I have a form where users upload a file (csv), then the server does some processing, and generates a datatable. the table will be shown in grid. however, the table's column is unknown, and sometimes, the table is huge. I need show this table in another form.
It seems session variable is not good for this since the table maybe huge. is there a way to write this table to sql, then load it again in the other form?
How can i save the datatble back to my database?
First i selected some rows from database then using adp.Fill(DT) i filled datatable then i closed connection.
Then i made changes in this datatable in some rows & now i wonder how can i send this rows back to database?
NOTE:-i modified my datatble using FOR loop .and i set cells to someother values like dt.rows[2][2]="anything i want";
Is it possible to convert a datatable into binary data and save it into on a binary field on database?
View 2 Replies[URL]
How can I Edit/Update, Delete and save record to database
How To Save Video files into folder and save path only into database in asp.net using c#.
View 1 Repliesone button i use to save form entity.and other is to navigate to next pagwhen i click on save button i use jquery to save form entity in database. and form remains as it is
<script type="text/javascript">
I need to remove the data stored in the cache after few minutes (Output and Data Cache).
My concept is binding data from server, storing it in to cache and displayed in the gridview, after a 10 seconds when the button is clicked the cache data should removed and need to show null like nothing. I have build some basic of code, how to get perfectly. I am new to dotnet.
find the below required points and attachments of asp.dot net code and sql query.
1. When page load, gridview should display using Cache.
2. when Clear Cache Button after 10 second from pageload is clicked then the gridview should go hide
3. Reload Cache Button is clicked the gridview again load.
Default.aspx
Default.aspx.cs
usingSystem;
[Code]......
I have an already created DataTable object which i am using for my girdview (asp.net) i also need to bind a column of that object to a DropDownList. The datatable has the correct details in the column but the column contains more that 1 of the same name in the column - hence I would love to just do some kind of SELECT DISTINCT on the datatable and copy it to a new datatable for use with binding the dropdown.
This would allow me to save resources by making another trip to the database.
Here is an example, the current datatable has a column called items and in this column has the following entries
1
1
1
1
5
5
6
And of course i need only unique items for binding to my dropdown, hence i need the following data
1
5
6
Of course i don't want to change the original datatable object but rather make a copy of it will the new details.
I have a Data table object that is populated with a sql call. The table has two columns in int. "CustId" and CustomerName"
using C# in the code behind, how can I populate my drop down list box in C# using the DataTable object?
My code looks something like this, but it does not work.
DataTable MyTable=PopulateTable(); // method call
customerDropDownListBox.DataSource=MyTable;
I am trying to run the 15 minutes movies MVC application but I got the following error:
Object reference not set to an instance of an object.
Description:
An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
[Code]....
Does anyone know how to get a csv url file and convert it to a json object so that I can use google charting tools in js?
View 3 RepliesAs I iterate through a DataTable object, I need to check each of its DataRow objects against the items in a generic string List. I found a blog post using the List's Find method along with a delegate, but whereas that example has a separate class (Person), I'm attempting something like the following using an instance of the string object:
// My definition of the List object.
List<string> lstAccountNumbers = new List<string>();
...
// I populate the List via its Add method.
...
foreach (DataRow drCurrentRow in dtMyDataTable.Rows)
{
if (lstAccounts.Find(delegate(string sAccountNumber) { return sAccountNumber == drCurrentRow["AccountNumber"]; })
{
Found_DoSomething();
}
else
{
NotFound_DoSomethingElse();
}
}
However, with this syntax I'm receiving "Cannot implicitly convert type 'string' to 'bool'" for the if block. what I'm doing wrong and how best to accomplish what I'm trying to do?
I am confused over this point that Connection with databse in ado.net is a managed object or unmanged object, from the past couple of years i was assuming that it is unmanged but a post from MSDN says it is managed (Correct me if i am wrong :)), i am attching the link of that post herewith
[URL]
I have updatePanel and hiddenField in it. I need to save object to hiddenField without full pastback (only updatePanel updating).ViewState can't help, because it works only with full postback.
View 1 RepliesI have a page like Order - Order lines. Order represents by some textboxes and ddls, Order lines represents by GridView.
I want to let users add order lines without save changes to database. For example: he adds 4 order lines, fill order info and then hits Save button. Only an that moment all information should be saved to DB.
When I use code like
using (Entities ctx = new Entities())
{
//create new OrderLine
OrderLine ol = OrderLine.CreateOrderLine(1, 1, "", 1);
//add OrderLine to OrderLines collection
ctx.CreateOrderLines.AddObject(ol);
}
newly created OrderLine does not appears in my object context, so I can't access it and bind GridView to new OrderList collection.
