Web Forms :: How To Check FileUpload Control Empty Or Not
Oct 5, 2010How to check FileUpload Control Empty or not?
I tried the following code,
But it was not working.
if ((this.FileUploadPanelToExcel !=null ))
How to check FileUpload Control Empty or not?
I tried the following code,
But it was not working.
if ((this.FileUploadPanelToExcel !=null ))
How do I check if an asp:FileUpload control has a file selected in JavaScript?
I've tried .HasFile and .value, both have returned undefined.
I have a sharepoint datetime control named date. Now how can i check whether the the field is empty or not;
i have the following code
if(date.ToString() != "")
{
lbl.Text = "Not Empty";
}
i did not enter any date in that field but the above code is always executed.
it always have the current date.
How can i assgin empty string to selectedDate propert of Sharepoint DateTime Control?
i am uploading a file through file upload control , file size has greater then 4 MB, I have to give the proper alert msg to the user that file size exceeding the limit.how to do it , because at server side it is crashed on the IIS and not return to the server to check the file size validation.that how it is possible to validate the file size and give the proper alert messege
View 3 RepliesI am working on ASP.NET3.5 platform. I have used a file upload control and a asp button to upload a file. Whenever i try to upload a file which contain special characterlike (file#&%.txt) it show crash and give the messeage "Server Error in 'myapplication' Application." A potentially dangerous Request.Files value was detected from the client (filename="...New Text &#.txt"). Description: Request Validation has detected a potentially dangerous client input value, and processing of the request has been aborted. This value may indicate an attempt to compromise the security of your application, such as a cross-site scripting attack. You can disable request validation by setting validateRequest=false in the Page directive or in the configuration section. However, it is strongly recommended that your application explicitly check all inputs in this case.
Exception Details: System.Web.HttpRequestValidationException: A potentially dangerous Request.Files value was detected from the client (filename="...New Text &#.txt"). Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. how can i prevent this crash using javascript at client side?
I have this code, how will I write the code so I can check if a textbox i empty? This way want work. Now it goes in if cellPhone != null all the time.
[Code]....
I think this is something really easy that I am missing. I have a loop that is sending emails. The loop adds an attachement from a FileUpload instance. The first run of the loop is fine but each subsequent run the attachment is empty. I have found mention of reseting contentstream.position to 0 but that doesn't seem to apply to the FileUpload control. I am attaching the code below.
[Code]....
I am making a student registration form. For photo upload i want that when user open registration form then bydefault image should be shown and if user does not upload any image then by default image should be inserted in database but if user upload the image then that image should save in database.
For photo upload i have taken this code
<asp:Image ID="UserImage" runat="server" Width="140px" ImageUrl="~/images/default.gif" />
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="Upload"
CausesValidation="false" onclick="btnUpload_Click" />
I have Fileupload control in my page
1-i want delete the text that is beside of fileupload button text: no file choesn
2-i want change text of file upload button( I want change Choose file text)
how can i check to see if a value in my detailsview is empty? What i have now is not working.
[Code]....
I currently do something like...
[Code]....
Now I know this works.. but what is the right way to have this? I don't want to be checking something twice instead of just having it written out once.
I have set the value of an int parameter to the attribute of a textbox.The textbox can be empty or null, how to check whether the parameter is empty or null?
View 5 RepliesI have a FileUpload control inside of an update panel that I would like to use to do async file uploads. The issue I am having is that during the partial post back, the FileUpload control is empty. I was under the impression that through an update panel doing the full page life cycle that it would pick up the use input.Am I incorrect here? Can this somehow be done or do I need to do the traditional full page post back to get this to work?
View 3 Repliesi'm trying to check for an empty cell in a gridview.
On the RowDataBound event I tried the following:
- if (String.IsNullOrEmpty(e.Row.Cells[2].Text.Trim()))
- if (String.IsNullOrEmpty(e.Row.Cells[2].Text))
- if (e.Row.Cells[2].Text == "")
None of them worked.
I'm using boundfields. I can't use a TemplateField with a label because I need to check for other stuff for that column in the RowDataBound event by doing e.Row.Cells[2].Text - that only works if I use boundfields.
I have a sql view of a table, I need to check whether it is empty, if it is empty, I need to hide a grid, other wise I need to show it.
Is there anything useful for me to check the sqldatasource?
As example:
SqlDataSource1.isitempty();
or such things.
Do I have to use dataset or such things?
I need to validate textbox is not empty if check box is checked.
View 9 RepliesHow to get data (read file) chosen in FileUpload control without FileUpload.SaveAs Method on the server? Is it possible write it at once to some object?
View 2 RepliesI have a FileUpload control in an UpdatePanel and when user select a file, the full file path will will be stored in a hiddenfield, and during postback, i would like to assign the full file path in the hiddenfield back to the FileUpload control textbox, possible to achieve that?
View 1 RepliesI have an array of a server control type, and what I would like to do is check if there any elements set inside the array. How can you check inside if for instance an array has no elements set inside or the array is empty or only one or two?
View 4 RepliesI make SqlDataSource1.DataBind(); with some parameters on button click,
then I'm working with a Grid onDataBound();
but if my SqlDataSource1 returns empty data I've got an error even if I'm trying to check if (GridView2.HeaderRow.Cells.Count != 0) so I guess I need to check it on SqlDataSource1 someway.
how to check var variable is empty
View 3 RepliesIm using "string user = Database.GetMostRecentReply(id).Rows[0][2].ToString();" to get the username from the most recent reply in my forum.
But how do I check if the row is empty? Im using a try catch at the moment, but there must be a better way to do this.
I have on my page a fileUpload control. -
<asp:FileUpload ID="FileUpload1" runat="server" />
and a save button.
When I browse and pick a file and press save the code works fine. However if I manually type rubbish into the fileupload and press save nothing happens.How can I get the save button to work so that I can check what is in the fileupload is a proper and existing file?
How can i check if dataset is emty some thing like follows
if dataset=emty then
msgbox("NO table")
else
....
End if
I am importing excel files from root folder, when file not there then message should apeear to avoid collapsing application.
Code:
ry
Dim strExcelConn As String = System.Configuration.ConfigurationManager.ConnectionStrings.Item("ExcelConnection1").ToString()
Dim dbConn As New OleDbConnection(strExcelConn)
Dim strSQL As String
[code]...
How can i check to see if ViewBag.Data is empty?
View 7 Replies