ASP.NET AJAX, not let autopostback items cause page reload when the postback occurs

e.g. on my form, clicking on the navigation items (or a dropdownlist control) on the left of screen will filter/refresh the gridview on the right hand side, how can i achieve this using Ajax and not let the navigation items (or a dropdownlist control) to reload themselves? (only the gridview refreshes) the dropdownlist has already been placed outside of UpdatePanel. the whole page reloads because the dropdownlist is "autopostback". I found 3 lines of code that helped me to stop the whole page reload:

This can also be achieved by setting "Triggers" property of the UpdatePanel in design view

any ideas?

i need to write up a research proposal this semester, what are the hot topics related to information systems at the moment? hope someone can help me out~

I am back!

happy chinese new year! now i am back to work & study, wish myself great achievement in 2007!

Controlling browser's control items

http://msdn.microsoft.com/library/default.asp?url=/workshop/author/dhtml/reference/methods/open_0.asp

Collapse and Expand HTML Elements

domCollapse
http://www.onlinetools.org/tools/domcollapse/index.html

free rich text editors

TinyMCE
http://tinymce.moxiecode.com/
http://rorlach.de/mediawiki/index.php/PHP

Rich Text Editor
http://www.websitescreation.ca/Products/RichText.php

char, varchar, nchar, nvarchar

nchar and nvarchar are used for unicode data, which require twice as much space (bytes) to store the same non-unicode characters. It is a significant disadvantage to use nchar and nvarchar if we do not need unicode charactors. Only use nchar & nvarchar when you need unicode charactors
use char & nchar when the length of the data is fixed, e.g. all customerID must be CUST_XXXX. use varchar and nvarchar when the length of the data is uncertain, e.g. customerID starts from 1 to 100000.

WebControls V,S HtmlControls in ASP.NET2.0

http://www.odetocode.com/Articles/348.aspx

asp.net2.0 upload file

use FileUpload control. this example checks for file type, empty file

protected void btnSaveFile_Click(object sender, EventArgs e)
{
if (IsPostBack)
{
Boolean fileOK = false;
String path = @"C:\temp\";
if (FileUpload1.HasFile)
{
String fileExtension =
System.IO.Path.GetExtension(FileUpload1.FileName).ToLower();
String[] allowedExtensions =
{ ".gif", ".png", ".jpeg", ".jpg" };
for (int i = 0; i < fileextension ="="" fileok =" true;" text = "File uploaded!" text = "File could not be uploaded." text = "Cannot accept files of this type.">

reference: http://msdn2.microsoft.com/en-us/library/ms227669.aspx

ASP.NET 2.0 “Ambiguous match found” error

when trying to load an ASPX page. The error was a “Parser Error” with “Ambiguous match found”.
The problem could be caused by having a member variable and a control variable with the same name (but different casing)
e.g.
private double aVariable = 0;
AnVariable.Text = aVariable .ToString("c");
The code will compile, and will run locally, but fails when deployed.

The solution is to rename the private member variables

*Thanks to Simon for the finding
*the reference: http://weblogs.asp.net/pjohnson/archive/2006/08/11/Ambiguous-match-found.aspx

unit testing issue (access denied - aborted) - VS Team - Developers

Symptom:
when i try to test a method, the result says "Aborted", and the error message was:
"Failed to Queue Test Run "@MACHINE1" 2006-12-04 17:13:30' with id {********-****-****-****-************}: Microsoft.VisualStudio.TestTools.TestManagement.ExecutionException: Test Run deployment issue: The location of the file or directory '\\server1\users\ab\my documents\visual studio 2005\projects\webservicepractice1\testproject1\bin\debug\testproject1.dll' is not trusted."

Solution
1. Control Panel --> .NET Framework 2.0 Configuration --> Runtime Security Policy --> Machine --> All_Code
2. Right click All_Code, select "New...", and give a name for your new group. Click Next and Next again
3. Type in "\\machine_name\shared_folder\assembly.dll" or "\\machine_name\shared_folder\*" and click Next
5. Make sure permission is set to FullTrust. Click Next, and Finish

.NET should be closed all the time while doing these settings

create & call stored procedure in ASP.NET 2.0 & MSSQL DB

<--CREATE-->
ALTER PROCEDURE dbo.NumOfRecords
AS
SELECT COUNT(*) FROM Branding
RETURN

<--CALL-->
protected void Button8_Click(object sender, EventArgs e)
{
SqlConnection newConn = new SqlConnection("Data Source=localhost;Initial Catalog=TCdatabase;Integrated Security=True;Pooling=False");
SqlCommand newComm = new SqlCommand("NumOfRecords", newConn);

newConn.Open();
int theTotal = (Int32)newComm.ExecuteScalar();
Response.Write(theTotal.ToString());
newConn.Close();
}

messagebox in ASP.NET 2.0

The basic concept is to use JavaScript. Below only shows one way of implementing javascript for messagebox:

switch (txtName.Value)
{
case ("aaa"):
Page.ClientScript.RegisterStartupScript(this.GetType(),"Alert","< script language="javascript" >alert('AAA');< /script >
");
break;

case ("bbb"):
Page.ClientScript.RegisterStartupScript(this.GetType(), "Alert", "< script language="javascript" >alert('BBB');< /script >
");
break;