How can I solve this problem? Or maybe there are another ways to perform this task?
I have a table into the database. Table name is NewResults. I have created instance of NewResult called result and fill it with all the infos i need. Now when I try to add i dont have add method in
context.NewResults. -> no Add here. So if i enter context.NewResults.Add(result) error as below is shown:
Error 1 'System.Data.Linq.Table<UDWAutoLinqTry.LinqToSql.NewResult>' does not contain a definition for 'Add' and no extension method 'Add' accepting a first argument of type 'System.Data.Linq.Table<UDWAutoLinqTry.LinqToSql.NewResult>' could be found
(are you missing a using directive or an assembly reference?) C:Documents and SettingsAlek.NikolovskiMy DocumentsVisual Studio 2008ProjectsUDWAutoLinqTryUDWAutoLinqTryCompareCompareHelper.cs 332 32 UDWAutoLinqTry
what am i missing?
I know that i dont have to create add method myself i was googling and i am doing everything as it should but still no luck?
I am trying hard to update a business object inside a List<>.
I am using a checkbox list
When a checkbox list item is clicked I check if it exists, if yes I mark it as Dirty (means the user unchecks an item)If not, I add a new item to the list (means the user clicks a new item)and store it in view state
How do I update the Generic List with the Dirty Object ?
On form update, do I foreach and make separate lists of dirty and new objects to send to DB layer or would you recommend any other way ?
Here is my code.
protected void cblExclusions_SelectedIndexChanged(object sender, EventArgs e)
{
if (cblExclusions.SelectedIndex != -1)
{
ftExclusions myExclusion=new ftExclusions(); // Business object
[Code]....
Okay, here's something that I could easily do the hard way and manually wire up each form element and save it to a datatable in memory, but there has to be a more efficient way to do it.
Here's what I have:
1. A strongly typed datatable and tableadapter in a XSD name Orders
2. A formview control which currently is connected to an ODS connected to the Orders tableadapter, this makes it easy to wire up the databindings for each form field in design view
I would like to:
- bind the the formview to an instance of the strongly typed datatable, and then save the dt to a session object without interacting with the actual database
- load forms on subsequent pages from the dt in session
- ultimately save the dt info to an actual database table on the third page
I've read some solutions where a custom class is created, but to me this seems like almost as much work as wiring up the form field to the table columns manually in code.
What is the best way to insert and retrieve images like :
In the database in binary form retrieve it with imagehandler, or
In the database by saving the path of the folder of the images and retrieve it, or
by saving the images directly to the folder and retrieve it...
When I try to save an object reference in a view state it tries to save the object content using serialisation. to save the object reference only to apply to this object instance after postback?
View 5 RepliesThe a way to save an object in session with expiry time , such as when you're saving object in cache.
View 12 RepliesHow to know the FileName AjaxFileUpload in the event Click of a Button without going through earnest for this is what I found that is to say that the FileName is only in the event Designed AjaxFileUpload1_UploadComplete.
protected void InsertButton_Click(object sender, EventArgs e) {
lblMSG.Text = ViewState["filename"].ToString();
}
protected void AjaxFileUpload1_UploadComplete(object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e) {
ViewState["filename"] = e.FileName;
}
protected void AjaxFileUpload1_UploadComplete (object sender, AjaxControlToolkit.AjaxFileUploadEventArgs e) {
string filePath = "~ / upload /" + e.FileName;
AjaxFileUpload1.SaveAs (filePath);
}
'DataTable' is an ambiguous reference between 'System.Data.DataTable' and 'Microsoft.Office.Interop.Word.DataTable'
View 3 RepliesI have several web sequential pages which will modify a record and its child records in the database, called a "project". Such a project is currently passed between pages using its database ID in the URL parameters.
A project has some information specific to itself, and also consists of one or more Tasks, which each have information specific to itself.
Is it faster (alternatively, more maintainable or more easily understood) to hit the database each time I need to query the same project (and its tasks), or should I query the database once (either once for each page or once for all pages and save to Session) and check the saved object rather than the database?
Recent we are deploy(Setup and Deploy) our Product which is develop in ASp.Net(C#) using SqlServer Here We Face one Problem i.e.
When we install the porduct there is no issue if we manually run the sqlScript file in sql server(manully we create the DataBase and All DataBase Object i.e. Table,StoreProcedure,Function,Views....& We are enter the Sample Data) But We know that is not the Right Approch.
Any one Can tell me the procedure "How to Building DataBase & All DataBase Object with Sample Data when we click the Install and set up file"
In Setup and Deploy wized it ask for any Dependence file for the application i have attach the Dependence file(.sql) but i am not getting any OutPut .
Is there any Command prompt Utility(SqlServer/VS Commandprompt) ?