.net - Using Values From Two Different DataRow.Columns For One DataGridView Column

Jan 21, 2011

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:

[Code]...

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Calculate A Column Values Based On Other Column Values In Datagridview?

Jun 3, 2011

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

[Code]...

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.net - DataGridView Resizeable Columns But Last Column Can't Be Resized Bigger?

May 10, 2011

For c = 0 To grd.Columns.Count - 1
grd.Columns(c).Resizable = DataGridViewTriState.True
Next c

That allows all the columns in my DataGridView to be resizable EXCEPT the last column. Why?I DO get the little resizable-mouse-pointer... but you can only make the column SMALLER, never WIDER.(Same problem if I try to set all the columns to Resizable, using the VB.net IDE)Shouldn't I be able to resize ANY column I want, bigger or smaller?

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Create DataGridView Columns From Table Values?

Apr 22, 2010

I am using data grid view in Windows Form standalone application to display items as excel spread sheet in VB.NET. I got a table named CostTypes with column names [CostTypeID, CostType] and values [1,External] and [2,Internal] (These are constant but more values can be added to table).

I want to create columns with names of the values[External , Internal] in DataGridView. If I use databiding directly I get columns [CostTypeID,CostType] which is not what I am looking for.

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Expose DataGridView.Columns And Have The Column Editor Work Properly?

Sep 6, 2005

I have a user control with an embeded DataGridView. I exposed the Columns property so that the columns collection could be edited in the visual designer:

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Linking Data From Two Columns And Convert New Column To DateTime Within A Datagridview?

Feb 3, 2011

I am trying to link two columns with dates and time to a new column, but the original columns are not in DateTime format. Here is sample of the data:

C_DATE C_TIME
231110
211152

[Code].....

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DataGridView Cell Formatting - Red Columns Based On Values

Jan 12, 2009

I want to make a certain column of my datagridview red based on values from 2 other columns. I have a "HI" column, a "LOW" column and a "Result" Column which are all strings. Now I want to make the result column red if it's values is less than the "LOW" columns value or if it's value is greater than the "HI" columns value. I tried the following code but something is wrong because cells that shouldn't be red are red:

Private Sub dgvTests_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles dgvTests.CellFormatting
If dgvTests.Columns(e.ColumnIndex).Name.Equals("Result") Then
Dim RowValue As DataRow = TestTable.Rows(dgvTests.CurrentRow.Index)
[Code] .....

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Assigning Datarow's Columns Into Textbox In Vb?

Mar 24, 2009

i have to do the same work in vb as i have done in c#:

[URL]

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Get Number Of Columns In A DataRow Type?

Jul 7, 2009

How can i get the number of columns in A DataRow type?

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Columns Count For System.Data.DataRow?

Jan 20, 2011

im wondering which way may be better to find out the number of cols for a row:

1) row.Table.Columns then count

2) row.ItemArray then count

3) am i missing something, is there a much more "direct" way to do it?

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Add Values In A Column Of A Datagridview?

Jun 2, 2011

i want to dynamically add the values in the column of a datagridview the row of which is also being created dynamically...

Form1.TextBox10.Text = total
con.Open()
cmd = New SqlClient.SqlCommand("select product,Quantity,MRP,Sale_Rate,Disc_Amt,Amt from sale_table ", con)

[Code].....

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Linq To Datarow, Select Multiple Columns As Distinct?

Apr 16, 2010

basically i'm trying to reproduce the following mssql query as LINQ

SELECT DISTINCT [TABLENAME], [COLUMNNAME] FROM [DATATABLE]

the closest i've got is

Dim query = (From row As DataRow In ds.Tables("DATATABLE").Rows _
Select row("COLUMNNAME") ,row("TABLENAME").Distinct

when i do the above i get the error

Range variable name can be inferred only from a simple or qualified name with no arguments.

i was sort of expecting it to return a collection that i could then iterate through and perform actions for each entry. maybe a datarow collection?

As a complete LINQ newb, i'm not sure what i'm missing.
i've tried variations on

Select new with { row("COLUMNNAME") ,row("TABLENAME")}

and get:

Anonymous type member name can be inferred only from a simple or qualified name with no arguments.

to get around this i've tried

Dim query = From r In ds.Tables("DATATABLE").AsEnumerable _
Select New String(1) {r("TABLENAME"), r("COLUMNNAME")} Distinct

however it doesn't seem to be doing the distinct thing properly.

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Conditioning The Values In The Column Of Datagridview?

Mar 15, 2012

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!!

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Get Distinct Values In A Column Of Datagridview?

Mar 9, 2011

Like "SELECT DISTINCT(Col)" in sql query, how do we perform this in datagridview?[code]...

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Add The Values In Column For Datagridview And Display It In A Textbox?

Apr 16, 2010

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]......

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DataGridView Column Formatting - Date Values

May 8, 2009

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.

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Pass Different Values From A Listbox To A Certain DatagridView Column?

Aug 27, 2009

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..

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Unbound Datagridview Column Not Retaining Values?

Jan 10, 2011

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.

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Adding The Values In A Column Of Datagridview On Button Click?

Jun 22, 2011

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

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DataGridView's Column Values Disappear After The Form Is Shown?

Aug 16, 2011

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.

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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

[code].....

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Forms :: Calculate Values In Column And Display In DataGridView?

Aug 29, 2011

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.

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Setting Values To Predefined ComboBox Column In DataGridView

Jan 27, 2010

How to set values to a predefined combobox column in datagridview i.e., I want to set some values to this column other than binding

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Insert And Retreive Values From Database In Datagridview Combobox Column

Jun 18, 2009

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.

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VS 2010 Add Values Of Raw Data In Column 2 And 3 And Input Answer In Column5 In Datagridview?

Jun 28, 2011

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

[Code]....

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Adding Values Of A Column In A Data-bound Datagridview And Placing Results In A Textbox?

Jul 28, 2011

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?

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Check If A Column With A Given Name Exists In A Datarow?

Dec 31, 2009

I want to insert a value from loop in datarow so before entering value in datarow, i want to check that a perticular column NAME exist in table or not...please tell me how can i check it. (vb.net preferred).

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Determine If Datarow Column Exists?

Nov 14, 2008

I have a function in VS2008 VB.NET that creates a dataset and reads field values from that were loaded from a SQL Server 2008 database tables. The tables are from varied sources and in some cases particular column/field names are different. Some use a long name; others use a short name. I need to determine whether a short name or a long name is being used.Pseudo code:If row("ShortName") Exists then ReadDataFrom r("ShortName").ToStringElse ReadDataFrom r("LongName").ToStringEnd If

How would I determine if a particular column name exist in a dataset or datarow?

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Update ADO.Net DataRow Column To Null?

Dec 7, 2009

Using VS2005, VB.Net, Dot Net 2.0, SQL Server 2000. If have some Columns (varchar and numbers) in a DataRow that I want to set to DBNull in the database. The fields as defined as Nullable in SQL DB table.

I have some fields that are populated when loaded but I want to update to be null using the ADO.Net data objects. If I try and use Row("FieldName") = DBNull.Value a 0 gets written to number fields (not sure what gets written to varchar fields.) What code should be used to update fields to Null using ADO.Net dataobjects?

[Code]...

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Update Datarow Column With Data?

Dec 18, 2010

I've been looking around online, and havent quite found what im looking for.I have an unbound DataGridView on my form that has 1 columns ID and NAME, i did a loop to fill in all the ID columns. Then when i loop trough all the ID's, i want to update the NAME column with some data.

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