Padding A Column When Using DataView.RowFilter
Aug 5, 2011
Does anyone know if it's possible to pad a column to the left using the RowFilter property in a DataView? My data comes from a third party via XML which I've converted to a DataSet. I'm inferring the XML schema to set the column datatype. I've converted the column in question to string in order to properly compare any text entered by the user. At the time I populate the data grid I format the column by padding it with zeros on the left side so that it is always 11 characters (Ex: 123456789 becomes 00123456789). This is for legal reasons and not optional. However when using the RowFilter property the zeros in front are obviously not accounted for because they don't exist in the DataSet.
This is what I'm doing currently:
[Code]...
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Feb 17, 2011
How Can I Row Filter with a condtion on colam where Coloum1 = > 0
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May 24, 2011
It works with 1 parameter (i_index) but if I also use i_datum, I get an error like: "Conversion from string "park_id = 100" to type 'Long' is not valid." Public Function detail_kalender(ByVal i_index As Int16, ByVal i_datum As Date) As DataRowView
Dim dv As DataView
Dim anyrow As DataRowView
dv = New DataView
With dv
.Table = myds.Tables("kalender")
[Code]...
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May 29, 2003
Is it possible to select distinct in the rowfilter method?
I have something like:
VB
'Create a data view so we can get each items name
Dim dvwItemNames As New DataView(dtlItems)
dvwItemNames.RowFilter() = "SELECT DISTINCT Name"
This gives me a syntax error exception. I tried just "Distinct Name" but this had the same result. "Name" is the column name. I would rather do it this way then looping through the entire table and putting the name in an array list or something.
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Mar 25, 2009
I have a dataset that holds a few tables; Songs, Artists and SongArtists (relations between songs and artists). I want to bind a grid to a view of the songs so they are filtered by artist. A combo will provides the artistID. Is there a way to use a dataview.RowFilter to filter based on a table that the dataview is not "viewing"? Or is there a better way to do this type of thing?
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Aug 12, 2011
I am trying to use dataview.Rowfilter to filter datagridview for users. The basic idea is that user enters a text in a textbox, and then the below function is called to filter the text in all columns, like Col1=value OR col2=value OR col3=value. But I got error message of the filter expression.
[Code]...
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Nov 20, 2010
If want to do a DataView.Find on a DataTable that is already 'ORDERED' by the Column I am seaching, so a DataView.SORT should not be necessary, but it throws an Exception if I don't give a .sort command before the .find command. Is there any way to avoid this apparant duplication ? and speed up the search time. Its a very large table - 1 million rows. I am using VB 2010
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Mar 15, 2010
I have a datatable and I apply a filter to the defaultview.rowfilter property of that datatable. If I then loop through the rows collection of the datatable, will I only be able to see those rows that the filter applies to, or will it loop through all the rows?
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Dec 31, 2011
How Can I do multiple column RowFilter like below.[code]...
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Mar 2, 2012
I want create a datatable .In this datatable 2 coloums are percentage and marks .I want to show the maximum percentage record display on first and simultaneosly another racord ?Thats why i take a dataview but dataview could not sort the datatable exam.
Dim view As DataView = dt.DefaultView
view.Sort = "clm_percentage DESC"
dgvStudInfo.DataSource = view
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Jun 13, 2007
I have filled a datagridview with a dataset using the following code.
Code Snippet
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Dec 16, 2009
Is there a way to get a subset of Unique values in column(1) of a DataView?
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May 10, 2011
I have a dataview object that is being populated by database fields - so I can sort on these partulular columns by specifying the actual column names without any difficulty. However, I have been asked to add a few more columns to the dataview, and these columns will be calculated columns, not directly derived from an underlying database column.The users want to be able to sort on these new columns as well - even though there is no actual column name I can use to sort.
I have not been able to see where I can sort a dataview based on the actual column integer value used when the user clicks the appropriate heading to sort.
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Jan 5, 2012
I got a problem with dataview that get data from datatabel (Col1 : ID,Col2: Time) and I'm sorting by Time in desc ... when the values for example {40.21,80.21,70.25,25.2} the dataview sorting them as I need but when one of values goes above 100 for example {40.21,80.21,100.25,25.2} the dataview always sort the highest number is the buttom, I don't know why ..
This is a sample code
Dim dt As New DataTable
dt.Columns.Add("ID")
dt.Columns.Add("Time")
[CODE]...
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Jun 21, 2010
Friends I m working with RowFilter, its working good with String Data, and like statements, specially its Autometed functuallity with string data is good, just like in follwing code (it is written in Textbox "txtSearch"s TextChanged Event)
[Code]...
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May 15, 2010
I'm trying to filter a dataview for e.g dates with a year larger then 2005, or e.g items with a month+year larger then Oct 2005. The compared to value comes from a datatimepicker which depending upon users input has a custom format of either full date, month+year or year as its textproperty.
I know that rowfilter is very limited in its options, and that's where my problem lies.
The dates in my dataview are real dates, M/dd/yyyy, so no conversion needed. The date columns type is also DateTime as such. The problem though is that I'm not able to separate the year, or month+year from the date columns value to compare against the datetimpickers value.
