Change Language with session without Resources using C# and VB.Net in ASP.Net

kats9993

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User: kats9993
Posted: on May 02, 2017 02:58 AM
Forum: ASP.Net Web Forms
Answer: 1
Views: 8667

i have a two asp dot net page.

1. English.aspx and 2. Chinese.aspx

I want to open above page on laguage selection using master page.my language selection dropdown is in masterpage.aspx

so how can i do?

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kalpesh

1 16

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ANSWER
User: kalpesh
Replied: on May 20, 2017 03:59 AM
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You need to use same session logic concept to maintain the language value also the active page so you can easily maintain the page redirection on language change. On each page in PageLoad you need to sets its ActivePage session value and on Language change Dropdown Event you just need to check selected Language and activepage session value. Refer the below Sample code for Your Reference and implement it in your as per your code logic.

EnglishMasterPage.master

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table border="0" cellpadding="0" cellspacing="0">
            <tr>
                <td colspan="2">
                    <h1>
                        <span id="lblHeader">Multi Language Pages</span>
                    </h1>
                </td>
            </tr>
            <tr>
                <td>
                    &nbsp;&nbsp;&nbsp;&nbsp;<span id="lbllanguage" runat="server"></span>
                    <asp:DropDownList ID="ddlLangauges" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ChangeLanguges">
                        <asp:ListItem Text="English" Value="E"></asp:ListItem>
                        <asp:ListItem Text="Chinese" Value="C"></asp:ListItem>
                    </asp:DropDownList>
                </td>
                <td>
                    <div id="dvLogout" runat="server">
                        &nbsp;&nbsp;&nbsp;&nbsp;<asp:LinkButton ID="lnkLogout" runat="server" OnClick="Logout"
                            Text="Logout"></asp:LinkButton>
                    </div>
                </td>
            </tr>
        </table>
    </div>
    <div id="dvPageLinks" runat="server">
        <ul>
            <li><a href="EnglishDefaultPage.aspx">Home</a></li>
            <li><a href="English.aspx">First Page</a></li>
            <li><a href="SecondEnglishPage.aspx">SecondPage</a></li>
        </ul>
    </div>
    <div>
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        if (Session["ActivePage"] == null)
        {
            Session["ActivePage"] = "0";
        }

        if (Session["Language"] == null)
        {
            Session["Language"] = "E";
        }        

        ddlLangauges.ClearSelection();
        ddlLangauges.Items.FindByValue((string)Session["Language"]).Selected = true;

        dvPageLinks.Visible = dvLogout.Visible = (string)Session["ActivePage"] == "0" ? false : true;
    }
}

protected void ChangeLanguges(object sender, EventArgs e)
{
    Session["Language"] = ddlLangauges.SelectedItem.Value;
    Redirect();
}

protected void Logout(object sender, EventArgs e)
{
    Session.Abandon();
    Response.Redirect("~/EnglishLoginPage.aspx");
}

private void Redirect()
{
    string url = string.Empty;
    string ActivePage = (string)Session["ActivePage"];
    string language = (string)Session["Language"];

    switch (ActivePage)
    {
        case "0":
            url = language == "E" ? "~/EnglishLoginPage.aspx" : "~/ChineseLoginPage.aspx";
            break;
        case "1":
            url = language == "E" ? "~/EnglishDefaultPage.aspx" : "~/ChineseDefaultPage.aspx";
            break;
        case "2":
            url = language == "E" ? "~/English.aspx" : "~/Chinese.aspx";
            break;
        case "3":
            url = language == "E" ? "~/SecondEnglishPage.aspx" : "~/SecondChinesePage.aspx";
            break;

    }
    Response.Redirect(url);
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		If Session("ActivePage") Is Nothing Then
			Session("ActivePage") = "0"
                End If

	        If Session("Language") Is Nothing Then
			Session("Language") = "E"
		End If		

		ddlLangauges.ClearSelection()
		ddlLangauges.Items.FindByValue(DirectCast(Session("Language"), String)).Selected = True

		dvPageLinks.Visible = InlineAssignHelper(dvLogout.Visible, If(DirectCast(Session("ActivePage"), String) = "0", False, True))
	End If
End Sub

Protected Sub ChangeLanguges(sender As Object, e As EventArgs)
	Session("Language") = ddlLangauges.SelectedItem.Value
	Redirect()
End Sub

