Write String Value In A Double Column?
Mar 13, 2009I just want to assign a string value in a column that only accepts double.. There is any way to do it? I'm using a dataset and the code is this:
[Code]....
I just want to assign a string value in a column that only accepts double.. There is any way to do it? I'm using a dataset and the code is this:
[Code]....
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
[Code]...
I would like to know if Visual Studio does have a setting where you can choose whether it should write nombers like 0.00000127 in scientific notation or not? I am writing such doubles to file but VB2008 writes them in scientific notation. If I treat these numbers as decimals then it writes them correctly, but I also have to take care of performance as I'm writing lots of numbers.
View 1 Repliesi would like to be able to double click on a label for a text box and write a value into the .tag property and then change the color surrounding the label.for example.. if the user double click the default label..(which looks like the stardard label) then I would write a "1" to the tag property for that label, and at the same time, change the line color surrounding the label to red(maybe even changing the thinkness of the line).
when the user would double click the label again.. I was see that it was already selected and change the setting back to the default.
I've been just making random programs trying to get the hang of the new language this time I was making a leap frog game where it switches back and forth beetween frogs every time a button is pressed. It also checks if the frog can land in the text box above the button pressed, if there is another frog there a message box will pop up saying sorry space is filled other wise the frog should land there.
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The error message says "Conversion from string "frog1" to type 'Double' is not valid." I understand what a double is but I've tried And If and that causes a bunch of errors.My Question is whats wrong with this cod and how can I make a double if statement???PS I did try to make an array to shorten this but thats in a different fourm will post URL later
I need to be able to double-click a row or column in a row to use a field (in this case the Student ID field, the 4th column if counting form 0) to get that row from a database onto a separate form and be able to edit and save it. I have no idea how to make this happen since it is not covered in the class beyond basically displaying database data in DataGridView, I chose to use this functionality in my final project (to be fancy I guess) with the thought that it will be easy to accomplish but am finding it is not quite as easy as I thought. My current code is below;
[Code]...
I want to get a value from crystal report on double click on any column value in crystal.and then open a sub report based on this clicked value.. I am using Visual Studio2005 crystal report.. Is this possible with this version.
View 1 RepliesI want this for a windows forms application (vb.net '08). I want a code for: I have a column called total that is of datatype double in SQL Server 2005. How can I sum this field or column in crystal report?
View 1 RepliesI have a DataGrid, when the user double click on it I want to know the columnname and the value of the cell being clicked.
View 2 RepliesI would love some help on how to get a DataGridView's Row & Column location on a mouse double click. My program requires that I dynamically add n-number of tabpages with DGV's so I declare my own class that inherits TabPages and creates its own DGV control.
For the code below I use a simple form (form1), add a tabcontrol via the forms designer (tabcontrol1) to it and remove the two default tabpages keeping the basic tabcontrol.
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i need to do a macro. this is what my excel looks like
1 2 3 4
seq1 name name seq2
abcde vv1 abcdddd
abcxy vv2 abcdlmn
[code]....
I'm having a problem with my DataGridView. When I double-click on any column, with exception to Date & Time, the grid advances by 1. As you can see the 2nd row is highlighted in blue, I actually double-clicked on the first one, under "Sent By." (See attached image)
Here is my code
VB.NET
Public Class frmPickAssignment
Dim dteStart As Date
Dim dteEnd As Date
[CODE].................................
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 =
I make a query in coding. But I got conversion error.My query is below
Dim strSelect As String = ""
strSelect = "SELECT " & _
"Description As [Desc], " & _
[code].....
Exception error is like
Conversion from string "iif(CurCons = 0, " to type 'Double' is not valid
Actually, in my report, i wanna show if it's zero then '-'. If i set it in this string.I got another error like below The provider could not determine the Decimal value. For example, the row was just created, the default for the Decimal column was not available, and the consumer had not yet set a new Decimal value.
From da.Fill
Dim cmd As New OleDbCommand(strDynamic, m_DBConn)
Dim da As New OleDbDataAdapter(cmd)
da.Fill(ds, "tblCur")
i am converting a string to double?i would like to know in advanced whether it would case an error to convert a string to a double. for example if i try to convert "hello" to a double, it would give me an error. is there a way for me to know ahead of time whether converting something will cause an error?
