Forms Data Controls :: Cannot Insert The Value Null Into ColumnID With Gridview Update
Apr 14, 2010Using vb.net/asp.net 2005.
I have to bind the value
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and I have the sqldatasource as follows:
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Using vb.net/asp.net 2005.
I have to bind the value
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and I have the sqldatasource as follows:
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I have a typical gridview/formview master control setup. When I try to update or insert I don't get any errors but it also doesn't work. When I try to insert data all I get are null values and when I update, none of the values are updated. The formview looks like its working, but just doesn't. The primary key is an identity and it auto-increments by one.
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Basically, the user Selects a row on GV that executes an Insert into a table the GV cell values of the selected row.
The SQL field data type is varchar. If the GV field is Null, the Insert adds the value to the SQL field. How do I keep the @nbsp; from being displayed in the cell of a data control when it is called at a later time? Do I add some more asp to my control parameter? do I add some vb code behind? Here are some relevant code snippets of existing code.
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I have a Gridview showing the data on one of my tables, and when I try to edit the data in one of the columns after I click update, rather than updating the record with the new value I typed in, the rows become null as in, everything in the row I just edited disappears. This inmediatly makes my application crash because one of the fields in my table (IssueDescription) doesn't allows null values.
This is the code, which is actually 100% auto-generated from when I created the GridView control and specified in the options to implement update, delete, edit options.
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" DataKeyNames="ticketNum"
DataSourceID="SqlDataSource1" [code].....
What is making the rows turn into null after the update? I did some research and tried to define the Update behaviour myself using RowUpdating function. After hours of learning how to use it I got it to "work", but because the Update turns everything to null when it updates, the sqlconnection command I use to do the query sends null anyways. I can paste the C# code if you'd like to see it, though I'd rather not use it if the auto-generated by asp above can be fixed instead.
I am using Visual studio 2010 express and I have a details view databinded to an sql database table. When I use the Insert option on the view it causes an error due to it trying to insert a null into the primary key field. If the Insert function does not create a new primary key entry how is it created?
View 9 RepliesI have a gridview that i cant get to update or insert. Im new to asp.net,
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I have a gridview,when i do it is giving me null object reference error.
I am posting my code for your reference -
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My gridview code is -
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I have a formview tied to a gridview. The formview shows the data for the row selected in the gridview. The formview is invisible by default , default mode is readonly and becomes visible only on Selecting a row in the gridview. I make it visible in the SelectedIndexchanged event of the gridview. There are Insert and update buttons present outside the formview which perform the insert and update manually using code-behind.
After an insert or update on the formview, how do I retain the gridview selection?
I need a control to modify data from my data base tables like a GridView. Has ASP.NET the control that I need implemented? Who could I do that?
View 2 RepliesI developed a web site more then a year ago with .net2.0/c#/mssql 2005. it works fine but i was asked to replace mssql with mysql.
I wrote a class to complete data access works (unfortunately, I didnt use nhibernate or other data access tools :((
I edited the class to use System.Data.Odbc objects rather than System.Data.SqlClient.
It works fine in selecting data but not manipulating data. when i try to insert new data it adds null data for all fields in the table.
in debug mode, i noticed that it might be caused by OdbcParameter but not sure.
i want my gridView to be refreshed so i can vies the new records when i insert to formview.
Now i have to go to another address and back to se the updated record.
i cant even press f5 because then it just duplicates the record with the same text from the formview even if the fields in the formview are empty.
There is got to be a code for this!?
I'm coding my first VB web application, which allows a user to input an order number and pull up invoice and shipping data linkd to that order number.
I have the first bit down and working, where the existing data in the database is displayed in the GridViews. One of the GridViews is set up to allow data editing, and I have syntax set to make the row editable, but I'm struggling with getting the "Update" link/functionality to work. I want to assign the values in each cell to an object (ie. 'dgInvNumber' for Invoice Number), but everything I've tried (been doing a ton of Google searching for help, but no luck yet) keeps giving me an "Object reference not set
to an instance of an object" error when I click the Update link for the row of data being edited.
At this point, I don't know what syntax to use to get the edited values out of the GridView row and assigned to objects for each cell (I have a total of 10 cells that can be edited in a row).
