I have to create a DataGrid with dynamic columns and I want to put an ImageButton in a TemplateColumn. If the DataGrid is NOT DYNAMIC, I put this code on the .aspx page like this : (this first part of code is just to explain, it isn't what I want to do)
[code]...
I got a data like this :
ID
Url
1
c:a.jpg;c:.jpg
when I bind it into gridview, i want it to be like this:
ID
Url
1
a.jpg
in my procedure in code-behind I am trying to create a DataGrid with autoGenerateColumns = true :
DataGrid NewDg = new DataGrid();
NewDg.AutoGenerateColumns = true;
NewDg.Width = Unit.Percentage(100.00);
NewDg.DataSource = ds;
NewDg.DataBind();
I need to also add another column (TemplateColumn maybe) of CheckBoxes to this Grid.Do you know how to do that??
I have tried that:
TemplateColumn t = new TemplateColumn();
CheckBox c = new CheckBox();
t.ItemTemplate = (ITemplate)c;
NewDg.Columns.Add(t);
I get the following exception trace:
System.InvalidCastException: Unable to cast object of type 'System.Web.UI.WebControls.CheckBox' to type 'System.Web.UI.ITemplate'. at Default2.DataGrid1_ItemDataBound(Object sender, DataGridItemEventArgs e) in c:UserssaherDocumentsTreeTestTreeDemoDefault2.aspx.cs:line 116 at System.Web.UI.WebControls.DataGrid.OnItemDataBound(DataGridItemEventArgs e) at System.Web.UI.WebControls.DataGrid.CreateItem(Int32 itemIndex, Int32 dataSourceIndex, ListItemType itemType, Boolean dataBind, Object dataItem, DataGridColumn[] columns, TableRowCollection rows, PagedDataSource pagedDataSource) at System.Web.UI.WebControls.DataGrid.CreateControlHierarchy(Boolean useDataSource) at System.Web.UI.WebControls.BaseDataList.OnDataBinding(EventArgs e) at System.Web.UI.WebControls.BaseDataList.DataBind() at Default2.BindData() in c:UserssaherDocumentsTreeTestTreeDemoDefault2.aspx.cs:line 44
I have the following case, all my controls on an update panel on the page.
one of these controls is a grid view , this grid view contains a check box on the header template field( to make a check all) . the autopostback is true but when the check changed no thing is happen , the update panel has a trigger asynchronous post back for the gridview.
ASCX File:
<asp:datagrid runat="server" id="gridFormFields" datakeyfield="FieldID"
autogeneratecolumns="False"
onitemcommand="gridFormFields_ItemCommand" onitemdatabound="gridFormFields_ItemDataBound">
<columns>
[Code]....
In the code behind, the Control returned by FindControl is null. Why? How can I access the buttonMoveUpFormField and buttonMoveDownFormField controls? From the code behind, is it possible to access controls which are declared in the ItemTemplate section of the TemplateColumn section of a DataGrid?
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hide TemplateColumn HeaderText programatically with c#?
How can I change gridview templatecolumn order dynamically?
View 4 Replies[Code]....
VB.Net
[Code]....
RadioButtonList, Gridview, TemplateColumn, get selected radio value in VB
I have a website on the IIS but it has only the aspx file. Now I need to add the code behind for some pages. How do I go about this?
I've been trying to add the attribute "codebehind" and "autoeventwireup" on the top of the aspx file but no luck (the page_load event is not being called). Also, if I double click on the button from the design view in Visual Studio, it creates the javascript handle (not the server code).
In the past I have always added rows of data by binding the gridview to a sqldatasource control. Is there a way to manually (by code) add rows myself from the VB code? I need to call a stored procedure by code and wrote the results one at a time to the gridview.
View 3 RepliesI am using web services in my applcation. I know when calling webservices the soap is created.
My requirement is to create soap sub header below like using vb.net code. Is it possible?
