asp.net when data is converted to a ASP.net page, most of them are in the form of text. Sometimes in order to output, only use the display or implicit conversion is not, you need this section of the data conversion.
String output:
int intage=21;
String strage=intage.tostring ();
When you convert a datetime value, you can specify the output style for the time by placing an optional argument within the parentheses. Eg:dateCou.ToString ("D");
Format code and its implication:
d--is given in the following format: Thursday,september 21,2001
g--09/22/2001 09:12:23
t--give the time: 01:23:22 minutes and seconds
t--Give time: 01:23
D--mm/dd/yyyy
Data entry
convert function Encyclopedia:
Convert.toboolean ();
Convert.tobyte ();
Convert.tochar ();
Convert.todatetime ();
Convert.todecimal ();
Convert.todouble ();
Convert.ToInt16 ();
Convert.ToInt32 ();
Convert.toint64 ();
Convert.tosbyte ();
Convert.tosingle ();
Convert.touint16 ();
Convert.touint32 ();
Convert.touint64 ();
Seven, constant
Assignment: const int absolutezero=-273;
Must be declared in the class definition, not detached from the class.
VIII. Structured data types
1, array
Declares an array: string [] strsz;
In order to generate a declared array, it must be initialized: Strsz=new string[5];
Simultaneous initialization of the declaration: string [] asp=new string[44];
The subscript of the array starts with 0.
Assignment of variable: asp[0]= "SDF";
Asp[2]= "SDF";
......
Or:
string [] asp=new string[]{"asdf", "Asdfas"};
string [] asp=new string[2]{"asdf", "Asdfas"};
string [] asp={"asdf", "Asdfas"};
See examples:
<script runat= "Server" language= "C #" >
void Page_Load ()
{
string[] strarraydetails = new String[3];
int intloop;
Strarraydetails[0] = Text1. Text;
STRARRAYDETAILS[1] = Text2. Text;
STRARRAYDETAILS[2] = Text3. Text;
Message1.text = Strarraydetails[0];
Message2.text = strarraydetails[1];
Message3.text = strarraydetails[2];
}
</script>
<title>text Box example</title>
<body>
<asp:label id= "Message1" runat= "Server"/>
<br/>
<asp:label id= "Message2" runat= "Server"/>
<br/>
<asp:label id= "Message3" runat= "Server"/>
<br/>
<form runat= "Server" >
Please enter your name:
<asp:textbox id= "Text1" runat= "Server"/>
<br/><br/>
Please enter your address:
<asp:textbox id= "Text2" runat= "Server" rows=5 textmode= "Multiline"/>
<br/><br/>
Please enter your chosen password:
<asp:textbox id= "Text3" runat= "server" textmode= "password"/>
<br/><br/>
<input type= "Submit" >
</form>
</body>
Multidimensional Arrays:
string [,] strstr1=new string[3,2];
C # does not limit the size of the array, only memory to limit it, but in practice, when there are more than three-dimensional arrays, you need to consider other solutions, such as objects.
Irregular arrays:
string [] strnre=new string[2][];
String Strnre[0]=new string[8];
String Strnre[1]=new string[2];
2, structure
Definition: struct nameabc{...};
3, enumeration
Enum gender{male=0,female=1};
We'll learn XML together in the next chapter.
Finally found the teaching material I now study the online address:
Http://www.wrox.com/WileyCDA/WroxTitle/productCd-0764543709,descCd-download_code.html
Interested friends do not seek to learn together.
