I am novice to IT field. Recently, in my project I have to capture user details, which includes user picture. I am storing inputs in the datatable. I have defined picture column as image type. I am not be able to get through this. FYI: I have tried using XMLSerialisation
View 2 RepliesI was reading: [URL]
But I have give a compilation error:
CS0246: The type or namespace name 'DataTable' could not be found (are you missing a using directive or an assembly reference?
how can i store image into database and view it in grid view?
View 3 RepliesHow can i add same fields for columns in a datatable. I wan to make a datatable which repeate column name of same type multiple times, but dot net dont allow me to add that, but i want to do that hw can i do that?
table.Columns.Add("S.NO", typeof(int));
table.Columns.Add("DC", typeof(string));
table.Columns.Add("DC", typeof(string));
table.Columns.Add("DC", typeof(string));
table.Columns.Add("ST", typeof(string));
table.Columns.Add("ST", typeof(string));
table.Columns.Add("AD", typeof(string));
table.Columns.Add("AD", typeof(string));
what is wrong with this syntax datatable temp = (DataTable)du.Rows[0]["NAME"] I get the error message Unable to cast object of type 'System.String' to type 'System.Data.DataTable'.
View 6 RepliesIs something like the below possible?
public static T Sum<T>(this DataTable dt, string columnName)
where T : IEnumerable<decimal>, IComparable<decimal>[code]....
It feels like i'm almost there, but not quite :/
Just trying to sum up either decimal or int values in a column in datatable. Currently getting a compile error, however think this is due to the incorrect generic constraint.
How to display images in gridview using datatable (without database) in asp.net
View 1 RepliesI am currently implementing a client-side paging solution using ASP.NET, jQuery and JSON.
I have been following the excellent article from encosia: http://encosia.com/2008/08/20/easily-build-powerful-client-side-ajax-paging-using-jquery/
In my Web Method I retrieve my data from the database as a DataTable:
DataTable categoryProducts = ProductViewerAccess.GetCategoryProducts
("AA", 4, 0, Page.ToString(), out howManyPages, "FALSE", 0, "CostPrice", "asc", destinationList);
I then retrieve the data from the DataTable into an anonymous type:
var feeds =
from feed in categoryProducts.AsEnumerable()[code]....
This all works great.
However, I would like to extend the code to perform some evaluation checks (e.g., check that various columns in the DataTable are not NULL) and other pre-processing (e.g., call various functions to build the image URL based on the image ID - which is another column in the DataTable not shown in the code fragment) before I return the resulting rows of the DataTable as an anonymous type to the client-side.Basically, I want to iterate through the DataTable, perform the evaluation checks and pre-processing, while building my anonymous type manually as I go. Or maybe there is a better way to achieve this?
'DataTable' is an ambiguous reference between 'System.Data.DataTable' and 'Microsoft.Office.Interop.Word.DataTable'
View 3 RepliesI have a datatable for which i'm defining a dataadapter. I'm specifying an updatecommand with sqlparameters for the dataadapter I set the updatecommand's parameters using the following overload:
[Code]....
The length 16 is used because this is the length of the field according to sql (the image datafield is a pointer of size 16) I noticed .Net is actually truncating the string because of the length i'm setting. An image of size 3kb will properly upload if we set the length field to be greater than 3kb The question I have is what is the proper value (or strategy) to use in order to set for the length field so that ALL images will properly update to the database, with each using the appropriate size.
I guess i could theoretically set the length to be maxint, but this seems sloppy. Looking at sqlparameter documentation i didnt see an 'unlimited' or 'default' length i could set, which would allow each update statement called to use the appropriate size for the data length for that row.
WMF files look ok in some browsers but don't display in others, any code out there to convert them to something that will display, jpg, gif, png etc
View 3 RepliesI am currently developing an iPhone app that will work as a security check-in system for events at a church. The main goal is to be able to search a pre existing MS SQL database for a participant, and then save them to a list on the iPhone/iPod Touch/iPad. Easy enough. One of the fields in the MS SQL database is of Image data type, and its function is to store the participant's image in binary form. I currently am not allowed to switch to varbinary(MAX). From the iPhone, I use:
UIImage *image = [UIImage imageNamed:@"nameOfImage.jpg"];
NSData *imageData = UIImageJPEGRepresentation(image,1.0);
NSString *imageString = (NSString *)[[[NSString alloc] init] base64StringFromData:(NSData *)imageData];
You may be wondering what the base64StringFromData is. It's a category discussed here, Any base64 library on iphone-sdk? In the category, it returns a string as NSASCIIStringEncoding. I then send that string to a Visual Basic web service using POST. Assume in the following that I have already set up and opened my SQL connection, and initlialized a SQL Data adapter and command. So the function looks similar to this:
Public Function sendCommand(ByVal image As String) As String
Dim commandString As String
commandString = "insert into phoneApp(image) values(@image)"
Dim encoding As New System.Text.UTF8Encoding
sqlDataAdapter.InsertCommand = (commandString, sqlConnection)
sqlDataAdapter.InsertCommand.Parameters.Add(@"image", SqlDbType.Image, image.length).Value = encoding.GetBytes(image)
sqlDataAdapter.ExecuteNonQuery()
End Function
Now, finally, here's what is happening. In another function, I call Response.BinaryWrite(SqlDataReader.Item("image")). In Internet Explorer, doing this would then make the image appear in the browser. Instead, it displays the string in base64 form. Copy and pasting that string in a base64 converter off the net, and it works. So the encoding on the iPhone did encode to base64 properly. Here's the question. Do I even need to be encoding to base64 to save into Image Data Type, or should I be focusing on learning how to encode the NSData into a different binary string?