}

deploy applications that use Microsoft SQL Server 2005 Express Edition (SQL Server Express),

http://msdn2.microsoft.com/en-us/library/ms165639.aspx

realize inputBox in C#.net by referencing VB.net component

this will add VB.NET runtime dependency in C# application, you can even add a reference to Microsoft.VisualBasic assembly and call InputBox function implemented there:

string aaa = Microsoft.VisualBasic.Interaction.InputBox("enter a name", "Inputbox Demo", "ROCKY", 100, 100);
MessageBox.Show(aaa);

Another way of doing it without referencing VB.net is to create a form that looks like an inputBox:


using System;

namespace MyNamespace
{
public class InputDialog : System.Windows.Forms.Form
{
private System.Windows.Forms.TextBox txtInput;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button cmdOK;
private System.Windows.Forms.Button cmdCancel;

public string Value
{
get
{
return txtInput.Text;
}
set
{
txtInput.Text = value;
}
}

public InputDialog()
{
// Required for Windows Form Designer support
InitializeComponent();
}

private void InitializeComponent()
{
this.txtInput = new System.Windows.Forms.TextBox();
this.label1 = new System.Windows.Forms.Label();
this.cmdOK = new System.Windows.Forms.Button();
this.cmdCancel = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// txtInput
//
this.txtInput.Location = new System.Drawing.Point(48, 16);
this.txtInput.Name = "txtInput";
this.txtInput.Size = new System.Drawing.Size(232, 20);
this.txtInput.TabIndex = 0;
this.txtInput.Text = "";
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(8, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(33, 16);
this.label1.TabIndex = 1;
this.label1.Text = "Input:";
//
// cmdOK
//
this.cmdOK.DialogResult = System.Windows.Forms.DialogResult.OK;
this.cmdOK.Location = new System.Drawing.Point(69, 48);
this.cmdOK.Name = "cmdOK";
this.cmdOK.TabIndex = 2;
this.cmdOK.Text = "OK";
//
// cmdCancel
//
this.cmdCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel;
this.cmdCancel.Location = new System.Drawing.Point(149, 48);
this.cmdCancel.Name = "cmdCancel";
this.cmdCancel.TabIndex = 2;
this.cmdCancel.Text = "Cancel";
//
// Form1
//
this.AcceptButton = this.cmdOK;
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.CancelButton = this.cmdCancel;
this.ClientSize = new System.Drawing.Size(292, 86);
this.Controls.Add(this.cmdOK);
this.Controls.Add(this.label1);
this.Controls.Add(this.txtInput);
this.Controls.Add(this.cmdCancel);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
}
}
}

convert sting value to the value of datetimepicker

generally the format should be everything except the AM part.

DateTime result = DateTime.Now;

if (DateTime.TryParse(this.label1.Text, out result))

{

this.dateTimePicker.Value = result;

}

We can also use DateTime.TryParseExact:
http://msdn2.microsoft.com/en-us/library/h9b85w22(VS.80).aspx

WinXP folder/file sharing ------ create a hiden share

A> create a hiden share
1. right click disk or folder you want to share and click on Sharing and Security
2. specify a share name with 1 - 11 characters, end with a "$"
3. if want to give edit rights, click on "allow net work users to change my files


B> access the hiden share
1. My Computer --> Tools --> Map Netwok Drive
2. give an unused drive letter and network parth of the hiden share, make sure to include the "$"
3. if select "Reconnect at logon", connection will be connected everytime start the pc, otherwise have to manually map everytime

inputbox in C#.net 2005 winform app

C# does not support inputbox, but C#.net2005 can have added reference to Microsoft.VisualBasic.dll

then in C#.net2005, you will be able to something like:

private void button3_Click(object sender, EventArgs e)
{
string userInput = Microsoft.VisualBasic.Interaction.InputBox("Give me something, I will tell you what you got?", "Question Popup", "Default Text",400,400).ToString();
MessageBox.Show(userInput);
}

use of YesNoCancel in messagebox.show() method in C#.net 2005 winform application

private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = false;
DialogResult result = MessageBox.Show("Do you want to save any changes before closing this window? \n\n Click on 'Yes' to save; or \n Click on 'No' to close without saving; or \n Click on 'Cancel' to do nothing.", "Closing Window", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button3);

if (result == DialogResult.Yes)
{
MessageBox.Show("you clicked on YES, c u!");
}
else if (result == DialogResult.No)
{
MessageBox.Show("you clicked on NO, c u!");
}
else
{
e.Cancel = true;
}
}

detailed explanation of application.settings in C#.net 2005

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnvs05/html/SettingsCS_RL.asp