Protected Sub Logout(sender As Object, e As EventArgs)
	Session.Abandon()
	Response.Redirect("~/EnglishLoginPage.aspx")
End Sub

Private Sub Redirect()
	Dim url As String = String.Empty
	Dim ActivePage As String = DirectCast(Session("ActivePage"), String)
	Dim language As String = DirectCast(Session("Language"), String)

	Select Case ActivePage
		Case "0"
			url = If(language = "E", "~/EnglishLoginPage.aspx", "~/ChineseLoginPage.aspx")
			Exit Select
		Case "1"
			url = If(language = "E", "~/EnglishDefaultPage.aspx", "~/ChineseDefaultPage.aspx")
			Exit Select
		Case "2"
			url = If(language = "E", "~/English.aspx", "~/Chinese.aspx")
			Exit Select
		Case "3"
			url = If(language = "E", "~/SecondEnglishPage.aspx", "~/SecondChinesePage.aspx")
			Exit Select

	End Select
	Response.Redirect(url)
End Sub

EnglishLoginPage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <br />
    <br />
    <h1>
        Login Page</h1>
    <br />
    <br />
    User name: &nbsp;&nbsp;<asp:TextBox ID="txtUser" runat="server"></asp:TextBox>
    <br />
    <br />
    Password: &nbsp;&nbsp;<asp:TextBox ID="txtPass" runat="server" TextMode="Password"></asp:TextBox>
    <br />
    <br />
    <asp:Button ID="btnLogin" runat="server" OnClick="Login" Text="Login" />
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "0";
        Session["Language"] = "E";            
    }
}

protected void Login(object sender, EventArgs e)
{
    Session["ActivePage"] = "1";
    Response.Redirect("~/MultiLanguages/EnglishDefaultPage.aspx");
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "0"
		Session("Language") = "E"
	End If
End Sub

Protected Sub Login(sender As Object, e As EventArgs)
	Session("ActivePage") = "1"
	Response.Redirect("~/MultiLanguages/EnglishDefaultPage.aspx")
End Sub

EnglishDefaultPage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
<br />
<h1>This is Default Page</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "1";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "1"
	End If
End Sub

English.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
<br />
<h1>This is English Page</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "2";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "2"
	End If
End Sub

SecondEnglishPage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <br />
    <br />
    <h1>This is English Second Page</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "3";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs)
	If Not Me.IsPostBack Then
		Session("ActivePage") = "3"
	End If
End Sub

ChineseMasterPage.master

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <asp:ContentPlaceHolder ID="head" runat="server">
    </asp:ContentPlaceHolder>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table border="0" cellpadding="0" cellspacing="0">
            <tr>
                <td colspan="2">
                    <h1>
                        <span id="lblHeader">多语言页面</span>
                    </h1>
                </td>
            </tr>
            <tr>
                <td>
                    &nbsp;&nbsp;&nbsp;&nbsp;<span id="lbllanguage" runat="server"></span>
                    <asp:DropDownList ID="ddlLangauges" runat="server" AutoPostBack="true" OnSelectedIndexChanged="ChangeLanguges">
                        <asp:ListItem Text="英语" Value="E"></asp:ListItem>
                        <asp:ListItem Text="中文" Value="C"></asp:ListItem>
                    </asp:DropDownList>
                </td>
                <td>
                    <div id="dvLogout" runat="server">
                        &nbsp;&nbsp;&nbsp;&nbsp;<asp:LinkButton ID="lnkLogout" runat="server" OnClick="Logout"
                            Text="登出"></asp:LinkButton>
                    </div>
                </td>
            </tr>
        </table>
    </div>
    <div id="dvPageLinks" runat="server">
        <ul>
            <li><a href="ChineseDefaultPage.aspx">家</a></li>
            <li><a href="Chinese.aspx">第一页</a></li>
            <li><a href="SecondChinesePage.aspx">第二页</a></li>
        </ul> 
    </div>
    <div>
        <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
        </asp:ContentPlaceHolder>
    </div>
    </form>
</body>
</html>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        if (Session["ActivePage"] == null)
        {
            Session["ActivePage"] = "0";
        }
        if (Session["Language"] == null)
        {
            Session["Language"] = "C";
        }        

        ddlLangauges.ClearSelection();
        ddlLangauges.Items.FindByValue((string)Session["Language"]).Selected = true;
            
        dvPageLinks.Visible = dvLogout.Visible = (string)Session["ActivePage"] == "0" ? false : true;
    }
}

