Columns Not Bound To DetailsView Get Set To NULL On Update
I've got a page with a DetailsView. It uses a SqlDataSource which itself
uses stored procedures for Select and Update.
I don't want the user to see some of the columns, but if I don't bind them
(or if I do bind them but set Visible=False), when the Update procedure is
called, the parameters corresponding to the columns that weren't bound to the
DetailsView are all null.
This can't be an uncommon scenario, so I guess I have missed something. Any
ideas?
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I'm trying to update an acccess database using asp.net (vb.net)
Can anyone tell me why the following code does not update the columns
Dim sqlUpdate As String = "UPDATE tblForumMaster SET Replies = @Replies, LastUser= @LastUser WHERE ID = @MasterID"
Dim objCmdUpdate As New OleDbCommand(sqlUpdate, objConn)
objCmdUpdate.Parameters.Add("@Replies", intReplies)
objCmdUpdate.Parameters.Add("@MasterID", Request.QueryString("MasterForumID"))
objCmdUpdate.Parameters.Add("@LastUser", strUserName)
No errors are produced so the syntax passes but the update does not happen.
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I would like to update a field with the value of a "empty check box". The problem that my numeral field (kom1) in the db will be emty, instead of 0.
I need the value 0 becaus it's used by a SUM in an query.
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I would like to update a NULL value in "LEDef _Champ1" of the table "dbo.LEDef "
Here is the asp code :
objUpdateModule.CommandText = "UPDATE dbo.LEDef SET LEDef _Champ1=xxxxxxx WHERE LEDef_PK=1245
objUpdateModule.CommandType=adCmdText
objUpdateModule.Execute
Could you tell me what I have to put instead of "=xxxxxxx"
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Anybody know how to do a SQL Update in asp.net using the OleDbCommand Parameter. that has a parameter that is to be NULLED?
sqlCommand.Parameters.Add("@date", ????);
is what i need to do the update w/ a null specifically i am updating Nulls to a date field in my DB.
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I have made several Access-based CMSs but now I am using SQL Server. I can read the records but my first attempts at writing are resulting in new records (with new ID) but all the fields are null.
I am posting the data from a form to the same page and an if /then statement catches the flag in the URL and runs the update script below. All the field names are correct. Code:
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I am attempting to pass null as the input value from a series of
textboxes if the user does not input a value prior to submit. To try and do
this, I am using a vbscript function on this asp as follows:
CommentsAdd = IIf(Request.Form("Comments")="",NULL,Request.Form("Comments"))
I was hoping this would convert those emptystring textboxes to null.
Then, these variables are input in an update stored procedure called from
the same asp upon submit. This handles ntext and like fields in the table I
am updating, but a null value passed in this way for a numeric field chokes.
The error on the asp is something like, "unable to convert value of type
text to numeric". Can't null be passed as a parameter value when the field
type is numeric?
How does one pass null for a parameter's value in a stored procedure on an
asp? Am I missing something here?
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I'm new in ASP.NET programming and I'm using a DetailsView to view/edit colums in a SQLServer table. Is there a way to reference the actual displayed value of a column and use it to select a group of records from a different table?can I have an example in VB.NET?
If I use a DropdownList instead of a DetailsView I can reference the current
selected value as <asp:parameter .... PropertyName="SelectedValue" ...
What about DetailsView control?
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I'm using the detailsview to perform edit and insert of new records via an
object datasource.
If an error occurs on the insert, I want to preserve the data the operator
tried to input, along with my error messages. Currently, it appears that the
detailsview is trying to rebind after the error, to the empty/null detail
item(on insert it is null), and thus I lose all the operator's input. Can
someone suggest the proper way for me to achieve the persistence I'm looking
for?
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I have an interesting situation that needs to be addressed ASAP.
I am running a standard SQL Query in ASP to retrieve some rows/columns from a table that's on a SQL Server 2000 database. I put the results of that query into a RecordSet, and then use the GetRows function to push the results that are in the recordset into an array variable. In the query that I am running, 39 columns and 2 rows are returned.
The GetRows function appears to be working - the array variable is being created with the proper dimensions. However, the values of the different "cells" of the array are not showing up correctly. The first and the last column values for each row are correct, yet everything else in between is blank, empty, NULL, or whatever.
In other words: ArrayVariable(0,0) shows up correctly, ArrayVariable(38,0) shows up correctly, but everything in between is null.