<SubHeader>
<username>sasi</username>
<password>infot</password>
</SubHeader>
Using the Entity Framework that I generated. I have a Roles table created during the default system AspNetSqlRoleProvider security set-up.In the Roles table, I have an ApplicationId uniqueidentifier column. Which has a guid populated in it, which doesn't change for my application. I need to add a Role manually through my app using the entity framework. However, when creating my Roles object and setting Roles.ApplicationId. It expects a type of Guid. I have the ApplicationId in my web.config app settings. As it shouldn't change. But it is returned at string. I cannot type cast the value either to use in Roles.ApplicationId. What can I do to use my current ApplicationId value when trying to create a new role manually using the EF?
View 1 RepliesI have a website on the IIS but it has only the aspx file. Now I need to add the code behind for some pages. How do I go about this? I've been trying to add the attribute "codebehind" and "autoeventwireup" on the top of the aspx file but no luck (the page_load event is not being called). Also, if I double click on the button from the design view in Visual Studio, it creates the javascript handle (not the server code).
View 2 RepliesI am using Visual Studio 2010 now. I do not have network access to my database because of some connectivity issues. Are there any good articles on how to manually wireup Entity Framework objects manually? Or, is this just unrealistic?
View 3 RepliesI know there is a class called Random but how do I generate random numbers manually? without using Random class.
View 6 RepliesI'm using Visual Studio 2008. I've added a control on a page but can't reference it in code-behind file. When I looked at the Code-Gen file, I didn't find my new control. It looks like Visual Studio didn't update Code Gen file to include my control. Is there a way to manually re-generate that Code Gen file?
View 1 RepliesI have a class that is creating an instance of StreamReader to an xml file on the local filesystem.
It may be possible that this same file is requested multiple times per-second.
I was wondering whether I need to manually add this file to the System.Web.Cache and read it from there, or whether Windows itself is clever enough to cache the item itself so that it 'knows' when ASP.NET requests this file the second/third etc time that it doesnt have to do a disk seek/read operation and pulls it from its own cache?
This article: http://dotnetperls.com/file-read-benchmarks seems to back this up, but this: article:
[URL](although not discussing from a performance perspective, and maybe for other reasons entirely) lists how to add a physical file to the cache.
I downloaded the trial version of abcpdf, which is absolutely fantastic!
Anyway, real simple, you just need to reference the .dll and off you go...
So, I got my code working, but when I moved to production server I hit a wall.
It definitely has to do with the .dll because when I comment out the pdf sub routine, the code executes and completes all other tasks. When I uncomment, It's not working.
The trouble is, on my server I don't have the full version of VS, so I am unable to add a reference, which I presume takes care of the web.config settings? I manually dropped the .dll into the bin folder and I added the assembly line into web.config, but, as I don't have the above, I am not sure if the token key is correct.
To test this, I uploaded the working .dll file to my server, which I assumed the key is associated with, but still the same.
how to either get the correct key and/or how to reference an assembly manually? Is there something I have missed?
I'm trying to follow a tutorials on how to use helpers to use video, audio, Twitter, etc. And for that I need Microsoft.Web.Helpers. But when I try to add it via NUPACK, the whole application crushes. Even when I remove the package, the application never recovers. Below is the error I'm getting.
[Code]....
Where can I get Microsoft.Web.Helpers so that I can just add it manually to my project.
just would like to ask if it is possible to manually populate the datagrid in asp.net 2003 using vb.net
we usually populate the datagrid using this code, in this code what it does is it populate the datagrid base on your query , it's automated you can't edit or evaluate the data inside.
dataGrid.DataSource = ds
dataGrid.DataBind()
What if if I want to edit or evaluate the data inside the DataSet?
I am working on writing some code to scrub user input to my ASP.NET site. I need to scrub input to remove all references to ASCII characters 145, 146, 147, 148 which are occasionally getting input from my mac users who are copying and pasting content they write in a word processor on their macs.
My issue is the following three strings I am led to believe should output the same text.
string test1 = Convert.ToChar(147).ToString();
string test2 = String.Format("'{0}'", Convert.ToChar(147));
char[] characters = System.Text.Encoding.ASCII.GetChars(new byte[] { 147 });
string test3 = new string(characters);
Yet when I set an ASP TextBox to equal the following
txtShowValues.Text = test1 + "*" + test2 + "*" + test3;
I get a blank value for test1, test2 works correctly, and test3 outputs as a '?'.
