I have implemented the code below, all headers and data are added without any problem. If he wants to block the possibility of editing individual fields or columns in the excel file that is downloaded by the user, then there is a problem, because nothing is blocked
i use for freeze columns/rows, but when i export file and i open file i can edit any fields
worksheet.SheetView.Freeze(1,3);
[HttpGet]
public IActionResult ExportAsExcel()
{
IEnumerable<Employee> employees = this.repo.GetAll<Employee>();
List<EmployeeDTO> employeeDTO = this._mapper.Map<List<EmployeeDTO>>(employees);
using (var workbook = new XLWorkbook())
{
var woorksheet = workbook.Worksheets.Add("Sheet1");
var currentRow = 1;
woorksheet.Cell(currentRow, 1).Value = "ID";
woorksheet.Cell(currentRow, 2).Value = "name";
foreach (var empDtos in employeeDTO)
{
currentRow++;
woorksheet.Cell(currentRow, 1).Value = empDtos.EmployeeId;
woorksheet.Cell(currentRow, 2).Value = empDtos.Name;
}
using (var stream = new MemoryStream())
{
workbook.SaveAs(stream);
var content = stream.ToArray();
return File(
content,
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"Employee.xlsx"
);
}
}
}
I get this error when running this code. I have looked for solution though I don't like the idea of using MARS as people have suggested as it may contain a lot of data, is there any other option here? Also can I edit a variable in a database without rewriting all of them as I do here, will this save server power or make no difference?
There is already an open DataReader associated with this Command which must be closed first.
public ActionResult CheckLinks(Link model)
{
var userId = User.Identity.GetUserId();
var UserTableID = db.UserTables.Where(c => c.ApplicationUserId == userId).First().ID;
foreach (var item in db.Links.Where(p => p.UserTable.ID == UserTableID))
{
string pageContent = null;
HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(item.Obdomain);
HttpWebResponse myres = (HttpWebResponse)myReq.GetResponse();
using (StreamReader sr = new StreamReader(myres.GetResponseStream()))
{
pageContent = sr.ReadToEnd();
}
string live = "";
if (pageContent.Contains(item.Obpage))
{
live = "Yes";
}
else { live = "No"; }
var link = new Link { Obdomain = item.Obdomain, ClientID = item.ClientID, Obpage = item.Obpage, BuildDate = item.BuildDate, Anchor = item.Anchor, IdentifierID = item.IdentifierID, live = (Link.Live)Enum.Parse(typeof(Link.Live), live), UserTableID = item.UserTableID };
db.Entry(link).State = EntityState.Modified;
db.SaveChanges();
}
return RedirectToAction("Index");
}
Entity Framework allows only one active command per context at a time. You should add .ToList() at the end of the following statement:
db.Links.Where(p => p.UserTable.ID == UserTableID).ToList();
So your code could look like this:
var items = db.Links.Where(p => p.UserTable.ID == UserTableID).ToList();
foreach (var item in items)
i created a form dynamically by adding each component in action script,
now i want to get back the text/data entered in to that each component dynamically?
