1. 打开新的窗口并传送参数:
传送参数:
response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")
接收参数:
string a = Request.QueryString("id");
string b = Request.QueryString("id1");
2.为按钮添加对话框
Button1.Attributes.Add("onclick","return confirm(’确认?’)");
button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
3.删除表格选定记录
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "Delete from Employee where emp_id = " + intEmpID.ToString()
4.删除表格记录警告
private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
{
switch(e.Item.ItemType)
{
case ListItemType.Item :
case ListItemType.AlternatingItem :
case ListItemType.EditItem:
TableCell my ......
1. 打开新的窗口并传送参数:
传送参数:
response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")
接收参数:
string a = Request.QueryString("id");
string b = Request.QueryString("id1");
2.为按钮添加对话框
Button1.Attributes.Add("onclick","return confirm(’确认?’)");
button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
3.删除表格选定记录
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "Delete from Employee where emp_id = " + intEmpID.ToString()
4.删除表格记录警告
private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
{
switch(e.Item.ItemType)
{
case ListItemType.Item :
case ListItemType.AlternatingItem :
case ListItemType.EditItem:
TableCell my ......
SQl Xml和C# Xml数据的一点操作总结
在此申明Xml是InfoSet数据不是字符串,所以在此强烈反对用string拼接xml。数据库可以存放xml类型数据,那么该数据的具体操作又如何了。
1.首先建立一张含有xml数据类型的表
CREATE TABLE [dbo].[TestXml](
[ID] [bigint] IDENTITY(1,1) NOT NULL,
[Message] [xml] NULL,
CONSTRAINT [PK_TestXml] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
2.创建相应的DataSet
注意默认Message是String类型,为此我们要把它改为XDocument或则XmlDocument,如:
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public XDocument Message {
get {
try {
  ......
SQl Xml和C# Xml数据的一点操作总结
在此申明Xml是InfoSet数据不是字符串,所以在此强烈反对用string拼接xml。数据库可以存放xml类型数据,那么该数据的具体操作又如何了。
1.首先建立一张含有xml数据类型的表
CREATE TABLE [dbo].[TestXml](
[ID] [bigint] IDENTITY(1,1) NOT NULL,
[Message] [xml] NULL,
CONSTRAINT [PK_TestXml] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
2.创建相应的DataSet
注意默认Message是String类型,为此我们要把它改为XDocument或则XmlDocument,如:
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public XDocument Message {
get {
try {
  ......
SQl Xml和C# Xml数据的一点操作总结
在此申明Xml是InfoSet数据不是字符串,所以在此强烈反对用string拼接xml。数据库可以存放xml类型数据,那么该数据的具体操作又如何了。
1.首先建立一张含有xml数据类型的表
CREATE TABLE [dbo].[TestXml](
[ID] [bigint] IDENTITY(1,1) NOT NULL,
[Message] [xml] NULL,
CONSTRAINT [PK_TestXml] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
2.创建相应的DataSet
注意默认Message是String类型,为此我们要把它改为XDocument或则XmlDocument,如:
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public XDocument Message {
get {
try {
  ......
下面给出了使用C# 开发的一个压缩ACCESS数据库的程序
像FolderBrowserDialog(用于浏览选择文件夹的对话框)、MessageBox(消息处理对话框)、DirectoryInfo(目录信息,可用于创建、检测是否存在等对目录的操作)、FileInfo(文件信息,可用于文件的检测、文件信息的获取、复制等操作)、DataGridView(数据表格控件,用于显示文件信息列表数据)、DataRowView(对一些数据源信息进行筛选,排序)、System.Diagnostics.Process.Start(启动其它程序打开文件夹目录),下面就依次介绍一下在此软件开发中我都使用到以上控件、对象的哪些内容。
一、FolderBrowserDialog(文件夹浏览对话框),在此软件中用于打开选择数据库根目录或打开创建、选择备份目录,下面是两处位置的代码详细介绍。
1.选择数据库目录,在此处不需要新建文件夹,因此屏蔽新建文件夹按钮。
C#代码
FolderBrowserDialog df = new FolderBrowserDialog();
//设置文件浏览对话框上的描述内容
  ......
下面给出了使用C# 开发的一个压缩ACCESS数据库的程序
像FolderBrowserDialog(用于浏览选择文件夹的对话框)、MessageBox(消息处理对话框)、DirectoryInfo(目录信息,可用于创建、检测是否存在等对目录的操作)、FileInfo(文件信息,可用于文件的检测、文件信息的获取、复制等操作)、DataGridView(数据表格控件,用于显示文件信息列表数据)、DataRowView(对一些数据源信息进行筛选,排序)、System.Diagnostics.Process.Start(启动其它程序打开文件夹目录),下面就依次介绍一下在此软件开发中我都使用到以上控件、对象的哪些内容。
一、FolderBrowserDialog(文件夹浏览对话框),在此软件中用于打开选择数据库根目录或打开创建、选择备份目录,下面是两处位置的代码详细介绍。
1.选择数据库目录,在此处不需要新建文件夹,因此屏蔽新建文件夹按钮。
C#代码
FolderBrowserDialog df = new FolderBrowserDialog();
//设置文件浏览对话框上的描述内容
  ......
在 .NET 里面使用 SQLite, 我这里使用的wrapper是 System.Data.SQLite,它只需要一个dll,接口符合ADO.Net 2.0的定义,性能也不错,NHibernate用的也是它,目前支持ADO.NET 3.5了,支持集成在 VS2005 和 VS2008里面,而且支持wince,是个亮点
因为符合ADO.NET的规范,所以使用方式,基本和 SqlClient, OleDb等原生的一致
using System.Data;
using System.Data.SQLite;
//...
using (SQLiteConnection cn = new SQLiteConnection(
"Data Source=Test.db3;Pooling=true;FailIfMissing=false")
)
//Pooling设置为true时,SQL连接将从连接池获得,如果没有则新建并添加到连接池中,默认是true。
//FailIfMissing默认为false,如果数据库文件不存在,会自动创建一个新的,若设置为true,将不会创建,而是抛出异常信息。
{
//在打开数据库时,会判断数据库是否存在,如果不存在,则在当前目录下创建一个
cn.Open();
using (SQLiteCommand cmd = new SQLiteCommand())
{
cmd.Connection = cn; ......
