Create A Datatable Dynamicly And Use A Datagridview?
Jan 9, 2010
I want to make 2 planning forms, one for persons and one for materials. The most ideal situation is when it can be in 1 form and switched by using an option field at the top.
- The information is coming from a SQL 2008 database.
- Vertical the persons or materials must be shown(dependent of the option field).
- Horizontal every day of the year must be shown, so the number of columns will be 365.
- At the crossing the number of hours must be shown.
- The form must be build as fast as possible.
I tried to create a datatable dynamicly and use a Datagridview. The advantage is the information, which must be shown, can easily be changed. The disadvantage is it is slow.What is the best method to do this in VB2008?
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Jul 13, 2009
I am trying to create a datatable to be shown in a datagridview.. i have created a DataGridViewComboBoxColumn that has a data source and now i wanted to create a DataGridViewTextBoxColumn but i dont know how to make it take its data from a column in a table.. i did it with the comboboxcolumn but i coudnt do it with the textboxcolumn..
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Feb 20, 2010
I want to create a datatable using he contents of a DataGridView.
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May 20, 2011
I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)
now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings
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Jul 21, 2009
I have a text file filled with the locations of pictures and I have this code to dynamicly create picture boxes on my form, the code works because it does create one picture box but no more than that, my question is what do I have to do to this code to get all the picture boxes created?
CODE:
Also How would I dynamicly add a Handler for every Picture box created?
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Dec 23, 2009
[Code]...
I need the picture to have a tag value so i can use them later.
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Mar 6, 2011
I have the followig problem; i want to make a class with a private field as a 2-dimensional array, where it's dimension is set in the constructor of the class.Contained data does not matter at this moment.I've looked a bit around but couldn't find a direct solution to my problem, is this possible in VB.NET? [code]
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Apr 9, 2012
I'm trying to create an option to select a specific entry in a SQL table if multiples exists. The Sub listed below is for a textbox (MOTxt) and a button (GotMO) for checking an MO# to pull from SQL. Based on the number entered, will populate other text boxes on the page with that row's data. There are exceptions to this, where the MONumber will be entered more than once with different data associated with each entry. So, here's my situation. If we have a duplicate MONumber listed in the table, it will populate the textboxes with the first entry it finds for an update.I would like to create a dynamic dropdownlist (that displays only if multiples are found) displaying the 'Name' field entries for each MONumber found, then once the correct name is selected from that list, to then populate the textboxes with that selected datarow.Here's my code behind:
Protected Sub GotMONum_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles GotMO.Click
Dim da As New SqlDataAdapter
[code].....
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Jan 20, 2011
At the moment I have a DataGridView (bindet to a DataTable) and some labels. If DataGridView's event SelectionChanged occurs,the labels should be filled with the information of the selected row -> No problems.But if I sort the DataGridView and click on a row, the informations in the labels are wrong.
Event:
Private Sub DGVMain_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DGVMain.SelectionChanged
If DGVMain.SelectedRows.Count > 0 AndAlso Not Me.DGVMain Is Nothing Then[code].....
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Dec 8, 2010
My application must display some data in Datagridview (status of COM ports communication) and i Used .mdb databases before for faster search and Datagridview update. How i understand Datagridview is importing data from DataTable and data in DataTable is imported from .mdb file, so i decided to make shortcut - stop to using .mdb file (data must be erased every time application start and it is useless make .mdb file and erase it every time, becouse it is increasing even when drop is used) and using only DataTable..
I want to row in Datagridview change it color to red when it's Collumn(6).text countains %error% string..
When Error in COM port is starting, i can fast find row in DataTable for that port and write information that Error accured for that port and DataGridview automatically updates:
Dim RRow as () DataRow
RRow = ds.Select("Port = 'COM3')
RRow(0).Item(6) = "Error Opening COM3"
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Jul 11, 2011
I am trying to create a datatable in VB.NET, but when I output a row from this table it shows: "System.Data.DataRow".I have compared my code to several websites and it seems correct. However if I instead Response.Write these values they display correctly.
[Code]...
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Jun 21, 2010
I just want to know on how will I add a Checkbox in each row of my datagridview. First I used a datatable to get all the values from my database and then pass it all to the datagridview. What I want to happen is at the first column of my datagridview there is the checkbox.[code]
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Feb 3, 2012
i build a datatable in DataGridView. When form open datagridview point to current row is first row
when i call this code :
MsgBox(dgvName.CurrentRow.Cells("drID").Value)
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Jun 22, 2009
I have a datatable dimensioned as new.I add the columns that I need (during the form's load) I have a datagridview as on object on my form and set the datatable as its source.The table is loaded with values and they display properly.The User closes the form and returns to the 'Main' form. At this point no problems, everything is working great. NOW...The user re-opens the form containing the datagridview It has the values from the previous time it was open, plus the new values ! I have tried several things so when the user goes back into the form it only has the new values, but it always keeps the previous values and appends the new values to it. I have attempted to clear it by adding a line: datatable.rows.clear(); I have activily gone through the datagridview one row at a time and use a statement to clear the cells;
For Each DGVRow As DataGridViewRow In Me.DataGridViewErrorList.Rows
DGVRow.Cells.Clear()
Next
so far no luck.
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Jun 21, 2010
I'm selecting value from my database, passing it to datatable then giving DataGridView.DataSource value of datatable.The thing is that in those rows i'm also selecting some dates and problem is that my default date in database is '1900-01-01 00:00:00' because i use "smalldatetime". And what i want is this...when I find default value in database i want to show it like an empty string, like i said...because date is in smalldatetime format i can't do this in SQL query so i wonder how can I change this in DataTable or even better in DataGridView...of course, in code?
