If I have a DataTable and want to create a new row I first call DataTable.NewRow() which returns a DataRow. This row then has the schema of the Table, and I can set the value of each field in the row. At this point does the Table "know" about the Row, or does that only happen after I call DataTable.Rows.Add(DataRow row)?
If I call DataTable.Rows.Add() more then once are duplicate rows created in the data table with duplicate values?
The reason I ask is I'm trying to write a recursive function that will iterate down a tree structure and populate a DataTable with values. So I have situations where rows being created for each child will have columns that have all the same values because they come from the parent.
So my idea was to pass a DataRow with the parent's information to each child. The child would add its information and then add the row to the table. But I'm trying to figure out if I need to call DataTable.NewRow() for each child, or if new rows will be created automatically if I add the same row multiple times.
No, but it's easy to copy a row so you can get what you want (assumes the existing row is in a variable called existingRow):
var newRow = dataTable.NewRow();
newRow.ItemArray = existingRow.ItemArray;
dataTable.Rows.Add(newRow);
Yes, old question. But Michael's answer does work. I needed to add multiple duplicate rows to a DataTable for a scheduling app. With dt.Rows.Add(_Users) I got the error:
This row already belongs to this table
But using this, I could loop through and hold as many positions open for a job as needed Where "Length" is the number of positions to hold open for a job:
int Length = int.Parse(TextBox6.Text.Trim());
for (int i = 0; i < Length; i++)
{
Users.Rows.Add("9999", "Open");
}
Searching Google for this sucks, because most people want to remove duplicate rows in a DataTable, and not add duplicate rows in a DataTable.
No, it will generate an exception of type System.ArgumentException.
i recommend that you put the data in a array and then add the data to data table
e.g.
yourDataTable.Rows.Add(data[0]........);
newdatarow will generate exception error
Related
I am using a DataGridPro component with different columns.
One one the columns is defined like this:
This issue is that I am trying to understand why the row is not available in the valueOptions prop of the column definition.
I would like to be able to populate the choices based on a list that is available on the row in another field.
But I get this error when I try to read the row:
Can you please help? The grid is populated with lots of rows coming from an api fetch.
Every other column is working fine accept this one.
Thank you.
I discovered that it was my bad. My column object was used twice with different parameters and so, yes, the row was not available for the second case.
Is there any way to get all of the children of a parent row? The only method that I see, is to grab all of the rows and look at the parentId's assigned to the children.
(For what it is worth, I am using the javascript api)
I don't believe it's currently possible to explicitly request all child rows of a specified row, using the SmartSheet API.
As you've described in your post, you'd need to use the Get Sheet operation to get the list of all rows in the sheet, then look for row objects in that result set where parentId matches the id of the parent row you're interested in.
If I remove one Column using a sap.m.Table from a standard view the corresponding items are still available. The problem here is that the ordering is wrong after I delete a column here.
Lets say I want to delete the "Historie"-Column, the corresponding items are still available. How can I delete one column with the items of one column here?
The problem here looks like that:
As you can see in the picture below I have deleted some columns and also the "Historie"-Column. The corresponding items are still available.
How to solve this and delete the matching items here using sap.m.Table?
I tried to remove the Columns by removeColumn(oCol) from the API: sap.m.Table
I think this is a bug with sap.m.Table.
For your problem, you can use the visible property of column to hide the column from view. Though it will not remove the column from the table.
var oTable = this.byId('idTable');
var oDeleteColumn = oTable.getColumns()[0]; //fetch the column you want to hide
oDeleteColumn.setVisible(false);
removeColumn() removes the column only from the table's <column> aggregation, but not from the data.
If it is an option for you, than use Table Personalization:
Table personalization can be used to modify the display and settings
of a table.
It is a UI pattern that is used to change one or more of the following
attributes:
Visibility of columns
Order of columns
Sorting
Grouping
Filtering
Sample
I have a table named patients in matlab that I created from reading an excel file using the readtable command. Now I would like to add a new row to this table programmatically. I have attempted the following:
patients.LastName{end+1} = 'Stewart';
While this does add a value at the correct spot in the table, it gives a generic name to my row. My RowNames property in this instance is important.
How do I add a new row to my table in Matlab and give it a name, then populate it's contents?
This is because all other entries except Last Name are empty. But no worries. In order to assign specific Rownames, please use the following statement. Lets suppose you want to assign last names as row names of the table.
patients.Properties.RowNames = patients.LastName;
Is there any simple way to get the object, used to render given row in CellTable, by index of the row?
I am using AsyncDataProvider, and don't want to remember lists of data objects, returned from the server. Also I am using MultiSelectionModel, so several items could be selected there and I need to track out which one was clicked last.
I know the index of last clicked row, so I need to get the object, corresponding to the row, somehow.
getVisibleItem? possibly combined with getPageStart if you're using paging and you only know the absolute index.
For your use-case, maybe you could use a customized selection model whose setSelected tracks the last change.