C# - Reset The First Match Row's Column Value To Empty String?

Dec 11, 2009

new with Linq and very excited with this feature. However, I want to see if I can do the following with LINQ:


Notice that I have a break in my foreach loop, meaning that I just need to reset the first match row's column value to empty string.


Find A Match For A String In Column 1, Return A Value From Column 2 On The Same Row?

Sep 25, 2009

i'm trying to get  my program to look up a string and find a match in an access database in column "PhoneNumber" and return the value from column "FullName" on the same row to a different string

so it would go like this: (i really don't know much about accessing databases)

Dim PhoneNumber As String
Dim FullName As String
PhoneNumber = TextBox1.Text
FullName =

View 10 Replies View Related

C# - Sorting DataTable String Column But With Null / Empty At The Bottom

Feb 7, 2011

I need to sort a DataTable or DataGridView by a column that is a string value, but with null/empty values at the BOTTOM when sorting ASCENDING. The DataTable is NOT populated by a SQL statement, so no order by. If I do


View 3 Replies View Related

Sorting DataTable String Column, But With Null/empty At The Bottom?

Mar 5, 2009

I need to sort a DataTable or DataGridView by a column that is a string value, but with null/empty values at the BOTTOM when sorting ASCENDING.The DataTable is NOT populated by a SQL statement, so no order by.If I doDataGridView1.Sort(New RowComparer(System.ComponentModel.ListSortDirection.Ascending))then it throws an exception, saying that the DataGridView is DataBound, which is correct, but doesn't help me, and I want to keep it databound.

View 2 Replies View Related

VS 2010 - Settings Occasionally Get Reset To Empty

Sep 13, 2010

While writing an app that uses a couple settings, they occasionally get re-set to empty. I haven't seen any pattern to this, but I do have a vague memory that there are certain circumstances that will reset the settings in a project under development. What are the circumstances that cause the settings to be reset?

View 6 Replies View Related

Nothing Equals String.Empty, Null Does Not Equal String.Empty?

Jun 28, 2010

This must've have been asked before but I couldn't locate it. In a mixed code project (VB and C#) we were debugging some old Visual Basic code where a statement as follows could be found:

If Request.Params("xxx") <> "" Then
'do something

I considered this a bug as Request.Params could be null, in which case the statement would've become false which wasn't the idea. So I thought. I just found out, -- probably for the tenth time and I will keep forgetting -- that the following two statements are not equal, while Nothing in VB should be equal to null in C# (thought I):

if(String.Empty == null) // always false
If String.Empty = Nothing Then ' always true

Should I dismiss this as a typical Microsoft backward compatibility effort, or should I consider this a huge error in the VB.NET compiler? Does anybody know the Microsoftean opinion on this oddity?

View 3 Replies View Related

.net - Column Is Empty Then Error As Conversion From String "" To Type 'Double' Is Not Valid?

Oct 22, 2011

Using VB.Net If the grid cell value is empty, i am getting error as "Conversion from string "" to type 'Double' is not valid"Code (gridview_CellLeave)

Dim z1, z2, z3, z4 As Int32
If grvList.CurrentRow.Cells(1).Value <> "" Then
z1 = grvList.CurrentRow.Cells(1).Value
End If
If grvList.CurrentRow.Cells(2).Value <> "" Then


View 2 Replies View Related

Arrays - If Not String.Empty Ignoring Empty String

Aug 11, 2010

I have a array of strings and I am looping through them, but the string might be empty so I am trying this:


View 3 Replies View Related

Datatable.column Expression To Match Select Sum From Where

Aug 15, 2011

I was wondering how i could pass the following SLQ function to my datatable:

Select sum(Quantity) from Purchases where transaction_mode=1

View 3 Replies View Related

Count Of Column Names And Source Expressions Do Not Match

Feb 25, 2012

The count of column names and source expressions do not match. [ Column name count = 20,Source expression count = 19 ]

View 5 Replies View Related

Resize A Column To Match Width Of Widest Text?

