博客 (186)

安装ASP.NET AJAX

安装Toolkit：
下载解压AjaxControlToolkit.zip移至
C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\AjaxControlToolkit

安装模板C:\Program Files\Microsoft ASP.NET\ASP.NET 2.0 AJAX Extensions\AjaxControlToolkit\AjaxControlExtender\AjaxControlExtender.vsi

若安装失败，手工建立以下文件夹：
\My Documents\Visual Studio 2005\Templates\ItemTemplates\Visual C#
\My Documents\Visual Studio 2005\Templates\ItemTemplates\Visual Basic
\My Documents\Visual Studio 2005\Templates\ProjectTemplates\Visual C#
\My Documents\Visual Studio 2005\Templates\ProjectTemplates\Visual Basic

把SampleWebSite\Bin下的AjaxControlToolkit.dll和AjaxControlToolkit.pdb
复制至Binaries下。
打开VS，添加选项卡AjaxControlToolkit，添加项浏览至Binaries\AjaxControlToolkit.dll

CatalogEdit.aspx

<asp:ListBox ID="ListBox1" runat="server" DataSourceID="SqlDataSource1" DataTextField="catalog"
DataValueField="ID" Rows="10"></asp:ListBox>
<asp:LinkButton ID="LinkButton_up" runat="server" OnClick="LinkButton_up_Click">上移</asp:LinkButton>
<asp:LinkButton ID="LinkButton_down" runat="server" OnClick="LinkButton_down_Click">下移</asp:LinkButton>
<asp:LinkButton ID="LinkButton_del" runat="server" OnClick="LinkButton_del_Click">删除</asp:LinkButton>
<asp:Label ID="Label_alert" runat="server" ForeColor="Red" Text="Label"></asp:Label><br />
<asp:TextBox ID="TextBox_newCatalog" runat="server"></asp:TextBox>
<asp:LinkButton ID="LinkButton_add" runat="server" OnClick="LinkButton_add_Click">新增</asp:LinkButton>
<asp:LinkButton ID="LinkButton_edit" runat="server" OnClick="LinkButton_edit_Click">修改</asp:LinkButton>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionStringLink %>"
DeleteCommand="DELETE FROM [xLinkCategory] WHERE [ID] = ?" InsertCommand="INSERT INTO [xLinkCategory] ([username],[catalog],[order]) VALUES (?,?,0)"
ProviderName="<%$ ConnectionStrings:ConnectionStringLink.ProviderName %>"
SelectCommand="SELECT [ID], [catalog] FROM [xLinkCategory] WHERE ([username] = ?) ORDER BY [order],[ID] desc"
UpdateCommand="UPDATE [xLinkCategory] SET [catalog] = ? WHERE [ID] = ?">
<DeleteParameters>
<asp:Parameter Name="ID" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="catalog" Type="String" />
<asp:Parameter Name="ID" Type="Int32" />
</UpdateParameters>
<SelectParameters>
<asp:SessionParameter Name="username" SessionField="username" Type="String" />
</SelectParameters>
<InsertParameters>
<asp:SessionParameter Name="username" SessionField="username" Type="String" />
<asp:Parameter Name="catalog" Type="String" />
</InsertParameters>
</asp:SqlDataSource>

CatalogEdit.aspx.cs

/**//// <summary>
/// 上移
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkButton_up_Click(object sender, EventArgs e)
{
if (ListBox1.SelectedItem != null && ListBox1.SelectedIndex > 0)
{
string tempValue = ListBox1.SelectedValue;
string tempText = ListBox1.SelectedItem.Text;
int index = ListBox1.SelectedIndex;

ListBox1.SelectedItem.Value = ListBox1.Items[index - 1].Value;
ListBox1.SelectedItem.Text = ListBox1.Items[index - 1].Text;
ListBox1.Items[index - 1].Value = tempValue;
ListBox1.Items[index - 1].Text = tempText;

