Here is my code:
protected void SaveMyImage_Click(object sender, EventArgs e)
{
string imageUrl = Hidden1.Value;
string saveLocation = Server.MapPath("~/PictureUploads/whatever2.png") ;
[Code]....
The top imageUrl declartion is taking in a Base64 image string, and I want to convert it into an image. I think my set of code only works for images like "www.mysite.com/test.jpg" not for a Base64 string.
When I am featching binary images from database and displaying in datalist on asp .net image cotrol. The image display getting too much time. When I click on next button also I take too much time for display next image.
View 1 RepliesSo, I am working on a demo web dashboard. Previously, I had been using Session to store settings about the dashboard, but I would like to move it to a more persistent means of saving settings.It seems to me that using cookies would be my best bet. I'm not entirely positive I have the time to work everything out for writing to/from a database properly.That being said, I might be in over my head on some assumptions I had made about the similarities between Session and Cookies. Currently, I have some code like this:
public Dictionary<string, RadPageViewSetting> PageViewStates
{
get
[code]...
Here's what I have in my ASPX file:
<form id="form1" runat="server">
<table border="1" width="100%">
<tr><td>Firstname</td><td>Lastname</td></tr>
<tr><td><%=Request.Querystring("fname")%></td></tr>
</table>
</form>
Here's what I have in my aspx.vb file:
Imports System.IO
Partial Public Class MyexcelPage
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Response.Clear()
Response.Buffer = True
Response.ContentType = "application/vnd.ms-excel"
Dim stringWriter As StringWriter = New StringWriter()
Dim htmlTextWriter As HtmlTextWriter = New HtmlTextWriter(stringWriter)
Me.RenderControl(htmlTextWriter)
Not sure what to do after this or if the above will do anything.
We have a scenario where we would like to allow our users to upload images to the site. We are running on ASP.Net. A quick search did not result in anything good. It would be great if the control is free/open source but we do not mind paying a little bit.
View 1 RepliesI'm having trouble getting a form working with MVC2. As soon as I change the form element to use 'enctype="multipart/form-data"' I get errors when submitting it. The code I've got creating the form is as follows:
[Code]....
With several form text field and a file upload being the only fields. Nothing too complicated!The action method that handles the form submission is as follows:
[Code]....
It's nothing too complicated either. The code that I've commented out would have inserted the image into the database, but I commented it out to see if it was causing the problem, but it's not.The error I'm getting is as follows:
Server Error in '/' Application.
Invalid character in a Base-64 string.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.FormatException: Invalid character in a Base-64 string.Source Error: [Code]....
Stack Trace: [Code]....
Version Information: Microsoft .NET Framework Version:2.0.50727.4927; ASP.NET Version:2.0.50727.4927
Obviously something is going terribly wrong here, but I'm at a complete loss as to what it is. The form works fine if I get rid of the multipart bit in the form element, but then of course it doesn't upload the image. I also get the error regardless of whether I've actually selected an image to upload, so it's not the actual image causing the error.
I found this code on this site in another thread and tried it. I am passing a string of a web url such as [URL] .... and it gives me this error. How can I pass in the URL without this error?
Code:
Private Sub saveURLToImage(ByVal url As String)
If Not String.IsNullOrEmpty(url) Then
Dim content As String = ""
Dim webRequest__1 As System.Net.WebRequest = WebRequest.Create(url)
Dim webResponse As System.Net.WebResponse = webRequest__1.GetResponse()
[Code] ....
I am using a viewstate to store the company Ids and splitting at hyphen.
protected void onCompanychange(object sender, EventArgs e) {
ViewState["companyID"] += companydropdown.SelectedValue + "-";
String companyids = ViewState["companyID"].ToString();
string pattern = "-";
company_array = Regex.Split(companyids, pattern);
company_length = company_array.Length;
}
Company array is a string array where i have stored the company ids
the problem is company_array[0] has the initial value of the dropdownlist(company) --select company which is why m getting the error(cannot convert data type nvarchar to int) . I have used the same logic in many places in my project it did not give any error.
int count = 0;
company_length = company_length - 1;
while (count < GridView3.Rows.Count && compid_counter < company_length ) {
cmd = new SqlCommand("insertWorkDetais", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@trainerId",trainerID);
[Code] .....
My application is very big one. I m getting this error. I dont know where it is throwing.
I m unable to find this error. Can anyone help me and tell me the scenarios when will this exception comes.
The Stack Trace is throwing this message
System.Convert.FromBase64String(String s) at System.Web.UI.ObjectStateFormatter.Deserialize(String inputString) at System.Web.UI.ObjectStateFormatter.System.Web.UI.IStateFormatter.Deserialize(String serializedState) at System.Web.UI.Util.DeserializeWithAssert(IStateFormatter
formatter, String serializedState) at System.Web.UI.HiddenFieldPageStatePersister.Load()
i'm having a hard time figuring the way on converting my string into an integer number.In my form I have a textbox control from which I get the selected date as string, using the substring method I divide it to month, day and year.The problem is that I cannot, for example, convert the following "12" into the actual integer number twelve. I tried using Int32.Parse or Convert.ToInt32 but still couldn't solve it.Here's my code behind for better comprehension (this doesn't do the trick):
[Code]....