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Sep 7, 2009
I can filter when I'm only checking with one textbox, but when i try to use multiple text box filters its does not work the way I want it to. I understand what is going on here but i don't know what to do to fix it. Basically I have my main form with the datagridview, there is a button on this form called filter. When the user will hit this button a small form will pop up with 5 text boxes, I want to give the user the ability to enter into any text box they wish and the datagrid view will update accordingly.The problem is when they enter into one text box it works fine, but when the try entering into a second test box the filter is only filtering from the original datatable and now the dataview.
Code:
Public Class Form2
Dim dvFilter As DataView
[code]....
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Feb 3, 2010
why the rowfilter property does not work if there is an apostrophe in present in the string. For e.g. , tempdat.DefaultView.RowFilter = "Mystring = '" & st & "'" the above does not work if st="mystrings's" under the column header Mystring.
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Apr 26, 2010
my program written by me can only perform properly if its in multiple of 8bits, but when it exceeds more than or less than 8 bits it doesnt perform the specified function. so i want to know how to do '0' padding if my file size is not in multiples of 8 bits.
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Apr 17, 2009
If a user enters less than the maximum limit of characters set for a textbox, how do u pad the textbox with xxxx when the user leaves the textbox. I've tried using the padright function but I can't seem to get it to work.
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Nov 5, 2010
I have some questions regarding vb.net bit shifting. I understand the << >> operators are bit shift operators in vb.net. I have a two byte hex value 0x3ACC, each bit in this two byte represents either a day, month or year. The bit structure of this hex value is yyyy yyym mmmd dddd. I am confused as to how I should bit shift these values so that year, month and day are in their own UINT16 values. Just want to know about shifting numbers and if I need to add any padding to the shift?
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Feb 25, 2009
I have a ListBox that I add items to using the standard:
ListBox1.Items.Add(whatever)
I would like to increase the space between entries, but not adding a blank line, since I do not want a blank option tha thwe user could click on. Is there anyway to do this?
I have tried:
ListBox1.Items.Add(whatever & vbCrLf), but no change.
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May 21, 2009
How do I set a Labels Padding Property dynamicaly?
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May 21, 2009
How can I set properties like the Padding and Location in code?
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Sep 7, 2010
1. How to get 0 padding/inner margin in the cells? I want just the border as a colored line at the next close pixel to the control in the cell. Or if border set to none, I want the controls with no gap.
2. How do I actually add/remove rows& columns? I thought this was by setting the .ColumnCount property, but if I set it to 3, and then try to access the third column, it gives exception, so it's obviously just two columns, although it also looks like 3 on the form. ? I created it in designer with 2 columns though. But I don't understand how this hangs together..
Dim z0, z1, z2 As New ZedGraphControl
z0.Dock = DockStyle.Fill
z1.Dock = DockStyle.Fill
[code]....
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Jul 15, 2011
I was using System.Windows.Forms.TabControl to list custom pages, but there seems be a Hardcoded Padding of 3 pixels on all sides of Tabcontrol. How I can remove that. One point here is I dont want to remove Tabs on Top http:[url].....I found above MSDN link whick does removes margins from all sides including TabItems on top which I dont want.
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Apr 23, 2010
I have been writing a security class in my application, I am able to encrypt the string correctly and without error. However every time when I try to decrypt this string again, i get an error with this as it returns the following Padding is invalid and cannot be removed.
Here is the code:
Public Function DecryptKey(ByVal plainText As SecureString, ByVal key() As Byte, ByVal iv() As Byte) As SecureString
Try
[CODE]...
And it provides a stack trace with:
at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, Int32 outputOffset, PaddingMode paddingMode, Boolean fLast)
[CODE]...
I have found simular issues on web, and most of them say that the IV is not the same the encrypted version, but I can confirm that the IV is the same as they both access the exact same variable.
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Jul 13, 2011
decryption error : Padding is invalid and cannot be removed.
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Oct 18, 2010
I use the following code to initialize encryption...
[Code]...
So I don't think there is a method for PKCS5. Is there any way to add it, or do I need to write an encryption method myself? If so - how do I write that? Is there a reliable DLL that will support it?
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May 3, 2012
While I am asking this for VB I verified this issue also occurs in C# so I think it is a .NET issue. I am using Visual Studio 2010 Premium Version 10.0.40219.1 SP1Rel with .NET Version 4.0.30319 SP1Rel.
Step to recreate the problem.
Create a new Windows Application for Visual Basic (WinForms).
Add a ToolStrip.
Add a ToolStripComboBox to the ToolStrip.
Save, note the width of the combo box.
Change the padding on the combo pax to 2.
Save and close the form designer.
Reopen the form designer, look at combo box width - it decreased. Note that form is marked as having been modified. So save it and close the designer again. Reopen the designer and look at the combo box width - it will have shrunk every time you save, close, and reopen until you get to a 0 width. It shrinks by 4 * the padding size. Why would padding affect the size since that is the interior margin where as the margin settings are the exterior margins.
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