Jul 2, 2010

What code is needed to auto-size columns to match the width of the widest text?[code]...

View 6 Replies View Related

Insert Error: Column Name Or Number Of Supplied Values Does Not Match

May 5, 2011

I have a form in an application that I'm building that shows a datagridview with the last field being a checkbox. What I'm attempting to do is if the user clicks on the checkbox and then clicking on "Save Changes" all of the fields on that datagridview row (except the first field) is then saved to a database. I have the following [Code] The error I keep getting is "Insert Error: Column name or number of supplied values does not match table definition.".

View 5 Replies View Related

Take A String Out Of A Database Field And Match It With Another String?

Oct 8, 2009

The database field has text inside the field and I want to match it with another string...How do I convert a field to a string?

View 7 Replies View Related

VS 2008 : Match Words From One String To Another String?

Jun 9, 2009

Im trying to work out what the best way to match 2 strings together, but with a difference.

String1 = "dog cat bird chair book table"
String2 = "the dog chassed the cat around the chair"

No I know I can break string1 up by space character and check if each word appears in string 2, I would prefer to not have to do that.If there some sought of regex that would take a group of words and retrun how many of them matched ?

View 2 Replies View Related

Insert Error: Column Name Or Number Of Supplied Values Does Not Match Table Definition

May 5, 2011

I have a form in an application that I'm building that shows a datagridview with the last field being a checkbox. What I'm attempting to do is if the user clicks on the checkbox and then clicking on "Save Changes" all of the fields on that datagridview row (except the first field) is then saved to a database. I have the following

Private Sub holidaysaveButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles holidaysaveButton.Click
For Each dr As DataGridViewRow In DataGridView1.Rows


View 14 Replies View Related

Check Column Empty In .net Using MSaccess?

Aug 25, 2009

i want to check the table column null or empty......in vb.net iam using ms access in backend.....

View 2 Replies View Related

VS 2008 - Show Only Row With Empty Column

May 17, 2009

is there a way to show in datagrid only those row that has column that is empty, im using this code
Me.DataGridView1.DataSource = ds.Tables("0").Copy() but it shows all the data from my table.

View 6 Replies View Related

VS 2008 : Check Column 0 Is Empty Or Has Some Value?

Jan 25, 2010

What is the best datagridview event to use these codes I want to check column 0 is empty or has some value

If e.ColumnIndex = 0 Then
If DataGridView1.CurrentCell.Value = "" Then
MsgBox("Empty Value")


View 3 Replies View Related

Way To Check Which Row Of The Value(any Of The Column) Is Empty And Get The Row Number?

Oct 3, 2010

Hi, Is there any way to check which row of the value(any of the Column) is empty and get the row number??

View 4 Replies View Related

Office Automation :: Paste Into Next Empty Column?

Oct 5, 2009

I am trying to get this to iterate and append the items in my listbox, which are single column excel files into a single sheet. However, for some reason its placing my second data set out in the bottom of the sheet. I feel like I'm probably missing something very basic here and I've been looking at for to long this afternoon. I used to create this worked splendidly in some other applications I've been developing.

vb version is 2008 VB express excel version is 10.0

For Each filename In ListBox3.Items
If System.IO.File.Exists(filename) = True Then
xlBook = CType(xlApp.Workbooks.Open(filename), Excel.Workbook)


View 4 Replies View Related

VS 2005 - Remove Empty Column From Table

Oct 3, 2011

I am using TextFieldParser to Read a Tab Delimited Text DataFile. The problem I have is that some times the data file (3rd party provided) contains an extra Tab which therefore creates an extra column. I need to remove this unnecessary column. Some columns will have rows that are empty so I cant just delete the column if it has a blank row, So I think I need to loop through each column and if if every row is blacnk then delete that column.

Here is the code that reads the file, I was going to remove the column from the table called table before I populate the table called dtAll , which is what my program uses
Dim safeFileName As String = IO.Path.GetFileName(Me.OpenFileDialog1.FileName)
Using myReader As New Microsoft.VisualBasic.FileIO.TextFieldParser(safeFileName)
Dim currentRow As String()
[Code] .....

