trying to understand DataGridView. I can sum columns with no problems and place the result in a textbox. My problem is multipling two column rows and saving it. I receive the following error when I go to save it. "Column mapping from source column failed because the data column is a computed column. So can I compute two column row to a third and save it, if so how. My code is below:
I save.[code....]
In my vb 2005, form one combobox and a datagrid view datagridview filled via dataset and sqldataadapter - declared class objects when an item in the combobox selected, some subitems corresponding to the combobox selecteditem is displayed in the gridview.ie., when a new item selected clear the grid and fill the grid from the new record set.[code]
View 1 RepliesI have three sub tables that I want to process. For each I want to combine the rows, as they are only different by contents in the second column(I want to do the same to the fourth column, later):
'Sub table 1
xx|C201 |02300877 |Samsung |....
xx|C201 |02300877 |Toshiba |....
xx|C213 |02300877 |Samsung
[code]....
p.s. For the fourth column, Manufacturer information , I want to do the same and I'd probably get something like this for the final table:
xx| C201,C213,C606,C619 |02300877 | Samsung
xx| C201,C213,C606,C619 |02300877 | Toshiba
xx| C303, C305,C712 |02301163
xx| C207, C209, C708 |02301165
i have a datagridview with three columns. i set the first column to visible=false, so the user can only see two columns.when the user presses the tab key in the first visible column -- column(1), i want to ignore column(2) so that the user only tabs through the rows in column(1)i can't get it to work. it will always tabs through the rows in column(2) even if i use the column name.
[code]...
I have a datagridview, and I want to get an array of rows, or rows indexes in which boolean column "Aktywny" is set to True.Obviously I can Do it using loop, but LINQ will be much faster for sure...
View 1 RepliesI have a DataSet that contains 1 DataTable, and the DataTable contains only 1 row of data. I want to loop through all columns in that row and say:
Column name = column value
so for example if the column name is FAVORITE_FOOD and the value is pizza, I should display FAVORITE_FOOD = pizza I can get the column name from column.ColumnName and the value from Rows(0).Item(0), but for the life of me I can't put it all together in a simple loop.
I'm saving data to a database, data from a listbox and checkboxes.In the listbox, on the form, there are 20 records and then there are 20 corresponding checkboxes.I need to save all 20 records to the database so really I need 20 new rows. What I have managed to get working so far is that it will save the last record only.Here is the code that works:
Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
'setup the relationship
objDataSet.Relations.Clear()
[code]...
but that's not right.How can I get to save 20 new rows to the database table?
My problem is I click Save and it tells me the update is successful (via my code) but it then deletes the record and shows me the last one again, so it's not really updating.
Code:
Private Sub BindingNavigatorAddNewItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Handles BindingNavigatorAddNewItem6.Click
HistoryBindingSource.AddNew()
[Code] .....
I tried just having it write "test" to a few rows.
I also have this other method (doesn't work either) that maybe a better way to try? I get an error on the dsNewRow= line saying it's not set to an instance of an object.
Code:
Private Sub SaveToolStripButton1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveToolStripButton1.Click
Dim cb As New OleDb.OleDbCommandBuilder(data)
Dim dsNewRow As DataRow
dsNewRow = ds.Tables("History").NewRow()
I have a datagridview control. I want to save the rows and then restore them the next time I run the program.
How do I write the rows out to an XML file?
I know how to fill the rows from an XML file. But when I've done so I can't add any more rows. It gives the following exception when I try: Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound. What can I do about this?
Or is there an easier way to save and restore the rows?
I want to print a DataGirdView,
View 2 RepliesI need to write data that is contained in a datagridview to a text file row by row.I can't get this to work.
Dim row1 As String
Dim cell1 As String
Dim cell2 As String
Dim cell3 As String
[code]....
i want to use datagirdview in tabular form
example:
Left Right
Normal Yes No
BGDR No Yes
I have two datagridview1 and DataGridview2 and have same field like productCode,ProductDescripiton,Price,Qty and ItemTotal. Now I want to transfer data from datagridview1 to datagridview2. I want that when i click Save button the DGV1 field save to DGV2
View 3 Repliesmy query is too long and retrive larg data.
and myform hanged when query is process.
is there any way to set same value for all the rows in a particular column of datatable without using for loop ?
View 4 Repliesis it possible to have a datagridView in which each column can have diff no of rows in it?
View 1 RepliesI has the code :
dgInventory.Columns.Add(col)
But this code will add columns to every rows in the gridview. How can I change the code so that it only add the column to row one instead of every row?
I have a db with Column name Break. I have attached to my datagrid view and all that works and shows up correctly. However Im needing to put this code in a timer to get all the times in the Break Column but I need to get it from each and every row. For example:
Break
6:00am
7:00am
6:30am
I need it to look through each row and get that value. Ive tried various things, but Im not on my normal computer so I cant post my code.
I have two rows as shown below
regn_no date name Adress
5001 15 may 2010 A xyz
5001 13 jan 2011 B ABC
[code].....
if datagridview has no rows and no column msgbox show no rows and column how can i do that?
View 1 RepliesI am trying to add the sum of a datagrid column to a textbox. There was a similir question in this forum but it doesnt add the sum of all the rows of that column to my textbox.
Me.SubtotalTextBox.Text = ABTDBDataSet.Products.Compute("sum(UnitPrice)", String.Empty) What else do I need to add to get the whole rows sum of one column and show up in the textbox.
how can I save the value of my first column of my listview to sql? I'm using OLEDB by the way.
View 1 RepliesI need to find rows in resultsets that have every column without null.these resultsets got variable number of columns.currently, the only way that I can think of is creating a view on each resultset and filter this way:
select field1, field2, field3, field4, ...
from "huge query"
where field1 is not null and
field2 is not null and
[code]....
and then in a storeproc/function or .net code(c# / vb.net) loop through all rows / columns and flag or remove every row that got any null?
Datagrig with diffrent no of Rows in each Column.
View 6 RepliesHere is my DataTable columns :
ID Note Detail
I want to write sth like this :
//below code block is not the right syntaxFor each q in dtDataTable.Column("Detail)
strDetail = Row of Column Detail
Next
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 RepliesI can't seem to figure out how to update a single column for every row in my database...
con.Open()
Dim cmd As OleDbCommand
cmd.Connection = con
[code]....
What I'm looking to do is to update add a value to the given value already in the row. for instance:
id name value
1 peter 8
2 paul 10
3 mary 16.25
I just want to add a specific value to each row, such as "8"
id name value
1 peter 16
2 paul 18
3 mary 24.25
Is it possible to show columns as rows and rows as columns in DGV? If yes, how it can be done?
View 2 RepliesI am trying a small application here. It is a windows mobile application. I have to create a form with one drop down and a datagrid.Once a value is selected in the dropdown. The focus goes to the data grid.I know before hand that there is only one column. But I dont know how many rows the user will enter.When the foucs comes to datagrid then one row is created where the use will enter a number. When he hits tab or enter a new row is created and the cursor goes there and the user can enter second number. When he tabs or etnerts a new row is created. This should go on until he presses Save button when all these values will go in the database table.
View 3 RepliesI am having trouble Counting the number of rows in a specific column in a datatable.
View 2 Replies