в 15:30, 26 мая 2010

2010-05-26T15:30:47Z

Admin: 1 версия

2010-05-26T11:51:23Z

1 версия

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==Array.IndexOf and Array.LastIndexOf (VB.net)==



<source lang="csharp">
<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
Dim intCounter As Integer = -1
Dim AnimalArray(4) As string
AnimalArray(0) = "Dog"
AnimalArray(1) = "Cat"
AnimalArray(2) = "Elephant"
AnimalArray(3) = "Lion"
AnimalArray(4) = "Cat"
Do
intCounter = Array.IndexOf(AnimalArray, "Cat", intCounter+1)
MyText.InnerHtml += "AnimalArray(" & intCounter & ")<br/>"
Loop Until intCounter = Array.LastIndexOf(AnimalArray, "Cat")
End Sub
</script>
<html>
The string "Cat" occurs in the following elements:
<br/>
<div id="MyText" runat="server" />
</html>

</source>

==Array.IndexOf(), Array.LastIndexOf() (C#)==



<source lang="csharp">
<%@Page Language="c#" %>
<script runat="server" Language="c#">
void Page_Load()
{
int intCounter = -1;
string[] AnimalArray = new string[5]
{ "Dog", "Cat", "Elephant", "Lion", "Cat"};
do
{
intCounter = Array.IndexOf(AnimalArray, "Cat", intCounter+1);
MyText.InnerHtml += "AnimalArray[" + intCounter + "]<br/>";
} while (intCounter != Array.LastIndexOf(AnimalArray, "Cat"));
}
</script>
<html>
The string "Cat" occurs in the following elements:
<br/>
<div id="MyText" runat="server" />
</html>

</source>

==Array Reverse Demo (VB.net)==



<source lang="csharp">
<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
Dim AnimalArray(4) As String
Dim strAnimal As String
AnimalArray(0) = "Dog"
AnimalArray(1) = "Cat"
AnimalArray(2) = "Elephant"
AnimalArray(3) = "Lion"
AnimalArray(4) = "Cat"
Array.Reverse(AnimalArray)
For Each strAnimal In AnimalArray
MyDropDownList.Items.Add(strAnimal)
Next
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>

</source>

==Change array length (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String
Sub Page_Load
ColorList(0) = "Red"
ColorList(1) = "Orange"
ColorList(2) = "Yellow"
ColorList(3) = "Green"
ColorList(4) = "Blue"
ColorList(5) = "Indigo"
ColorList(6) = "Violet"
ReDim Preserve ColorList(7)
ColorList(7) = "Magenta"

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next
End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = "You selected " & ddlColorList.SelectedItem.Value
lblOutputMessage.ForeColor = _
System.Drawing.Color.FromName(ddlColorList.SelectedItem.Text)
End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
Select a color from the list:<asp:DropDownList id="ddlColorList" runat="server"></asp:DropDownList>
<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
</p>
<p>
<asp:Label id="lblOutputMessage" runat="server"></asp:Label>
</p>
</form>
</body>
</html>

</source>

==Define and use array (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String

Sub Page_Load
ColorList(0) = "Red"
ColorList(1) = "Orange"
ColorList(2) = "Yellow"
ColorList(3) = "Green"
ColorList(4) = "Blue"
ColorList(5) = "Indigo"
ColorList(6) = "Violet"

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next
End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = "You selected " & ddlColorList.SelectedItem.Value
lblOutputMessage.ForeColor = _
System.Drawing.Color.FromName(ddlColorList.SelectedItem.Text)
End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
Select a color from the list:<asp:DropDownList id="ddlColorList" runat="server"></asp:DropDownList>
<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
</p>
<p>
<asp:Label id="lblOutputMessage" runat="server"></asp:Label>
</p>
</form>
</body>
</html>

</source>

==For each loop: array (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String

Sub Page_Load
ColorList(0) = "Red"
ColorList(1) = "Orange"
ColorList(2) = "Yellow"
ColorList(3) = "Green"
ColorList(4) = "Blue"
ColorList(5) = "Indigo"
ColorList(6) = "Violet"
Array.Sort(ColorList)

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next
End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = "You selected " & ddlColorList.SelectedItem.Value
lblOutputMessage.ForeColor = _
System.Drawing.Color.FromName(ddlColorList.SelectedItem.Text)
End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
Select a color from the list:<asp:DropDownList id="ddlColorList" runat="server"></asp:DropDownList>
<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
</p>
<p>
<asp:Label id="lblOutputMessage" runat="server"></asp:Label>
</p>
</form>
</body>
</html>

</source>

==For Each loop through an Array (VB.net)==



<source lang="csharp">
<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load()
Dim AnimalArray(4) As String
Dim strAnimal As String
AnimalArray(0) = "Dog"
AnimalArray(1) = "Cat"
AnimalArray(2) = "Elephant"
AnimalArray(3) = "Lion"
AnimalArray(4) = "Cat"
For Each strAnimal In AnimalArray
MyDropDownList.Items.Add(strAnimal)
Next
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>

</source>

==Get array by index (VB.net)==



<source lang="csharp">
<%@Page language="vb" %>
<script runat="server" language="vb">
Sub Page_Load(Source As Object, E as EventArgs)
Dim AnimalArray(4) as string
AnimalArray(0) = "Dog"
AnimalArray(1) = "Cat"
AnimalArray(2) = "Elephant"
AnimalArray(3) = "Lion"
AnimalArray(4) = "Cat"
MyLabel.Text = AnimalArray.GetValue(2)
End Sub
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:label id="MyLabel" runat="server" />
</form>
</html>