View 2 RepliesIf Double.Parse(list_numbers.Item(i), possibledouble)
list_numbers is a list of strings
list_numbers.Item(i) = "0.000"
possibledouble is a double
debugger returns "input string was not in a correct format"
i thought that the double parse would convert the string into a double format of "0.0" but it gives me an error.
I'm reading Lat + Lng coordinates form my database. I need to convert them to double. This is what happens:
Dim strLat As Double = CDbl(reader.Item("lat").ToString) MsgBox(strLat.ToString) ' << result: 5237861 should be: 52.37861. The point is removed.
I want to convert the string value "13.3939" into a Double yet when I tried Convert.ToDouble("13.3939"), Double.Parse("13.3939") and CDbl("13.3939") they all returned 133939.0. Does anyone know how to do this properly?
View 1 RepliesIs there an efficient method in VB to check if a string can be converted to a double?I'm currently doing this by trying to convert the string to a double and then seeing if it throws an exception. But this seems to be slowing down my application.
Try
' if number then format it.
current = CDbl(x)
[code].....
The message does not appear if a number is not entered - why?
Dim
IAL As Double
Dim inputIAL As Double
[Code].....
I was trying to convert from Double to String and everything working fine. But when I tried some bigger number with fractions in it. I got the number but rounded. I tried something like that:
Dim dd As Double = 1235212435.3453636
Dim str As String = dd
MsgBox(str)
But what I got is 1235212435.34536 instead of 1235212435.3453636
As I compare the DSO with the DSO para, it seems doesn't compare both data at all. I have been converting the DSO as double first between comparing it as if i compare with string it doesn't work.
Dim dso1 As Label = CType(e.Item.FindControl("dso1"), Label)
If Not IsNothing(dso1) Then
dso1.Text = e.Item.DataItem("DSO").ToString
[Code].....
I would like to format double number like below;[code]Is this possible?
View 1 RepliesI want to convert string to double.
[Code]...
num should be 1.5432 but i get 15432 How can i get as it is in the string?
Public Class frmWaiter
Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click
'Bill Amount Input Box
Dim txtBillAmount As String
[code]....
I have a problem that seems trivial. In an argument to an activity I need to supply a path.
This is done by this code:
String.Format("a
-bd -y -tzip {0} {1}* -r",
Path.Combine(BinariesDirectory,
"output.zip"),
BinariesDirectory)
However, the directories parameters contain spaces so they have to have quotes around them. I tried with single quote ' that works fine to put in the string, but the command shell executing the command ignores these. So it has to be double quote "
I have tried all methods I have fount on the Internet, for example to have a backslash before the double quote and to have three double quotes, but nothing seems to work. I get a compiler error as below.
Error 4 Compiler error(s) encountered processing expression "String.Format("a -bd -y -tzip "{0}" '{1}*' -r", Path.Combine(BinariesDirectory, "output.zip"), BinariesDirectory)".Comma, ')', or a valid expression continuation expected.
I created an application in vb.net 2005.It works fine on my machine. I tested several different test machines and all were working fine. As for the client, it's generating an error. My application reads from an excel sheet and imports the values to an oracle database. the error being generated is: "conversion from type string to type double is not valid". Why is it generating on on the client's computer and not mine?
View 6 RepliesI have a on memory Datatable like this.
I want to produce xml file like this.
The URL (e.g. http:www.mymusicwebsite.comsongs) will always be the same.
I am developing a asp.net web application, i have a string (with a value in it from a database), with multiple lines that i put in a TextBox with mulitline type. (textarea)
Now the problem is, that in the string are multiple lines, with much empty space. so i want the remove only the double linebreaks.
[Code]...
I'm trying to match on some inconsistently formatted HTML and need to strip out some double quotes.
Current:
<input type="hidden">
The Goal:
<input type=hidden>
This is wrong because I'm not escaping it properly:
s = s.Replace(""","");
This is wrong because there is not blank character character (to my knowledge):
s = s.Replace('"', '');
What is syntax / escape character combination for replacing double quotes with an empty string?