ListBox1.SelectedIndex--;

operateDB_move();
}
}
/**//// <summary>
/// 下移
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkButton_down_Click(object sender, EventArgs e)
{
if (ListBox1.SelectedItem != null && ListBox1.SelectedIndex < ListBox1.Items.Count - 1)
{
string tempValue = ListBox1.SelectedValue;
string tempText = ListBox1.SelectedItem.Text;
int index = ListBox1.SelectedIndex;

ListBox1.SelectedItem.Value = ListBox1.Items[index + 1].Value;
ListBox1.SelectedItem.Text = ListBox1.Items[index + 1].Text;
ListBox1.Items[index + 1].Value = tempValue;
ListBox1.Items[index + 1].Text = tempText;

ListBox1.SelectedIndex++;

operateDB_move();
}
}
/**//// <summary>
/// 添加
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkButton_add_Click(object sender, EventArgs e)
{
if (TextBox_newCatalog.Text != "")
{
//检查同名
bool goon = true;
foreach (ListItem li in ListBox1.Items)
{
if (li.Text == TextBox_newCatalog.Text)
{
goon = false;
}
}

if (goon)
{
//操作
SqlDataSource1.InsertParameters["catalog"].DefaultValue = TextBox_newCatalog.Text;
SqlDataSource1.Insert();

//设置selected
if (ListBox1.Items.Count > 0)
{
ListBox1.SelectedIndex = 0;
}
}
else
{
Label_alert.Text = "已存在";
}
}
}
/**//// <summary>
/// 修改
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkButton_edit_Click(object sender, EventArgs e)
{
if (TextBox_newCatalog.Text != "" && ListBox1.SelectedItem != null)
{
int index = ListBox1.SelectedIndex;

//检查同名
bool goon = true;
foreach (ListItem li in ListBox1.Items)
{
if (li.Text == TextBox_newCatalog.Text)
{
goon = false;
}
}

if (goon)
{
//操作
SqlDataSource1.UpdateParameters["catalog"].DefaultValue = TextBox_newCatalog.Text;
SqlDataSource1.UpdateParameters["ID"].DefaultValue = ListBox1.SelectedItem.Value;
SqlDataSource1.Update();

//设置selected
ListBox1.SelectedIndex = index;
}
else
{
Label_alert.Text = "已存在";
}
}
}
/**//// <summary>
/// 删除
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void LinkButton_del_Click(object sender, EventArgs e)
{
if (ListBox1.SelectedItem != null)
{
int index = ListBox1.SelectedIndex;
int count = ListBox1.Items.Count;

//检查该 Catalog 下是否有 Link
bool goon = true;
goon = !checkSubLink(ListBox1.SelectedValue); //下有 Link 则返回真,注意前面有个"!",有则不继续

if (goon)
{
//操作
SqlDataSource1.DeleteParameters["ID"].DefaultValue = ListBox1.SelectedItem.Value;
SqlDataSource1.Delete();

//设置selected
if (index < count - 1) //删的不是最末项
{
ListBox1.SelectedIndex = index;
}
if (index == count - 1 && index != 0) //删的是最末项,并且不是最首项
{
ListBox1.SelectedIndex = index - 1;
}
if (index == count - 1 && index == 0) //删的是最末项,并且是最首项
{
//不设索引
}
}
else
{
Label_alert.Text = "该节点下面存在Link(s)，请删除后再删除该节点！";
}
}
}

IEnumerator SessionEnum = Session.Keys.GetEnumerator();
while (SessionEnum.MoveNext())
{
    Label1.Text += Session[SessionEnum.Current.ToString()].ToString() + "
";
}

DataView dv1 = dt1.DefaultView;
dv1.Sort = "xTime DESC";//根据时间逆序
dt1 = dv1.ToTable();

另外，.ToTable()方法有多种重载，常用的是：

dv1.ToTable(true, "ID", "title", "xTime");//过滤重复

代码非常简洁

(一) . 运行示例图

 1. 待导出数据的GridView图:

2. 生成的Excel文件

(二). 代码

 1. 前台页面 GridViewToExcelFile.aspx 代码: