i've been training in vb for 2 years and i have never come across this error and i dont know know to fix it.
Public Class Racing
Dim FileName As String
Dim NumberOfRecords As Short
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Where i have highlighted are the usaual culprets for turning yellow and an error message coming up sayin "bad record length".
this is not working?
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End WhileI am trying to read from the ": " to the end of the line. I keep getting this error: Index and length must refer to a location within the string. Parameter name: length
"Index and length must refer to a location within the string. Parameter name: length" whenever I run this code
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I'm getting an error message when I try and save record data to a file.The error message I recieve says 'Bad Record Length', and highlights the following code - FilePut(filenum, customer)
1. Can someone please explain to me what the error message means?
2. Can anyone suggest a way to rectify it?
I am doing a project as part of an external exam, previously i had been using just a variable to store my data. But i kept getting a bad record length error so i switched to a dynamic array but now my project is not looping properly. When i click submit the manually input data by the user is supposed to add to a Dat file and also add to a list box but when i click submit the new information over writes all the previous information that has been input. Here is my
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I have a control thread that starts up a secondary thread and when the secondary thread finishes, the control thread restarts the secondary thread. On this secondary thread, I use a stopwatch to record a thread.sleep event. Is there any reason, under any circumstance, why the stopwatch elapsed millisecond value (499) would be 1ms less than the sleep time (500 ms)This doesn't happen all the time or even a lot, I'm just curious if there is any physical reason for this to happen.
View 1 RepliesWhile I've previously many years of relational databases and procedural languages, I'm stumbling with Visual Basic. In this problem, the simple situation is that I have two files, parent and child. The primary key of the parent file (Area file) is linked by a relation to one of the two fields that makes up the primary key in the child file (Project file) (unique key is formed from 'area' and 'project'). I have the default table adapters created on both files. I have created two maintenance forms showing one each of the two files in datagrid view format.I can create some records in the Parent (Area) file, but when I try to create a record in the child (Project) file, using one of the valid key values from the Area file, I get the 'ForeignKeyConstraint [relation name] requires the child key values [actual value] to exist in the parent table' which I'm absolutely definitely sure it does.
I haven't done any actual coding for those two maintenance forms, just dragged-and-dropped the files from the data sources screen onto separate forms so it creates the controls itself. But I can't work out, if it already knows the data does exist because I can load it back in to the Area maintence form, why it can't check itself to find out the record does exist. Why does it think the record from the parent record doesn't exist? It does exactly the same thing, whether or not the database is in access or SQL Server Express. I have all the latest updates.
I keep getting the error saying that index and length must refer to a location within the string. I am sure there is just something minor that I am missing but I am having a difficult time figuring it out.
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I'm converting some php code that tries to get a string to a length that is divisible by a certain number, say 10. To do so it appends "�" to the string to make up for the difference. In other words, it does something like:
dim difference as integer = 10 - (str.Length Mod 10)
for i as integer = 1 to difference
str += "�"
next
But the problem for me is that "�", which is the ascii code for the null character, is two strings and I don't believe that when VB loops over resultant string it will view that as one character. what could I append the string with to retain the expected behavior?
I am receiving the following error when trying to replace spaces with %. "String cannot be of zero length. Parameter name: oldvalue" Dim Keywords As String = "test abc" Dim sqlkeywords As String sqlkeywords = Keywords.Replace("", "%") I have also tryed sqlkeywords = Replace(Keywords, "", "%") and it just returns the original.... test abc.
View 1 Repliesim basically working on my final years project on the vb.net with the ilog business rules. i have trouble solving this error :Index and length must refer to a location within the string. Parameter name: length And the output show this :[size=2]
View 4 Repliesin Visual Studio 2008 Visual Basic, keep getting error 91 trying to use a fixed-length arrray in a windows form. am importing System,System.IO,System.Data,Microsoft.VisualBasic,System.Data.SqlClient. declared at start of class entry for form . have tried both Dim and Public, as Values(0 to 50) As String. then referenced in a procedure as Values(1) = I have read do not indicate that I need to use a Set or New function.
View 4 RepliesI keep getting the error saying that index and length must refer to a location within the string.
Public Class MainForm
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
Dim description As String = String.Empty
Dim invCount As String = String.Empty
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i am trying to build, or better edit, my own HTTP Post Request Source Code. The main purpose if it is working, and i receive the data successfully but when i try to put a progressbar with it, it starts getting sticky, because the ContentLength will always stay -1. [Code]
View 4 Repliesam getting the above exception while swaping Items in the list(lstRoutePriority).PFB my code
if (lstRoutePriority.SelectedIndex > 0)
{
//Swap the two items
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why error "Index and length must refer to a location within the string."appear when the process of the program is going to executeNonQuery, i'm looking the error for 2 day's i still can't find it.
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why when i upload less than 10 item the program do but more than it like 15 and above the program give me error saying "Index and length must refer to a location within the string."
here is my codes below
For Each myDatarow In tblLocal.Select("sync ='0'") '
' tblServer.ImportRow(myDatarow)
' dataimpt = myDatarow.Item(4).ToString
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the error appear when the program is going to update the 14th data... meaning from 1st to 13th data program works in the 14th it's not it gives me error "Index and length must refer to a location within the string
I'm working on a vb.net project, when I execute the project I get the following error message: "error message: index and length must refer to a location within the string"
Public Sub New(ByVal lineIn As String)
parent = Trim(lineIn.Substring(0, colStarts(1)))
enfant = Trim(lineIn.Substring(colStarts(1), colStarts(2) - colStarts(1)))
des_F = Trim(lineIn.Substring(colStarts(2), colStarts(3) - colStarts(2)))
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I get the error msg in the line marked bold. When i checked the input file, the length of all the fields looks fine. I dont understand the cause of this error.
I have a field displaying on a datagrid that the user has asked to be variable length based on the data that is returned. Is there an easy way to determine how many characters are returned for a field and then converting that to a pixel length so that I can change the length of the field in the code.
View 2 RepliesI hav a web service which pull records from a database and I am hosting these services in IIS which works fine but I am trying to retrieve the record and display the record in a listbox displaying the time field as the text for that record.I have created the following function
public sub get_data()
dim dt as new data.dataTable
dim service as ws webservice.webservice
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If using the following in an if statement I get an error: If trg.Name.Substring(4, 6).ToUpper <> ("ABCDEF") Then I get the error: "Index and length must refer to a location within the string. Parameter name: length"
I assume this is because the string (trg.name) is too small for the 4, 6 substring. What would be the correct method of working around this problem? VB.net Studio 2008.
Im trying to add a code which adds a record for me and then saves it. I am also trying to add a code which deletes the record for me.So far, my "Add" button, clears the form, which is what I want. Then when I click on save, I get a error. I also get the same error when i Click Delete. This is my code for my "Save" button:
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I have 2 tables in a database. Database CUSTOMER.MDB, Table1 fields are - CustomerID, Name, Address. Table2 fields are CustomerID, Itemname, Amount. I have created a form where I am using Table2 for Dataentry. I want to write code on CustomerID Lostfocus that 'When I enter CustomerID in the form it should check the CustomerID in Table1 and if exists it should print the NAME from Table1 in a Textbox. If not found it should give a msg.'Both the tables are linked on CustomerID.
View 5 RepliesBasically I have no idea how to amend a record. I want to amend a record using controls displaying the details. The problem is that i can't find a book that talks about updating a members record. By the way I am using Random Access Files to sore details in
View 14 RepliesInstead of using the binding navigator, I would simply like to use buttons. I'm familiar with the .Fill/.update etc. But what would create a new record?
Using:
Me.LTC_FBSTableAdapter.Fill(Me.BCPM_DDBODataSet.LTC_FBS)
Me.LTC_FBSTableAdapter.Update(Me.BCPM_DDBODataSet.LTC_FBS)
I am using this code to update a record after searching but it gives me error
here is my code
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I have a form that on load keeps closing without any errors... I have no clue what it wrong with it. How can I record all the lines of code being executed so that I can find out why it is closing. There are no errors or me.closes.
View 3 RepliesI am trying to check a record in database before inerting a new record here is my code but problem is when i enter a names first alphabet it imediatly populate massage. i want to check it after entering whole name
Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Try
Dim cnString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" &
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im having problem with my simple library i dont know what is the code to search a record in the data grid im ung adodc any one kindly help with my project only the search code.. is my problem so how to search in the data grid? url...
View 16 RepliesHere's the code that fails on update with a fail on Insert Into syntax message:
SQLConnect = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:TechTest-NDT.accdb"
' SQLConnect = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=D:TechTestDatabaseNDTQA.mdb"
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