View 7 Replies View Related

VS 2010 Remove Line From CSV When One Column Is Empty?

Jun 13, 2010

Ok i have a weird issue. I cant figure out what to use... CSV has two colums :-Name, MobileJohn Doe,60002000Jane Doe,Now i would like to delete the whole line if mobile number is empty.. i cant figure out what to use. Mobile number are 8 digits long.

View 11 Replies View Related

Why STRING Does Not Have A Parameterless Constructor To Create An Empty String

Feb 4, 2012

I was trying to call a method using Reflection on a method that has a STRING parameter.However a STRING does not have a parameterless constructor.So instead of something like.>>

Option Strict On
Option Explicit On
Option Infer Off
Public Class Form1


View 15 Replies View Related

[2008] Finding The First Empty String In A String Array?

Mar 2, 2009

i have a string array that i want to output to a text file. the array size is 10000. i fill the array starting from 0 with some strings. at the end, i only want to show the array from index 256 to the last array that is not empty (for eg. if the array is filled with data from 0 to 2000, i only want the text file to show the data from 256 to 2000 and ignore the remaining strings). Is there any function to do this?t i use is shown below

Dim myArray(10000) as string
Dim strArray As New System.IO.StreamWriter("c:List.txt")
strArray.WriteLine("{0,10}{1,30}", "Index", "Symbol")


View 8 Replies View Related

.net - Get A String From A Regex Match?

Aug 1, 2011

I have :


I think I have explained my problem properly..

View 2 Replies View Related

Match A Word In A String?

Apr 18, 2011

I'm currently trying to match a word in a string - to a word in an 1 dimensional arrray.

So it does this.

1.Goes into array, gets first word.

2.Looks for that word in the string.

3.If can't find it, go to next word in array.

4.And so forth until it finds it or runs out of words in array.

Problem is the string can be upto 2000 characters long. And the Array with the possible matches can have upto 8000 entries.

So when it runs, if the word begins with 'A' it finds it dead quick as the 'A's are at the top of the array, ordered alphabetically. This is great.

But if the word starts with 'Z' then it takes 4-5 seconds before finding it.

I'm basically using InStr to find the word in the string.

View 5 Replies View Related

Match The Value In Textbox To String?

Jun 9, 2011

how to check if the user input has a match in my given string

Dim a as string
a = "abc"

if the user input in the textbox "erty" the message box will be shown string not found. if the user input 123abc the message box will be string found

View 3 Replies View Related

Clear And Reset All Of These By Clicking A Reset Button?

Jun 4, 2011

I got on my form textboxes, checboxes but also a groupbox which holds texboxes.

The idea is to be able to clear and reset all of these by clicking a reset button.

At the moment i got this
Private Sub ClearFields()
Dim ctrl As Control


But ofc Me.controls isn't gonna get involved with the stuff in the groupbox.

View 4 Replies View Related

C# - Retrieve Not Empty Rows In First Column Of Excel Sheet

Feb 4, 2011

My requirement is to read all rows of an excel-sheet in first column that are not empty, are numeric and have a length between 15 and 20.

For example:

This column might have a header that is not numeric and there might be empty rows. This would cause an exception when importing them via SqlBulkCopy. So i want to prefilter the correct rows via OleDbCommand.

What I have tried so far is following(C# is also appreciated):
Using connection As New OleDbConnection(sExcelConnectionString)
Dim schemaTable As DataTable = _
connection.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, _
New Object() {Nothing, Nothing, Nothing, "TABLE"})
[Code] .....

But this throws an exception if there are empty rows or the format of the value is incorrect. So my question is: How to restrict the rows of OleDbCommand to:
Get only first column of every worksheet
All values that are numeric
Skip empty values
Ideally only the values with a length between 15 and 20

Any way how to skip the empty rows, Or do I have to to select the whole datatable? I hoped it would be possible to do that only with one query because of performance reasons.