Can someone explain what is happening differently. I am hoping this will help me understand how .NET is using ASCII values for characters over 128 so that I can write a good scrubbing script.
EDIT
The values I mentioned (145 - 148) are curly quotes. So single left, single right, double left, double right.
By "works correctly" I mean it outputs a curly quote to my browser.
SECOND EDIT
The following code (mentioned in an answer) outputs the curly quotes as well. So maybe the problem was using ASCII in test 3.
char[] characters2 = System.Text.Encoding.Default.GetChars(new byte[] { 147 });
string test4 = new string(characters2);
THIRD EDIT
I found a mac that I could borrow and was able to duplicate the problem. When I copy and paste text that has quote symbols in them from Word into my web app on the mac it pastes curly quotes (147 and 148). When I hit save curly quotes are saved to the database, so I will use the code you all helped me with to scrub that content.
FOUTH EDIT
Spent some time writing more sample code based on the responses here and noticed it has something to do with MultiLine TextBoxes in ASP.NET. There was good info here, so I decided to just start a new question: http://stackoverflow.com/questions/2215547/asp-net-multiline-textbox-allowing-input-above-utf-8
ddlOptions is drop down list selectedOptions is repeater control and it's just provisional code of my final control.
What I want to do is to get data for _ddlOption on !IsPostBack. There is Add button that enables user to move selected drop down item to repeater control.
It the following way of updating Repeater.Items correct? I found many solution of adding/removing elements manually using DataSource, but here my DataSource is null, as I set it only on !IsPostBack.
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when your using ASP.NET Wizards to create a login, it uses a set of auto generated tables using the aspnet_regsql.exe tool...When you create a user using the wizard it generates a very long userID
"a40cf936-1596-4560-a26c-450792e2c8c0" I want to add users using another program that connects to this database... but how does visual studio auto-generate this ID. I want to auto-generate it as well
I have a jQueryUI dialog with some textboxes, plus a button. Right now, the asp:Button tag used to generate the button automatically sets its type as type="submit". The structure of the dialog is such that pressing enter at any of the textboxes should not call the button click event. It seems like the cleanest way to solve the problem, if it is doable, is to manually set the button's type to something other than submit. Is there a way to do this?
Edit: Forgot to mention this, but the button text is bound to a database item by <%# Eval() %>, which doesn't work without a server-side tag.
Imagine the scenario of a contact form, whereby data is to be collected and further transmitted via email to the appropriate address. One of the important fields asks for an email address, pretty vital to instrumenting the call-back. So say I check for the entry of something, anything, in the mail address field using a RequiredFieldValidator; a further check in code will determine if the mail address supplied is usable, or not. Given that both of these checks are essentially validation, I would simply like to reuse the RequiredFieldValidator from my code-behind; is this possible? For example, something as simple as:
MyValidator.Show();
return;
What I have done in the past is add a Label to the form as well, and just use a similar tactic, only making the control visible as needs be and returning. Ideally I'd like to get rid of this altogether and simply use one control to output my error message. For an idea of current code, below is a skeletal listing, which, even as such, is the concept in its entirety: Within the page:
<asp:TextBox runat="server" ID="MailAddressTextBox" />
<asp:RequiredFieldValidator runat="server" ID="MailAddressValidator" ErrorMessage="Enter a valid mail address" ControlToValidate="MailAddressTextBox" />
<asp:Label runat="server" ID="MailAddressError" Text="Enter a valid mail address" Visible="false" />
And within the code-behind:
MailAddress enquirerMail;
try
{
enquirerMail = new MailAddress(MailAddressTextBox.Text);
}
catch
{
MailAddressError.Visible = true;
return;
}
The pitfall with the approach of hiding/showing error labels, other than the obvious of extra controls, is the maintenance of their visibility, and also a label for each error, or lists of messages and in-code alterations to the display.
Also, multiple validators is something I want to avoid, at least in this particular instance; a RegularExpressionValidator won't cut it here, as we all know just selecting the 'best' regex for parsing mail addresses can be a feat in itself, or maybe it will contain more characters than the actual page content + markup. Another reason for my aversion to regex, should you need one, is that, ultimately, I have to implement the above try/catch validation regardless, as even a 'validated' address may cause failure in the MailAddress constructor.