private function loadAllComponents():void
{
var formItemArray:Array = new Array();
for(var i:int=0; i< Application.application.designList.length; i++)//which had the colonName, colComponet to be dispalyed,
{
var fm:FormItem = new FormItem();
fm.label = Application.application.designList.getItemAt(i).colName;
var comp:String = Application.application.designList.getItemAt(i).component;
switch(comp)
{
case "TextBox":
var ti:TextInput = new TextInput();
ti.id = Application.application.designList.getItemAt(i).component;
fm.addChild(ti);
break;
case "TextArea":
var ta:TextArea = new TextArea();
ta.id = Application.application.designList.getItemAt(i).colName;
fm.addChild(ta);
break;
case "ComboBox":
var mycb:myComboBox = new myComboBox();
mycb.getAllMasterCBData(Application.application.selectedgridItem, Application.application.designList.getItemAt(i).colName);
fm.addChild(mycb);
break;
case "DateField":
var df:DateField = new DateField();
df.id = Application.application.designList.getItemAt(i).component;
fm.addChild(df);
break;
}
myform.addChild(fm);
}
}
private function saveToDb():void // Here i wan to read all the formdata
{
var formItems:Array = myform.getChildren();
for each (var item:UIComponent in formItems)
{
if (item is TextInput)
{
var text:String = Object(item).text;
Alert.show("came here");
}
else if (item is DateField)
{
var date:Date = DateField(item).selectedDate;
}
}
}
]]>
</mx:Script>
<mx:Form id="myform" cornerRadius="5" borderColor="#B7BABC" borderStyle="solid" width="100%" height="100%" />
<mx:HBox width="100%" height="100%" >
<mx:Spacer width="120"/>
<mx:Button label=" Save " id="saveBtn" click="saveToDb()" />
</mx:HBox>
You're creating the input components in ActionScript, but based on this code you are not creating them dynamically; you're just hard coding them. With your given sample, you'll know the components you are creating at compile time.
You'll need to store a reference to the form items you create; make them public variables instead of 'var' local variables. Kind of like this:
protected var ti:TextInput ;
protected var ta:TextArea ;
protected var df:DateField;
Then in your creation method, do something like this:
ti = new TextInput();
ti.id = Application.application.designList.getItemAt(i).component;
fm.addChild(ti);
ta = new TextArea();
ta.id = Application.application.designList.getItemAt(i).colName;
fm.addChild(ta);
df = new DateField();
df.id = Application.application.designList.getItemAt(i).component;
fm.addChild(df);
myform.addChild(fm);
Then when you need to access them, just do something like this:
private function getMyformData()
{
ti.text;
ta.text;
}
If you're generating the form components at run time based on data, then store then form elements in an array of some sort.
You could also work something out by looping over all children of your container, although that wouldn't be my first approach.
Since poster posted more complete code; here are some additions. I added the protected array of all form items and in each 'switch' block; the new input element is pushed onto the array.
<mx:Script>
protected var itemsArray : Array = new Array();
private function loadAllComponents():void
{
var formItemArray:Array = new Array();
for(var i:int=0; i< Application.application.designList.length; i++)//which had the colonName, colComponet to be dispalyed,
{
var fm:FormItem = new FormItem();
fm.label = Application.application.designList.getItemAt(i).colName;
var comp:String = Application.application.designList.getItemAt(i).component;
switch(comp)
{
case "TextBox":
var ti:TextInput = new TextInput();
ti.id = Application.application.designList.getItemAt(i).component;
fm.addChild(ti);
itemsArray.push(ti)
break;
case "TextArea":
var ta:TextArea = new TextArea();
ta.id = Application.application.designList.getItemAt(i).colName;
fm.addChild(ta);
itemsArray.push(ta)
break;
case "ComboBox":
var mycb:myComboBox = new myComboBox();
mycb.getAllMasterCBData(Application.application.selectedgridItem, Application.application.designList.getItemAt(i).colName);
fm.addChild(mycb);
itemsArray.push(mycb)
break;
case "DateField":
var df:DateField = new DateField();
df.id = Application.application.designList.getItemAt(i).component;
fm.addChild(df);
itemsArray.push(df)
break;
}
myform.addChild(fm);
}
}
The sateToDb method will change to be something like this:
private function saveToDb():void // Here i wan to read all the formdata
{
var formItems:Array = myform.getChildren();
for each (var item:UIComponent in itemsArray )
{
if (item is TextInput)
{
var text:String = Object(item).text;
Alert.show("came here");
}
else if (item is DateField)
{
var date:Date = DateField(item).selectedDate;
}
}
}
]]>
</mx:Script>
Edited Response:
OK, I think I see the issue.
You're adding your data controls to FormItems and adding those to the Form. But then you're iterating over the Form's children and as if they were the data controls and not FormItems.