protected void ChangeLanguges(object sender, EventArgs e)
{
    Session["Language"] = ddlLangauges.SelectedItem.Value;
    Redirect();
}

protected void Logout(object sender, EventArgs e)
{
    Session.Abandon();
    Response.Redirect("~/ChineseLoginPage.aspx");
}

private void Redirect()
{
    string url = string.Empty;
    string ActivePage = (string)Session["ActivePage"];
    string language = (string)Session["Language"];

    switch (ActivePage)
    {
        case "0":
            url = language == "E" ? "~/EnglishLoginPage.aspx" : "~/ChineseLoginPage.aspx";
            break;
        case "1":
            url = language == "E" ? "~/EnglishDefaultPage.aspx" : "~/ChineseDefaultPage.aspx";
            break;
        case "2":
            url = language == "E" ? "~/English.aspx" : "~/Chinese.aspx";
            break;
        case "3":
            url = language == "E" ? "~/SecondEnglishPage.aspx" : "~/SecondChinesePage.aspx";
            break;

    }
    Response.Redirect(url);
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		If Session("ActivePage") Is Nothing Then
			Session("ActivePage") = "0"
                End If
		If Session("Language") Is Nothing Then
			Session("Language") = "C"
		End If		

		ddlLangauges.ClearSelection()
		ddlLangauges.Items.FindByValue(DirectCast(Session("Language"), String)).Selected = True

		dvPageLinks.Visible = InlineAssignHelper(dvLogout.Visible, If(DirectCast(Session("ActivePage"), String) = "0", False, True))
	End If
End Sub

Protected Sub ChangeLanguges(sender As Object, e As EventArgs)
	Session("Language") = ddlLangauges.SelectedItem.Value
	Redirect()
End Sub

Protected Sub Logout(sender As Object, e As EventArgs)
	Session.Abandon()
	Response.Redirect("~/ChineseLoginPage.aspx")
End Sub

Private Sub Redirect()
	Dim url As String = String.Empty
	Dim ActivePage As String = DirectCast(Session("ActivePage"), String)
	Dim language As String = DirectCast(Session("Language"), String)

	Select Case ActivePage
		Case "0"
			url = If(language = "E", "~/EnglishLoginPage.aspx", "~/ChineseLoginPage.aspx")
			Exit Select
		Case "1"
			url = If(language = "E", "~/EnglishDefaultPage.aspx", "~/ChineseDefaultPage.aspx")
			Exit Select
		Case "2"
			url = If(language = "E", "~/English.aspx", "~/Chinese.aspx")
			Exit Select
		Case "3"
			url = If(language = "E", "~/SecondEnglishPage.aspx", "~/SecondChinesePage.aspx")
			Exit Select

	End Select
	Response.Redirect(url)
End Sub

ChineseLoginPage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
    <br />
    <br />
    <h1>
        登錄頁面</h1>
    <br />
    <br />
    用戶名: &nbsp;&nbsp;<asp:TextBox ID="txtUser" runat="server"></asp:TextBox>
    <br />
    <br />
    密碼: &nbsp;&nbsp;<asp:TextBox ID="txtPass" runat="server" TextMode="Password"></asp:TextBox>
    <br />
    <br />
    <asp:Button ID="btnLogin" runat="server" OnClick="Login" Text="登錄" />
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "0";
        Session["Language"] = "C";
           
    }
}

protected void Login(object sender, EventArgs e)
{
    Session["ActivePage"] = "1";
    Response.Redirect("~/ChineseDefaultPage.aspx");
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "0"

		Session("Language") = "C"
	End If
End Sub

Protected Sub Login(sender As Object, e As EventArgs)
	Session("ActivePage") = "1"
	Response.Redirect("~/ChineseDefaultPage.aspx")
End Sub

ChineseDefaultPage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
<br />
<h1>这是默认页面</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "1";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "1"
	End If
End Sub

Chinese.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
    <br />
    <h1>这是中文页面</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "2";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "2"
	End If
End Sub

SecondChinesePage.aspx

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<br />
<br />
<h1>这是中国第二页</h1>
</asp:Content>

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        Session["ActivePage"] = "3";
    }
}

VB.Net

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles Me.Load
	If Not Me.IsPostBack Then
		Session("ActivePage") = "3"
	End If
End Sub

Screenshot

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Change Language with session without Resources using C# and VB.Net in ASP.Net

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