app would be in asp.net and c# (4.0)
View 3 RepliesIn my database table i have coulmn with image data type.what should i put there? location of the image ? how do i retrieve the image later? as usual other data type?
View 3 Repliesi am using file upload, i wanted to restrict the files showing in the dialog box to images only. That is 'Files of Type' in the dialog box should be .jpg,.jpeg,.gif,.bmp,.png
View 4 Repliesdatabase type field BLOB in oracle but if i use MS SQL and field type as image then this below line code work fine.
here trying to save image in oracle database but system giving me below line error
unimplemented or unreasonable conversion requested
here is my code
[Code]....
I am trying to streamline the look of my site and I was wondering if there was a way to use the onclick of an image to open up a <input type="file.../>? I want the input to be invisible so it doesn't add clutter to the interface. Here is ultimatly the flow I would ideally have... Image click -> Javascript calls input open. User clicks "open" in the dialog, Input calls some Javascript that calls the click event of the inviable "upload" button. Boom. User clicks image, selects a new one, and I have it automatically on my server without the need for two more buttons... Anyone know if these types of events/functions exists and if so what they are called and how to capture them? Or should I stop making this over complicated and use the method that I know works?
View 6 Replieswhy does my Image Button Type for EDIT in CommandField causes postback on my page? But when i try to change the CommandField type to LINK ( <asp:CommandField ShowEditButton="True" EditImageUrl="~/resources/images/img-icon-edit.png"/ >)
<asp:CommandField ShowEditButton="True"
My table contains a column named visitorimage with image as the datatype. I have a stored procedure to insert an image but whenever I try to create the sp an error occurs saying"Operand type clash: nvarchar is incompatible with image". What's the problem and how to fix this?
ALTER PROCEDURE [dbo].[usp_addvisitor] @lastname nvarchar(50), @firstname nvarchar(50), @visitorimage image, @gender char(6), @personalid nvarchar(50), @vehicleno nvarchar(20), @company nvarchar(50), @represent nvarchar(100), @phonenumber bigint, @mobilenumber
bigint, @address nvarchar(100), @remarks nvarchar(200) AS INSERT INTO tblVisitor VALUES (@lastname, @firstname, @visitorimage, @gender, @personalid, @vehicleno, @company, @represent, @phonenumber, @mobilenumber, @address, @remarks)
I'm going to design a database for an image gallery in ASP.NET Web App . Because of some reasons I've decided to store the image in Data Base , Not the address .
In the application i need two or more different size and weight image for each image that the admin insert .For instance , One of them is small and lightweight thumbnail , and the other is Original big one .
My question is : Should i have two column ( one for lightweight and small thumbnail and one for big and full size one ) in DataBase Or Is there any way i could load different size and wight image from Big and original image column ?
i have the dataset with one table.Table contains three column like 'Name','Location','Pin'.I would like to move the data from another table based on schema.
View 2 RepliesIf I am passed a datatable and I cant change the column structure..is there anyway to set an existing column to a Primary key so I can easily Find() the row I am looking for?
View 1 Repliesim trying to copying specific record from one datatable to another datatable i used below code
public System.Data.DataTable selectspecificdatarow(System.Data.DataTable dtg, int count, int startindex)
{
System.Data.DataTable dtn = dtg.Clone();
for (int i =startindex; i < count; i++)
[Code]....
its taking too long time in cloneing is there any better way to do this task which is Time effecent
how to join two datatable datas into one datatable to show in one gridview
i.e in 1 datatable i have username and pwd and in another datatable i have that user details. how to show all these in one datatable to get those values display in gridview(asp.net)
I'm making a temporary Shopping Cart that moves all the items from the Shopping Cart to PayPal's Secure Online Shopping Cart. They require a <FORM> tag WITHOUT the Runat="server" and they require an INPUT Type="Hidden" variables AND INPUT Type="Image". I have been able to transfer items successfully with this using a Repeater Control to fill the HIDDEN variables. HOWEVER, at the same time that the variables are being transferred to a different page (PayPal's page).
I need to delete the items from my Shopping Cart (I.E. Delete them from a database), and the only way I can think of doing this is using a Standard ASP:Button with code in VBScript to delete the items from the database. When I try to use the Onclick event to access VB Code in the INPUT Type=Image, it does not work. Is there a way to use the INPUT Type=Image button to access VB Code or is there a way to send HIDDEN variables to another page using VBScript?