</source>

==Get array element by index (C#)==



<source lang="csharp">
<%@Page Language="c#" %>
<script runat="server" Language="c#">
void Page_Load()
{
string[] AnimalArray = new string[5]{ "Dog", "Cat", "Elephant", "Lion", "Cat"};
MyLabel.Text = AnimalArray.GetValue(2).ToString();
}
</script>
<html>
<asp:label id="MyLabel" runat="server" />
</html>

</source>

==Sort an Array (VB.net)==



<source lang="csharp">
<%@ Page Language="VB" %>
<script runat="server">
Dim ColorList(6) as String

Sub Page_Load
ColorList(0) = "Red"
ColorList(1) = "Orange"
ColorList(2) = "Yellow"
ColorList(3) = "Green"
ColorList(4) = "Blue"
ColorList(5) = "Indigo"
ColorList(6) = "Violet"
Array.Sort(ColorList)

If Not Page.IsPostback
Dim ColorName as String

For Each ColorName in ColorList
ddlColorList.Items.Add(ColorName)
Next
End If
End Sub

Sub btnSelectColor_Click(sender As Object, e As EventArgs)
lblOutputMessage.Text = "You selected " & ddlColorList.SelectedItem.Value
lblOutputMessage.ForeColor = _
System.Drawing.Color.FromName(ddlColorList.SelectedItem.Text)
End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<p>
Select a color from the list:<asp:DropDownList id="ddlColorList" runat="server"></asp:DropDownList>
<asp:Button id="btnSelectColor" onclick="btnSelectColor_Click" runat="server" Text="Click here!"></asp:Button>
</p>
<p>
<asp:Label id="lblOutputMessage" runat="server"></asp:Label>
</p>
</form>
</body>
</html>

</source>

==Sort array reversely (C#)==



<source lang="csharp">
<%@Page Language="c#" %>
<script runat="server" Language="c#">
void Page_Load()
{
string[] AnimalArray = new string[5]
{ "Dog", "Cat", "Elephant", "Lion", "Cat" };
Array.Reverse(AnimalArray);
foreach (string strAnimal in AnimalArray)
{
MyDropDownList.Items.Add(strAnimal);
}
}
</script>
<html>
<form id="Form1" method="post" runat="server">
<asp:dropdownlist id="MyDropDownList" runat="server" />
</form>
</html>

</source>

==Use array: find item index (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="true" %>
<script runat="server">
void Page_Load(){
if (Page.IsPostBack){
string[] choice = new string[3];
choice[0] = "1";
choice[1] = "2";
choice[2] = "3";
lblShipper.Text = "Shipper ID for " + txtShipNum.Text + " is " + Array.IndexOf(choice, txtShipNum.Text);
lblShipper.Visible = true;
}
}
</script>
<html>
<head>
<title>Array Example</title>
</head>
<body>
<form runat="server">
Please enter your shipper name.
(should be "1" or "2" or "3")
<br><asp:TextBox id="txtShipNum" runat="server" width="300px"></asp:TextBox>
<br />
Press button to find the Shipper ID number
<asp:Button id="Button1" runat="server" Text="Submit"></asp:Button>
<br />
<asp:Label id="lblShipper" runat="server"></asp:Label>
</form>
</body>
</html>

</source>

==Use String Array to store Asp Label Text (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="true" %>
<script runat="server">
void Page_Load()
{
string [] strMarx = new string[6];
strMarx[0] = "A";
strMarx[1] = "B";
strMarx[2] = "C";
strMarx[3] = "D";
strMarx[4] = "E";
strMarx[5] = "F";

lblMarx.Text = strMarx[3];
string [] strFriends = new string[5];
strFriends[1] = "Mr. J";
strFriends[4] = "Mr. G";
strFriends[3] = "Mrs. S";
lblFriend.Text = strFriends[4];
}
</script>
<html>
<head>
<title>Array Example</title>
</head>
<body>
<form runat="server">
A Marx Brother:
<asp:Label id="lblMarx" runat="server"></asp:Label><br>
A friend:
<asp:Label id="lblFriend" runat="server"></asp:Label><br>
</form>
</body>
</html>

</source>

==Use Two dimensional array (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="true" %>
<script runat="server">
void Page_Load()
{
if(Page.IsPostBack)
{
string [,] strClient = new string[4,3]; // 4 people, 3 attributes each

strClient[0,0] = "First Name 1";
strClient[0,1] = "Last Name 1";
strClient[0,2] = "111-111-1111";
strClient[1,0] = "First Name 2";
strClient[1,1] = "Last Name 2";
strClient[1,2] = "222-222-2222";
strClient[2,0] = "First Name 3";
strClient[2,1] = "Last Name 3";
strClient[2,2] = "333-333-3333";
strClient[3,0] = "First Name 4";
strClient[3,1] = "Last Name 4";
strClient[3,2] = "444-444-4444";

int intIDnumber = Convert.ToInt32(txtID.Text);

lblNameFirst.Text = strClient[intIDnumber,0];
lblNameLast.Text = strClient[intIDnumber,1];
lblTel.Text = strClient[intIDnumber,2];

}

}
</script>
<html>
<head>
<title>Array Multidimensional Example</title>
</head>
<body>
<form runat="server">
Enter a client number (from 0 to 3)
<asp:TextBox runat="server" ID="txtID"></asp:TextBox><br>

<asp:Label id="lblNameFirst" runat="server"></asp:Label><br>
<asp:Label id="lblNameLast" runat="server"></asp:Label><br>
<asp:Label id="lblTel" runat="server"></asp:Label><br>

<asp:Button runat="server" Text="Button"></asp:Button>
</form>
</body>
</html>

</source>

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ASP.Net/Collections/Array - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия