Convert Object Back To File?
Feb 13, 2010I want to convert an object of System.Byte[] which is actually a file, retrieved from the database, back to file and store the file in a folder. How can we convert it using ASP.Net with C# ?
View 2 RepliesI want to convert an object of System.Byte[] which is actually a file, retrieved from the database, back to file and store the file in a folder. How can we convert it using ASP.Net with C# ?
View 2 RepliesDoes 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 RepliesI have a string I need to convert back to a date. I can call .ToString("yyyyMMdd") and get the string i want. My question is how can I convert that back into a date? I'm trying something like the following with no luck.
DateTime d;
var formatInfo = new DateTimeFormatInfo {ShortDatePattern = "yyyyMMdd"};
if (DateTime.TryParse(details.DetectionTime.Date, formatInfo, DateTimeStyles.None, out d))
{
lit.Text = d.ToShortTimeString(); //would like 07/30/2010 as the text
}
I've never used DateTimeFormatInfo before if that isn't obvious. Can someone point me in the right direction. I know I could probably use substring and create a new DateTime(y, m, d) etc... I'm just wondering since c# interpreted .ToString() correctly, if it can't derive a date from the very same string it output.
I've scenario where I want to insert data into database without post back. there are around 12 to 13 fields which i need to insert. I'm passing DTO from the client side which is actually Json object. Now the problem which i'm facing is how to convert that Json object which i got in webservice to the "class" (in my case class name is User) object.
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In the above case AddNewUser method takes the object of User class. But i'm getting casting error. So how do I convert Json object to the "User" class object?
Is there an easy way to populate my C# Object with the JSON object passed via AJAX?
//This is the JSON Object passed to C# WEBMETHOD from the page using JSON.stringify
{"user":{"name":"asdf","teamname":"b","email":"c","players":["1","2"]}}
//C# WebMetod That receives the JSON Object
[WebMethod]
public static void SaveTeam(Object user)
{
}
//C# Class that represents the object structure of JSON Object passed in to the WebMethod
public class User
{
public string name { get; set; }
public string teamname { get; set; }
public string email { get; set; }
public Array players { get; set; }
}
I have a cascading dropdown. After the dropdown is populated(it is in another file) i would like to return back to the original form where the control is placed. is there anyway of doing it
View 4 RepliesI know it sounds crazy, but yes, I am hoping to convert a site that was developed for 3.5 back to 1.1. In Visual Studio, I can target the output to 2.0, but that's as far back as it goes. I assume there is some way to do this, but I've been up for too long to even begin to think clearly and the only info I can find by searching here or google is for converting from old to new, not the other way around.
View 4 RepliesMy querystring is a long URL to a repository node...is there a way to encrypt it such that it's not humand readable and I can just convert it back in my code behind?
View 1 RepliesI have a dataset stored as a CLOB field in an Oracle table. I want to be able to pull this field out and type it back to a dataset. Is this possible and if so how?
View 1 RepliesI have a primary key in a database that I present to the user.the key is made up in the format SUBJ0001 and needs to increment to SUBJ0002 etc as new entries are made. I have currently presented the user with the last entry and am relying on them to increment this value in a text box. How would i go about incrementint this through code.i could split out the SUBJ part but I cannot convert 0001 to an int and increment and convet back?
View 4 RepliesLots of people recommend to wrap the MVC JsonReturn result in a textarea to play nicely with jquery forms etc.
That part makes sense but how do I get the json object back in my client jquery code?
The client jquery plugin should look something like this:
// Doesn't work since data is "<textarea>{"error":true,"msg":"foo"}
First of all, here comes the load part.
Structure MainStruct
Dim Ans1 As String
Dim Ans2 As String
End Structure [code]....
The question is how can i read back the contents of the list, stored in the Session?
I mean something like...Build = Session("MyData")
What exactly is the e.Row.DataItem return.. MSDN says.. returns An Object that represents the underlying data object to which the GridViewRow object is bound.