View 2 Replies View Related

Hide Radio Button If Detailview Column Is Empty?

Jul 15, 2011

I try to hide the radio button if the cell is blank but the radio button still show even the cells is blank. why the radio button will not hide?

Dim temp As String = questionDetails.Rows(3).Cells(1).Text
If temp = "" Then
Option3.Visible = False


View 6 Replies View Related

Compare Letters Of A String To See If They Match

May 18, 2012

I am making a question and answer game, and I would like to be able to give the user some slack in the answers if they were to misspell a word by a letter or two, like if the answers was Jumps and they type Jump if you did a comparison of them like If string1 = sring2 then do whatever,  but obliviously those to string dont match, so it would return false, even though it is the right answer, I came up with this routine to compare two words and if the percentage of the letters are higher then 82 % right it will give you credit for your answer.


View 7 Replies View Related

Find Match In MultiLine String?

Nov 21, 2010

i have a string named Workers that had multiple lines of text. I need to search those lines for the term "BackGroundWorker1" if it is found then do something if not do something.

View 3 Replies View Related

Javascript - Getting The Closest String Match

May 2, 2011

I need a way to compare multiple strings to a test string and return the string that closely resembles it:


(If I did this correctly) The closest string to the "TEST STRING" should be "CHOICE C". What is the easiest way to do this?

I plan on implementing this into multiple languages including VB.net, Lua, and JavaScript. At this point, pseudo code is acceptable.

View 8 Replies View Related

Match Special Character Anywhere In String?

Feb 21, 2012

I am not a regex guy, so I need a little help, just cant get my head around this...

I am writing registration page and using asp.net validators. I need a regex validator to match a special character anywhere within a word, so it will satisfy requirement which says that "ID must have at least one special character." Allowed characters are[code]...

Once again, I am a junior, and having problems with wrapping my head around this stuff at this moment..

View 4 Replies View Related

Regular Expression - Match A String

Jul 2, 2009

I want to match a string for example "yes" but where it is not in brackets so that the following would be matched: yes (bla yes bla) bla yes

View 7 Replies View Related

Regular Expression : Match A String That Contains A,B,C,D,E And F?

Jul 2, 2009

I want a regular expression for the following issue:I want to match a string that contains A,B,C,D,E and F. string length should be 0 to 6. and not character should be repeat in the string.Example: ABCDEF, ACDEFB, EFBCDA, etc. but not ABBCDES/W Engineer

View 3 Replies View Related

Simple Regex Match String?

Aug 11, 2011

I have a simple string : s:10:"char1";s:2:"13";i:1;a:8:, i'd like to match that 13 from inside " ", in PHP i would do something like :
/s:dd?:"char1";s:dd?:"(.*?)";i:dd?;a:dd?:/i but i'm not good in vb's match methods,so please give me full example how i can match what i need ( it is possible to be multiple matches (2) ).

View 1 Replies View Related

String Match Whole Word And Replace?

Sep 30, 2011

I'm trying to replace a string with another but the problem is that the string is matching some other string partially.

For e.g. -
Dim x as String = "I am Soham"
x = x.Replace("am","xx")

After this replace I would only like the word am to replaced with xx but because my name also contains am its also getting replaced.

View 2 Replies View Related

Returns The Property Names As Column Headers And Empty Fields?

Jun 14, 2009

why this code returns the property names as column headers and empty fields?

Dim table As New List(Of SalesPersonClass.SalesPersonClass)
Dim i As Integer
For i = 0 To salesPeople.GetUpperBound(0)
dgSalesPeople.DataSource = table

View 6 Replies View Related

VS 2008 DataGridView Cell Status - Check Where Column 0 And Row 0 Has Value Or Empty

Jan 22, 2010


IF cursor leaves column 0 and row 0 then it displays msgbox but I want to check where column 0 and row 0 has value or empty In case of empty cell it must display msg as
msgbox("this is empty cell")

View 4 Replies View Related

Copyrights 2005-15 www.BigResource.com, All rights reserved