Without commenting on the rest of the code, have a look at what this updated function is doing to retrieve the data controls:
private function saveToDb():void
{
var formItems:Array = myform.getChildren();
for each (var item:FormItem in formItems)
{
var itemChildren:Array = item.getChildren();
for each (var control:UIComponent in itemChildren)
{
if (control is TextInput)
{
var text:String = Object(item).text;
Alert.show("TextInput");
}
else if (control is DateField)
{
var date:Date = DateField(item).selectedDate;
Alert.show("Date");
}
}
}
You can delete the formItemArray variable too, it's not needed since we're getting the list of children from the Form and FormItems.
Original response:
If you keep a reference to each of the dynamic form items in an Array you can iterate over each of them in your getMyFormData() function.
e.g.
protected var formItems:Array = new Array();
// Other class stuff here...
var ti:TextInput = new TextInput();
ti.id = Application.application.designList.getItemAt(i).component;
formItems.push(ti); // Add item to array.
fm.addChild(ti);
var ta:TextArea = new TextArea();
ta.id = Application.application.designList.getItemAt(i).colName;
formItems.push(ta); // Add item to array.
fm.addChild(ta);
var df:DateField = new DateField();
df.id = Application.application.designList.getItemAt(i).component;
formItems.push(df); // Add item to array.
fm.addChild(df);
myform.addChild(fm);
<mx:button click="getMyformData()"/>
private function getMyformData()
{
//How to get the myform Data dynamically here after validations... ? &
for each (var item:UIComponent in formItems)
{
if (item is TextInput || item is TextArea)
{
// Cast to Object to access the 'text' property without the compiler complaining.
var text:String = Object(item).text;
// Do something with the text...
}
else if (item is DateField)
{
var date:Date = DateField(item).selectedDate;
// Do something with the date...
}
// Insert additional type checks as needed.
}
}
You'll have to work out what to do with the data on your own though :)
If you are using a separate list make sure you clear out the formItems array when you're done with it so you don't have references to the items keeping them in memory unnecessarily.
Instead of keeping a separate array of form items you could also iterate over the children in the fm container. You might have to make some assumptions about the children you'd be accessing but it looks like you have control over all of the children being added so that's no problem.
I hope that helps...
:)
IN .NET 3.5 I know of the System.ServiceModel.Syndication classes which can create Atom 1.0 and RSS 2.0 rss feeds. Does anyone know of a way to easily generate yahoo's Media RSS in ASP.Net? I am looking for a free and fast way to generate an MRSS feed.
Here a simplified solution I ended up using within a HttpHandler (ashx):
public void GenerateRss(HttpContext context, IEnumerable<Media> medias)
{
context.Response.ContentType = "application/rss+xml";
XNamespace media = "http://search.yahoo.com/mrss";
List<Media> videos2xml = medias.ToList();
XDocument rss = new XDocument(
new XElement("rss", new XAttribute("version", "2.0"),
new XElement("channel",
new XElement("title", ""),
new XElement("link", ""),
new XElement("description", ""),
new XElement("language", ""),
new XElement("pubDate", DateTime.Now.ToString("r")),
new XElement("generator", "XLinq"),
from v in videos2xml
select new XElement("item",
new XElement("title", v.Title.Trim()),
new XElement("link", "",
new XAttribute("rel", "alternate"),
new XAttribute("type", "text/html"),
new XAttribute("href", String.Format("/Details.aspx?vid={0}", v.ID))),