How can I show a saved picturs from data base into a Image control? And how can I save an Image from my web page into data base?
View 10 Repliesthere is eny way to convert a string type to uniqueidentifier type .... when i insert or update data , i can give string as a parameter or i must to convert to uniqueidentifier type.?
View 4 RepliesI am trying to figure out the best way to convert a string object into a DateTime with only using the year. I have something like:
[Code]....
But it is still giving a "String was not a recognized as a valid DateTime." In the full context, I have a webpage with a formview on it and within the formview is a TextBox control that is taking a user input such as "1999" then an ObjectDataSource picks it up and runs it through a BLL. And within the BLL is where I am trying to convert it before it gets inserted into the database.
I am trying to upload a file to the database using the File Upload control. The database column is of type "text"
In the Insert command, I tried to retrieve the file and pass, but as it is a byte array, I am not able to save the data.
[Code]....
How to convert the byte array to string?
I have a third party tool that creates an img tag through code using HtmlTextWriter's RenderBeginTag, RenderEndTag & AddAttribute methods. I want to get the resulting HTML into a string.
I tried the reflection method mentioned here but I get a error "Unable to cast object of type 'System.Web.HttpWriter' to type 'System.IO.StringWriter". The InnerWriter type of the HtmlTextWriter is of type HttpWriter.
how to copy the output HTML into a string?
Addition: code from third party control
[code]....
I am looking for a way to design a simple HTML file, and in runtime - to load it as string to the c#.
I am trying to File.Open it, but it resides in a different location than the binary code.
is there a simple way to tell the build process to load it into a string?
I have an AJAX service where I'm pulling HTML content. I want to Response.Write() it to the browser as a string. I can't figure out how to do it so it remains a string like this rather than formatting the HTML:
<div id="global_nav">
<ul>
<li class="left"><a class="sub practice" href="/practice-time"><span>Practice Time</span>.
I've tried using HTTPUtility.HTMLDecode(string), but that doesn't appear to do anything.
I have a query that converts my string value I have stored in the database (nchar(8)). I have a stored procedure that gets the value and converts to date and when I run the select part of my stored proc to test it it successfully returns the mm/dd/yy format that I want: ex: 02/28/2010 However when I call this stored proc from my program I am getting an exception:
<Exception> Conversion failed when converting datetime from character string.
</Exception> Puzzled why the query works fine but .net gives me an exception? does anyone know how to solve this?
The part of my query that does this conversion is:
[Code]....
im getting an error converting this IP to string
[Code]....
{
I have a maskededit extender
Code:
TargetControlID="dateTextBox"
Mask="99/99/9999 99:99"
MessageValidatorTip="true"
OnFocusCssClass="MaskedEditFocus"
OnInvalidCssClass="MaskedEditError"
MaskType="DateTime"
[Code] ....
So the input format looks like this 12/23/2012 12:12 AM
And I would like to convert this as datetime so i tried to do
Code:
Dim ab As DateTime
ab = DateTime.Parse(dateTextBox.Text)
But it's showing me an error
Code:
at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
at System.DateTime.Parse(String s)
at admin_trackadd.saveButton_Click(Object sender, EventArgs e)
I'm new to ASP and I was wondering if there is a way to save the source of the web-page into a string variable or a .txt file given a website address using C# or ASP.net with C#.
View 5 RepliesI have created a new folder on my website called CanadaPost. I have check with my shared hosting service and they have told me that I have read and write access on the folder - CanadaPost
I have the following code....right now my program gets hung up (no error message) on the line TextWriter tw = new StreamWriter("~/CanadaPost/" + CartId + ."txt", false);
What would be the correct way of writing a string out to a text file?
[Code]....
i'm developing a website. i have a registration form where user can registered with this website. this have a birthdate field for store user's birthdate.that is a textbox. here is my code.
[Code]....
I have this example and it gives me exception "Conversion from string x to dateTime is invalid"
here is my method to validate Datetime.
Example Date string : "27/03/1985"
Public Function validateDateColumn(ByRef FieldName As String) As Boolean
Try
If IsDate(FieldName) Then
Dim actualDate As DateTime = CDate(FieldName)
Dim DtLicExp As DateTime = CDate(actualDate.ToString("d", Thread.CurrentThread.CurrentCulture))
FieldName = DtLicExp.ToString("MM/dd/yyyy")
Return True
End If
Catch ex As Exception
'FieldName &= "Format must be MM/dd/yyyy"
Return False
End Try
End Function
validate this date string formate to datetime.
I want to convert this date "27/03/1985" to datetime.
I need to convert the contents of a Textbox (which is currency) to a datatype float.
Would I convert to single?
txtPurchItemCorrectPrice.Text.Trim();