I did a test on the RecordSet and discovered that it was the culprit - it wasn't being filled in properly. This is strange, though, because the select query that I run in the ASP code to create the recordset returns perfect results when I run it on the SQL Server 2K database.
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reading the article about protection against sql injections faced that author recommends to
"use bound parameters (the PREPARE statement)"
examples are given in perl and java. Tried to find something for ASP, but did not find anything neither in web, nor w3schools, nor here. Could someone explain what is this and how to use it to prevent SQL injection.
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I am currently working my way through a tutorial from my asp.net book and am slowly getting an understanding how this type of coding works. However, I have come to a standstill with the code below. Code:
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i have a variable cup and works like this for each item in request.querystring
if cup <>"" then
cup = cup + 1
next
how do i get the maximum number in cup ? do i use ubound ?
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How can I make such a bold statement? Two words: Buffer Overflow.
In the very first class I took in programming (those many years ago), we were berated class after class about proper bounds checking to prevent buffer overflows. What this means in simple terms is that every time my program asked the user for input, it had better check to make sure the input fit in the place I reserved for it. If I asked for a ''Y/N'' and I got a ''yes'' or a ''no'', those extra characters had to go somewhere and I had better be prepared for them.
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I have an ASP that retrieves data from a SQL server database. Most of the columns are varchar. Some of the fields are meant to populate input fields. Here is my code.
<input type = "text" name="comments" value =<%= rstSimple.Fields("comments")%>
the value is returned, but only the 1st word. It seems it cannot process a space, but when I add the following to a table;
<td><%= rstSimple.Fields("defects").Value %></td>
the whole value is returned. Is there a limitation to the input field and how can I change it?
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How do I find out how many columns exist in a SQL Server DB table before displaying the records of that table?
Also how do I get all the column names as an array so that I can seperate each column using the Split function?
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I have a small doubt, my access database has been moved to SQL Server. Now I had some columns say [Where NoP] and similar many such columns. Are these columns going to work, since some of my queries are returning error. When i change the column name to say WhereNoP, it works fine, but in that case, I have to check around 300 forms where the column name is mentioned. So any clues to make such column types work.
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I want to make a listbox which will show the results of two fields (the ID and the Name) of one table , but the one field (ID) will be the one to pass.
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can't seem to get this ADOX code to add columns to existing Access 2000
table what's missing ?
Sub AddTableFields()
Set tbl = Server.CreateObject("ADOX.Table")
set cat = Server.CreateObject("ADOX.Catalog")
cat.activeConnection = conn
With tbl
.Name = "events"
Set .ParentCatalog = cat
.Columns.Append "MaxEntries", adInteger
.Columns.Append "CurrentEntries", adInteger
End With
cat.Tables.Append tbl
Set tbl = Nothing
Set cat = Nothing
End Sub
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I have a SQL 2000 table with data I display in three columns. The code
I am using sorts the data horizontally but I need it sorted vertically.
Here's the code I am using. Perhaps somebody can help me find a way to
modify it.CODE
response.write "<table width='100%' cellpadding=1 cellspacing=0>"
if not oMain.eof then
count = 0
do while not oMain.eof
if count mod 3 = 0 then
'there are 3 in the current row, so end the row and start a new
one...
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1 2 3 4 5
6 7 8 9 10
11 12
...every one of this 12 is a name
printing a name + checking if is there some ditails reffered to this name in other table column...
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I access an access-table by this SQL-ADO-string:
SQLGetInfo1 = "SELECT * FROM kalender ORDER BY year DESC, month DESC, day DESC;"
Set rsGetInfo1 = DBConn.Execute(SQLGetInfo1)
Now I want to drop all the names of the columns, that is the field names, into a 1-dimensional array (or perhaps some ordinary strings, doesn't matter), but how do I do that? I tried with some rsGetInfo1.Fields.Name() and stuff like that, but the bottom line is, I don't really know how to fetch that property.
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Anyway, the table has 40 possible columns so I'd like to limit it to display
only 3 columns: I can generate the field names below: Code:
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Okay there is an unique EventRegID for every registration. When people first register they get pre-registered. Then an admin comes in and confirms or wait list them (based on whatever requirements). My question is how can I tie the EventRegID to a form with multipule ID's so they can batch confirm or wait list the PreReg list? Code:
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A Form has a select list which lists all the column names of a SQL
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displayed to him. This is the Form code:
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