new XElement("id", NotNull(v.ID)),
new XElement("pubDate", v.PublishDate.Value.ToLongDateString()),
new XElement("description",
new XCData(String.Format("<a href='/Details.aspx?vid={1}'> <img src='/Images/ThumbnailHandler.ashx?vid={1}' align='left' width='120' height='90' style='border: 2px solid #B9D3FE;'/></a><p>{0}</p>", v.Description, v.ID))),
new XElement("author", NotNull(v.Owner)),
new XElement("link",
new XAttribute("rel", "enclosure"),
new XAttribute("href", String.Format("/Details.aspx?vid={0}", v.ID)),
new XAttribute("type", "video/wmv")),
new XElement(XName.Get("title", "http://search.yahoo.com/mrss"), v.Title.Trim()),
new XElement(XName.Get("thumbnail", "http://search.yahoo.com/mrss"), "",
new XAttribute("url", String.Format("/Images/ThumbnailHandler.ashx?vid={0}", v.ID)),
new XAttribute("width", "320"),
new XAttribute("height", "240")),
new XElement(XName.Get("content", "http://search.yahoo.com/mrss"), "a",
new XAttribute("url", String.Format("/Details.aspx?vid={0}", v.ID)),
new XAttribute("fileSize", Default(v.FileSize)),
new XAttribute("type", "video/wmv"),
new XAttribute("height", Default(v.Height)),
new XAttribute("width", Default(v.Width))
)
)
)
)
);
using (XmlWriter writer = new XmlTextWriter(context.Response.OutputStream, Encoding.UTF8))
{
try
{
rss.WriteTo(writer);
}
catch (Exception ex)
{
Log.LogError("VideoRss", "GenerateRss", ex);
}
}
}
Step 1: Convert your data into XML:
So, given a List photos:
var photoXml = new XElement("photos",
new XElement("album",
new XAttribute("albumId", albumId),
new XAttribute("albumName", albumName),
new XAttribute("modified", DateTime.Now.ToUniversalTime().ToString("r")),
from p in photos
select
new XElement("photo",
new XElement("id", p.PhotoID),
new XElement("caption", p.Caption),
new XElement("tags", p.StringTags),
new XElement("albumId", p.AlbumID),
new XElement("albumName", p.AlbumName)
) // Close element photo
) // Close element album
);// Close element photos
Step 2: Run the XML through some XSLT:
Then using something like the following, run that through some XSLT, where xslPath is the path to your XSLT, current is the current HttpContext:
var xt = new XslCompiledTransform();
xt.Load(xslPath);
var ms = new MemoryStream();
if (null != current){
var xslArgs = new XsltArgumentList();
var xh = new XslHelpers(current);
xslArgs.AddExtensionObject("urn:xh", xh);
xt.Transform(photoXml.CreateNavigator(), xslArgs, ms);
} else {
xt.Transform(photoXml.CreateNavigator(), null, ms);
}
// Set the position to the beginning of the stream.
ms.Seek(0, SeekOrigin.Begin);
// Read the bytes from the stream.
var byteArray = new byte[ms.Length];
ms.Read(byteArray, 0, byteArray.Length);
// Decode the byte array into a char array
var uniEncoding = new UTF8Encoding();
var charArray = new char[uniEncoding.GetCharCount(
byteArray, 0, byteArray.Length)];
uniEncoding.GetDecoder().GetChars(
byteArray, 0, byteArray.Length, charArray, 0);
var sb = new StringBuilder();
sb.Append(charArray);
// Returns the XML as a string
return sb.ToString();
I have those two bits of code sitting in one method "BuildPhotoStream".
The class "XslHelpers" contains the following:
public class XslHelpers{
private readonly HttpContext current;
public XslHelpers(HttpContext currentContext){
current = currentContext;
}
public String ConvertDateTo822(string dateTime){
DateTime original = DateTime.Parse(dateTime);
return original.ToUniversalTime()
.ToString("ddd, dd MMM yyyy HH:mm:ss G\"M\"T");
}
public String ServerName(){
return current.Request.ServerVariables["Server_Name"];
}
}
This basically provides me with some nice formatting of dates that XSLT doens't give me.