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May 21, 2012
I managed to Convert a Datagridview to Datatable, Now problem is the programmatically addded Columns Seem to end up at the end of the of the initial table layout[code]...
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Jun 30, 2010
I am trying tomodify the following code from a datagrid to a datagridview but I'm not sure about how to do the conversion. The problem lies with theDataGrid.TableStyles.A dgv does not have that property.
Function
GetColumnHeadingText(ByVal
Column As
[code].....
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Sep 28, 2011
I developed a windows forms app, using VisualBasic in VS 2010. In my form, first I declared a variable as DataTable (Dim VarTable as New DataTable).
Second, changed the DataSource property of my DataGridView (DataGridView1.Datasource=VarTable)
Third, I filled the VarTable in this way: using a resulset from SqlDataReader, i added row by row.
Dim Result As SqlDataReader=CommandSQL.ExecuteReader
Do While Result.Read()
Dim RowToAdd As DataRow
RowToAdd=VarTable.NewRow()
RowToAdd("Code")=Result("Code")
RowToAdd("Name")=Result("Name")
VarTable.Rows.Add(RowToAdd)
Loop
Fourth, after the user changed data in datagridview, I saved the data back to SQL, cleared VarTable (VarTable.Rows.Clear()), and back to top of form to accept a new code. But here, problems begin. When I execute again the whole code described, the datagridview dont show the entire rows, and sometimes crashed with different errors. Solution? Dont fill VarTable row by row. Use VarTable.Load(Result) to populate the VarTable. I don't know why now works, But just I wanted to share this information.
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May 21, 2010
How to copy all datagridview data into a datatable ?
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Mar 29, 2011
I have a BackGroundWorker that produces a DataTable which is then bound to a DataGridView.
I want to have selected rows of the DGV colored based on the value of a column within the DataGrid (1 if coloured)
How can I set the row color while populating the datatable? Or do I have to set the color on the DataGridView after binding it to the datagrid?
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Oct 27, 2009
me how to bind the dataTable to dataGridView??
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Nov 12, 2009
If I have a datagridview's datasource set as some datatable, is there a quick and easy way to reflect the changes in the datatable that have been made in the datagridview?
When I sort my datagridview, the rows in the datagridview and the datatable no longer match up.I know I can catch when the dgv is sorted and for-loop through the dgv and send it to the datatable, but I was hoping there was a save/update method or some such thing.
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Apr 4, 2012
I am using the DataGridView for editing data, but when I go to access the DataTable bindings there are no data. I used to bind the following
'Data Loading
dtDettaglio = lettura_art
bsDettaglio = New BindingSource(dtDettaglio, Nothing)
dgDettagli.DataSource = bsDettaglio
dgDettagli.AutoGenerateColumns = False
[Code]...
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May 5, 2012
I have a datatable with three columns
Id name value value1
I want to create a string from this datatable so that each row in datatable will create two rows name will become one row value 1 will become another row
If name and value1 are similar then include value 1 only otherwise include both name and value1 (this is done)
If name of one row is similar to name in any other row, then add following text infront of both duplicate rows in string
Id is similar to Id
This is what I have written so far:
Public Function GetGazetteer(dataTable As DataTable) As String
Dim processedData = New List(Of String)
Dim rowData = String.Empty[code]....
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Jul 16, 2010
So I'm sure this sample code exists somewhere, but at this point I just need some guidance. What I am trying to do is import all of the data from a CSV I have (it's about 100 columns of data that are numbers, not strings, and have headers) and create a DataTable so that I can plot to a 3rd party chart control called Zedgraph. The problem is that when I plot columns from the DataTable that is created by the following code, it simply plots a diagonal line of the points count (in other words, if I create a curve from a column containing 400 data points, it plots a line from 0,0 to 400,400, instead of plotting the actual data). What I think I have finally figured out is that I'm importing the data as String, rather than Double or whatever other number type I could use. The problem is that I cannot seem to get any OLEDB connection to actually fill my dataset, so I have had to stick with this code for now. FYI, I am using Visual Basic Express 2010 and the file is a CSV created from Excel 2007. [code]...
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Jan 27, 2011
Is there a way to add columns in a datatable to the intellisense of the datatable? Is there a way to display the columns of a datatable in a datagridview?
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Nov 12, 2010
i am created Window based application .
i want to bind datagridview source to datatable .
whenever i write
Dim dt As datatable
dt = dgvtest.datasource
Error occur ?
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May 7, 2006
I have a datatable with 10 records linked to a datagridview. When I initially load the datagridview, row 0 in the datagridview = row 0 in the datatable - based purely on the order they load, and the datatable's default sort order. I then filter my datagridview and am left with 5 records. Is there a way of determining programatically, the actual datatable row number of a row displayed in a datagridview, considering that row 0 in the datagridview is now not necessarily row 0 in the datatable?
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Dec 2, 2010
How can I fill Datatable with DataGridView data (VB/C# .NET)?
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Oct 13, 2011
I'm facing a problem with a datagridview datasorce, or refreshing it. I'll try to explain what is happening. So I have a datagridview called dgvMaterials, I'm binding datasorce to the datagridview from one table in mySQL server. Here is the code:
Dim ds As New DataSet
Private Sub frmSettings_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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