Here is my DataGrid...
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="ObjectDataSource1" OnRowDataBound="GridView1_RowDataBound">
<Columns>
<asp:BoundField DataField="PracticeCode" HeaderText="PracticeCode"
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Note : There could be other ways to accomplish this, but I'm looking especially why my p1 is null... and is there any way to get the Patient Object back from GridView after binding.
I have a website written in C# that was running fine on one server. We moved it to another server and have a couple issues. I am mainly a VB.NET coder but can do a few things in C#. This is not a project - it is a website and can open it in VS2008 no problem. This is an admin site for the whole website where the user can add customer comments, etc. When logging in, it works fine. I can go to one of the admin pages after logging in and works. If I go to two other different pages, I get this error:
Object reference not set to an instance of an object.
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It turns out this is in the main.master page and it is used by the other pages that load fine. The ApplicationTitle variable is set right in the web.config file and like I said, it shows on the other pages.
My question is why would this code work fine for some pages and not two others? All of these admin pages are under a folder called Admin and the web.config file is in the root folder of the website. Its almost like these two pages cannot see the web.config file in the root folder? Why would that be if thats the case?
I wonder is it possible to convert a dataset into object and if so how?
View 7 RepliesAttempting to upload a file to a database and was wondering if someone could help me a bit as I've gotten a bit stuck, and there are no errors except when I run the application. The error I get when I run the app is: System.NullReferenceException: Object Referencenot set to an instance of an object. This error occurs on the line:
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If I have a string containing valid JSON
how can I convert to an obect in c#?
how can i convert the particular postquery to my Post object , so it can be added to the list posts .
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I want to select a INT value from a table and return this value. My code looks like this:
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Program is failing on the retVal = reader["nid"];
I can convert it tostring, but this doesn't make sense to me as the column nid is an integer.
I have object graph, of Customer, Contact and Address... I want to convert it to dataset and then convert the dataset to xml. i don't think there is a straight method to convert to dataset or xml, therefore the my approach is the convert the objects to dataset using Reflection.
I am trying to create a GENERIC(used for any object type) function to convert object graph to dataset. but i have hit road block...how do i type cast a generic type cast..refer to the function ObjectToDataTable code marked inRed
my object is as follows
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how to use the xml http object to convert this to ajax. I need to keep this from refreshing everytime I do a postback.
Here is my code
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error cannot convert from 'object' to 'string' The best overloaded method match for 'System.IO.File.Exists(string)' has some invalid arguments
string theUserId = Session["UserID"].ToString();
OdbcConnection cn = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Database=gymwebsite2; User=x; Password=x;");
cn.Open();
OdbcCommand sc = new OdbcCommand(string.Format("SELECT picturepath FROM Pictures WHERE UserID ='{0}'", theUserId), cn);
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I have a list of person objects which I want to send in response to a jquery' ajax request. I want to send the list into JSON format. The list is as follows -
List<Person> PersonList = new List<Person>();
Person Atiq = new Person("Atiq Hasan Mollah", 23, "Whassap Homie");
Person Sajib = new Person("Sajib Mamud", 24, "Chol kheye ashi");
PersonList.Add(Atiq);
PersonList.Add(Sajib);
How can I convert the "PersonList" list into JSON ?
I have a column (data type timestamp) in SQL Server 2008.Now I want to show this timestamp value in ASP.Net C# app as string. Is there any way to do that?I tried it using regular data fetching in ASP.Net but it produced System.byte[] as output rather than actual value. In SQL Server Management Studio values are represented as 0x000000000000B3C0
View 2 Replies I have a GridView and a LinkButton control. I click the LinkButton control and loose the object reference to both objects after post back. I want to be able to get the command arguments from the link button and then be able to get a reference to the gridview control to determine which page index to set the gridview. I have been able to get the __EventTarget property to reference the object that was called but Im not able to reference that object.
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