Step 3: Render the resulting XML back to the client application:
"BuildPhotoStream" is called by "RenderHelpers.Photos" and "RenderHelpers.LatestPhotos", which are responsible for getting the photo details from the Linq2Sql objects, and they are called from an empty aspx page (I know now that this should really be an ASHX handler, I've just not gotten around to fixing it):
protected void Page_Load(object sender, EventArgs e)
{
Response.ContentType = "application/rss+xml";
ResponseEncoding = "UTF-8";
if (!string.IsNullOrEmpty(Request.QueryString["AlbumID"]))
{
Controls.Add(new LiteralControl(RenderHelpers
.Photos(Server.MapPath("/xsl/rssPhotos.xslt"), Context)));
}
else
{
Controls.Add(new LiteralControl(RenderHelpers
.LatestPhotos(Server.MapPath("/xsl/rssLatestPhotos.xslt"), Context)));
}
}
At the end of all that, I end up with this:
http://www.doodle.co.uk/Albums/Rss.aspx?AlbumID=61
Which worked in Cooliris/PicLens when I set it up, however now seems to render the images in the reflection plane, and when you click on them, but not in the wall view :(
In case you missed it above, the XSLT can be found here:
http://www.doodle.co.uk/xsl/rssPhotos.xslt
You'll obviously need to edit it to suit your needs (and open it in something like Visual Studio - FF hides most of the stylesheet def, including xmlns:atom="http://www.w3.org/2005/Atom" xmlns:media="http://search.yahoo.com/mrss").
I was able to add the media namespace to the rss tag by doing the following:
XmlDocument feedDoc = new XmlDocument();
feedDoc.Load(new StringReader(xmlText));
XmlNode rssNode = feedDoc.DocumentElement;
// You cant directly set the attribute to anything other then then next line. So you have to set the attribute value on a seperate line.
XmlAttribute mediaAttribute = feedDoc.CreateAttribute("xmlns", "media", "http://www.w3.org/2000/xmlns/");
mediaAttribute.Value = "http://search.yahoo.com/mrss/";
rssNode.Attributes.Append(mediaAttribute);
return feedDoc.OuterXml;
Just to add another option for future reference:
I created a library that leverages the SyndicationFeed classes in .NET and allows you to read and write media rss feeds.
http://mediarss.codeplex.com
How to find out size of session in ASP.NET from web application?
If you're trying to get the size of Session during runtime rather than in debug tracing, you might want to try something like this:
long totalSessionBytes = 0;
BinaryFormatter b = new BinaryFormatter();
MemoryStream m;
foreach(var obj in Session)
{
m = new MemoryStream();
b.Serialize(m, obj);
totalSessionBytes += m.Length;
}
(Inspired by http://www.codeproject.com/KB/session/exploresessionandcache.aspx)
The code in the answer above kept giving me the same number. Here is the code that finally worked for me:
private void ShowSessionSize()
{
Page.Trace.Write("Session Trace Info");
long totalSessionBytes = 0;
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter b =
new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
System.IO.MemoryStream m;
foreach (string key in Session)
{
var obj = Session[key];
m = new System.IO.MemoryStream();
b.Serialize(m, obj);
totalSessionBytes += m.Length;
Page.Trace.Write(String.Format("{0}: {1:n} kb", key, m.Length / 1024));
}
Page.Trace.Write(String.Format("Total Size of Session Data: {0:n} kb",
totalSessionBytes / 1024));
}
I think you can find that information by adding Trace="true" to the page directive of a aspx page. Then when the page loads you can see a large number of details regarding the page request, including session information i think.
You can also enable tracing in your entire application by adding a line to your web.config file. Something like:
<trace enabled="true" requestLimit="10" pageOutput="true" traceMode="SortByTime"
localOnly="true"/>
This is my code for getting all current Session variables with its size in kB into a Dictionary.
// <KEY, SIZE(kB)>
var dict = new Dictionary<string, decimal>();
BinaryFormatter b = new BinaryFormatter();
MemoryStream m;
foreach(string key in Session.Keys)
{
var obj = Session[key];
if (obj == null)
{
dict.Add(key, -1);
}
else
{
m = new MemoryStream();
b.Serialize(m, obj);
//save the key and size in kB (rounded to two decimals)
dict.Add(key, Math.Round(Convert.ToDecimal(m.Length) / 1024, 2));
}
}
//return dict