For background info, the GridView is set up with Bound Fields. I'm using Visual Studio 2005. Alot of places I've looked talk about TextBox controls and using FindControl. Also seen some places talk about DataBoundLiteral Controls. I tried the latter with no luck (still getting error). For TextBox controls, I don't understand how to use that part, since it mentions referencing the TextBox controls declared in the EditItemTemplates of the TemplateField column fields in the GridView control. But I didn't set up anything in the EditItemTemplates (that I know of).
By using this structure of XML :
<?xml version="1.0" encoding="utf-8" ?>
<Countries>
<Country>
<CountryName>Australia</CountryName>
<LabelABN>ABN</LabelABN>
<TextBoxLimitABN>14</TextBoxLimitABN>
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or this :
<?xml version="1.0" encoding="utf-8" ?>
<Countries>
<Australia>
<LabelABN>ABN</LabelABN>
<TextBoxLimitABN>14</TextBoxLimitABN>
<LabelACN>ACN</LabelACN>
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I want to apply INSERT < UPDATE < DELETE < SEARCH (you can apply searching outside gridview if u wish) in gridview by using XML File Provided above as a data source ...
For your ease here's a link : INSERT UPDATE DELETE IN GRIDVIEW USING XML
How to use ObjectDataSource Update query from code behind.using edit and cancel button in GV asp.net.
View 1 RepliesI have a student data, when I put the student id in textbox, it show the students mark in gridview like
1st semester marks in first row , 2nd semester marks in second row ,etc
and i want insert 3rd semester marks , 4th semester marks for the particular student , and also , delete , update in gridview....
how to insert,update,delete row in gridview without saving in database ?suppose 1 textbox,1 button and 1 gridview .textbox and button outside of gridview.
what is the coding of this project ?
in griedview how to save dropdown list value save in sql server .
View 1 Repliesinsert update delete in gridview using sqldatasource in asp.net
View 1 Replies[URL]
How can I Edit/Update, Delete and save record to database
Insert Edit Update Delete (CRUD) in GridView using MySQL Database?
View 1 RepliesI have setup my business object to have a create_date and edit_date members both datetime datatypes. My company want to display the create_date and edit_date fields in a gridview for each transaction. The problem i have is that after insterting a record it will have a valid create_date but no edit_date and when displayed in the gridview it defaults to datetime.minvalue (My default). How on earth do i show an empty field in my gridview for a null datetime field in the database?
I am using similar architecture to the Imar Spaanjaars example of a tiered solution. With a few small tweeks it has worked well for me for ages. I am passing a List<Database> to my object datasource which connects to my gridview.
so i have a FormView bound to an SQL datasource.
Using the Auto generated insert/update/delete. "Cannot insert the value NULL into column 'UniqueID'"
The FormView Default view = Edit
I have set the PKey and the Datasource is loading the record from a session. The record is loading no problem, just wont update.
here is my latest bit of insanity. I'm using a formview control. In the insert template, I'm grabbing applicable values from my AD to populate a dropdown list. I select the user I want to insert, enter the other pieces of info required for my request and click Insert. The query responds back stating that the userid is NULL. So the big question in my mind is how can I bind userid to the dropdownlist if I'm populating that from the code behind? Here's my code behind code for that list:
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I have this error when trying to insert a new record through a 'New' button in asp:DetailsView control. Error details:Message: Sys.WebForms.PageRequestManagerServerErrorException: Cannot insert the value NULL into column 'idUser', table 'C:INETPUBWWWROOTVIEWS1APP_DATADBSEARCHRESULTS.MDF.dbo.UserDetails'; column does not allow nulls. INSERT fails.I have an typed dataset xsd & adapter, where i automatically generate delete, update, insert commands. I also use SqlDataSource.The field idUser doesn't allow nulls on database level, and in the xsd I marked the following properties:AllowDBNull = false, AutoIncrement = true, AutoIncrementSeed = 0, AutoIncrementStep = 1, ReadOnly = true, Unique = trueMy code is:
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How to solve the problem or where I should look for the problem?p.s. If i have in DetailsView, idUser field properties set: InsertVisible="True", ReadOnly="False" and i enter a value manually, the records successfully inserts.
I have a formview on a web page, set to insert mode as default. The form view is bound to a SQLDatasource. This datasource has a custom query written to select the details for this formview. The query joins two tables to provide relevant detail and not just an ID for one of the elements on the form view.
The first tabe contains information regarding projects and the second table contains detail regarding Resources. First table has the following definition:
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