在 .NET 里面使用 SQLite, 我这里使用的wrapper是 System.Data.SQLite,它只需要一个dll,接口符合ADO.Net 2.0的定义,性能也不错,NHibernate用的也是它,目前支持ADO.NET 3.5了,支持集成在 VS2005 和 VS2008里面,而且支持wince,是个亮点
因为符合ADO.NET的规范,所以使用方式,基本和 SqlClient, OleDb等原生的一致
using System.Data;
using System.Data.SQLite;
//...
using (SQLiteConnection cn = new SQLiteConnection(
"Data Source=Test.db3;Pooling=true;FailIfMissing=false")
)
//Pooling设置为true时,SQL连接将从连接池获得,如果没有则新建并添加到连接池中,默认是true。
//FailIfMissing默认为false,如果数据库文件不存在,会自动创建一个新的,若设置为true,将不会创建,而是抛出异常信息。
{
//在打开数据库时,会判断数据库是否存在,如果不存在,则在当前目录下创建一个
cn.Open();
using (SQLiteCommand cmd = new SQLiteCommand())
{
cmd.Connection = cn; ......
Introduction
This article is about passing data between VB.NET/C# WinForms and JavaScript.
Before reading further, let me warn you that this article is not about ASP.NET. Concepts covered in the article are applied to Desktop applications.
Background
I was working on a project which required data transfer between my VB.NET WinForms application and the JavaScript (inside an HTML page). Along the way, I hit certain problems, and trying to resolve them cost plenty of time on the web (on Google mostly), so I thought of this article as a platform for developers looking to sort out similar issues. There isn't much detail on this topic on the web apart from a couple of Hello World examples from Microsoft on MSDN.
Starting point
OK, without any further talk, I will dig in to the subject.
Hello World
To start off, we'll start with a very simple example; all this will do is call a JavaScript function from VB.NET to display an alert with message 'Hello world'. Similarly, from the HTML pag ......
Introduction
This article is about passing data between VB.NET/C# WinForms and JavaScript.
Before reading further, let me warn you that this article is not about ASP.NET. Concepts covered in the article are applied to Desktop applications.
Background
I was working on a project which required data transfer between my VB.NET WinForms application and the JavaScript (inside an HTML page). Along the way, I hit certain problems, and trying to resolve them cost plenty of time on the web (on Google mostly), so I thought of this article as a platform for developers looking to sort out similar issues. There isn't much detail on this topic on the web apart from a couple of Hello World examples from Microsoft on MSDN.
Starting point
OK, without any further talk, I will dig in to the subject.
Hello World
To start off, we'll start with a very simple example; all this will do is call a JavaScript function from VB.NET to display an alert with message 'Hello world'. Similarly, from the HTML pag ......
Introduction
This article is about passing data between VB.NET/C# WinForms and JavaScript.
Before reading further, let me warn you that this article is not about ASP.NET. Concepts covered in the article are applied to Desktop applications.
Background
I was working on a project which required data transfer between my VB.NET WinForms application and the JavaScript (inside an HTML page). Along the way, I hit certain problems, and trying to resolve them cost plenty of time on the web (on Google mostly), so I thought of this article as a platform for developers looking to sort out similar issues. There isn't much detail on this topic on the web apart from a couple of Hello World examples from Microsoft on MSDN.
Starting point
OK, without any further talk, I will dig in to the subject.
Hello World
To start off, we'll start with a very simple example; all this will do is call a JavaScript function from VB.NET to display an alert with message 'Hello world'. Similarly, from the HTML pag ......
C#代码与javaScript函数的相互调用
问:
1.如何在JavaScript访问C#函数?
2.如何在JavaScript访问C#变量?
3.如何在C#中访问JavaScript的已有变量?
4.如何在C#中访问JavaScript函数?
问题1答案如下:
javaScript函数中执行C#代码中的函数:
方法一:1、首先建立一个按钮,在后台将调用或处理的内容写入button_click中;
2、在前台写一个js函数,内容为document.getElementById("btn1").click();
3、在前台或后台调用js函数,激发click事件,等于访问后台c#函数;
方法二:1、函数声明为public
后台代码(把public改成protected也可以)
public string ss()
{
return("a");
}
2、在html里用可以调用
前台脚本
< language=javascript>
var a = "";
alert(a);
方法三:1、< language="javascript">
方法四:< language="javascript">
function SubmitKeyClick() ......
C#代码与javaScript函数的相互调用
问:
1.如何在JavaScript访问C#函数?
2.如何在JavaScript访问C#变量?
3.如何在C#中访问JavaScript的已有变量?
4.如何在C#中访问JavaScript函数?
问题1答案如下:
javaScript函数中执行C#代码中的函数:
方法一:1、首先建立一个按钮,在后台将调用或处理的内容写入button_click中;
2、在前台写一个js函数,内容为document.getElementById("btn1").click();
3、在前台或后台调用js函数,激发click事件,等于访问后台c#函数;
方法二:1、函数声明为public
后台代码(把public改成protected也可以)
public string ss()
{
return("a");
}
2、在html里用可以调用
前台脚本
< language=javascript>
var a = "";
alert(a);
方法三:1、< language="javascript">
方法四:< language="javascript">
function SubmitKeyClick() ......