detailsview
时间: 2023-04-25 21:04:07 浏览: 61
DetailsView是ASP.NET Web Forms中的一个控件,用于显示单个数据项的详细信息。它通常与数据源控件(如SqlDataSource)一起使用,以便从数据库中检索数据并将其显示在DetailsView中。DetailsView可以自动为每个字段生成标签和值,也可以自定义其外观和行为。它还提供了一些事件,以便在用户与控件交互时执行自定义逻辑。
相关问题
asp.net中detailview的deleteCommand
在 ASP.NET 中,可以使用 `DetailsView` 控件来显示单个记录的详细信息,并提供编辑和删除记录的功能。要实现 `DetailsView` 的删除功能,需要为 `DeleteCommand` 事件提供处理程序。
以下是一个示例 `DetailsView` 控件,其中包含一个删除按钮和 `DeleteCommand` 事件的处理程序:
```aspx
<asp:DetailsView ID="DetailsView1" runat="server" AutoGenerateRows="False" DataKeyNames="ID"
DataSourceID="SqlDataSource1">
<Fields>
<asp:BoundField DataField="ID" HeaderText="ID" ReadOnly="True" SortExpression="ID" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
<asp:CommandField ShowDeleteButton="True" />
</Fields>
</asp:DetailsView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
DeleteCommand="DELETE FROM [Table] WHERE [ID] = @ID" SelectCommand="SELECT * FROM [Table]">
<DeleteParameters>
<asp:Parameter Name="ID" Type="Int32" />
</DeleteParameters>
</asp:SqlDataSource>
```
在上面的示例中,`DetailsView` 控件绑定到一个名为 `SqlDataSource1` 的数据源,该数据源指定了 `DeleteCommand` SQL 命令和参数。当用户单击删除按钮时,`DetailsView` 控件将触发 `DeleteCommand` 事件,并将 `ID` 参数传递给 `SqlDataSource1` 数据源。数据源将使用 `DELETE` 命令从数据库中删除该记录。
您还可以在 `DeleteCommand` 事件处理程序中编写自定义代码来执行删除操作,而不是使用数据源的 SQL 命令。例如,下面是一个示例 `DeleteCommand` 事件处理程序,它使用自定义代码从数据库中删除记录:
```csharp
protected void DetailsView1_DeleteCommand(object sender, DetailsViewCommandEventArgs e)
{
int id = Convert.ToInt32(DetailsView1.DataKey.Value);
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
SqlCommand command = new SqlCommand("DELETE FROM [Table] WHERE [ID] = @ID", connection);
command.Parameters.AddWithValue("@ID", id);
connection.Open();
int rowsAffected = command.ExecuteNonQuery();
connection.Close();
if (rowsAffected > 0)
{
// Record deleted successfully
}
else
{
// Failed to delete record
}
}
}
```
在上面的示例中,`DetailsView1_DeleteCommand` 方法从 `DetailsView1` 控件的 `DataKey` 属性中获取要删除的记录的 ID,然后使用 ADO.NET 执行 `DELETE` 命令从数据库中删除该记录。方法还检查受影响的行数来确定是否成功删除记录,并在必要时提供反馈。
使用Details View控件编辑数据的代码
以下是使用 Details View 控件编辑数据的代码示例:
1. 绑定数据源
```C#
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string query = "SELECT * FROM Customers WHERE CustomerID = @CustomerID";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@CustomerID", Request.QueryString["CustomerID"]);
SqlDataAdapter adapter = new SqlDataAdapter(command);
DataSet dataSet = new DataSet();
adapter.Fill(dataSet, "Customers");
DetailsView1.DataSource = dataSet.Tables["Customers"];
DetailsView1.DataBind();
}
}
```
2. 编辑数据
```C#
protected void DetailsView1_ItemUpdating(object sender, DetailsViewUpdateEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string query = "UPDATE Customers SET ContactName = @ContactName, ContactTitle = @ContactTitle, Phone = @Phone WHERE CustomerID = @CustomerID";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@ContactName", e.NewValues["ContactName"]);
command.Parameters.AddWithValue("@ContactTitle", e.NewValues["ContactTitle"]);
command.Parameters.AddWithValue("@Phone", e.NewValues["Phone"]);
command.Parameters.AddWithValue("@CustomerID", Request.QueryString["CustomerID"]);
connection.Open();
command.ExecuteNonQuery();
connection.Close();
DetailsView1.ChangeMode(DetailsViewMode.ReadOnly);
e.Cancel = true;
}
```
3. 插入数据
```C#
protected void DetailsView1_ItemInserting(object sender, DetailsViewInsertEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string query = "INSERT INTO Customers (CustomerID, CompanyName, ContactName, ContactTitle, Phone) VALUES (@CustomerID, @CompanyName, @ContactName, @ContactTitle, @Phone)";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@CustomerID", e.Values["CustomerID"]);
command.Parameters.AddWithValue("@CompanyName", e.Values["CompanyName"]);
command.Parameters.AddWithValue("@ContactName", e.Values["ContactName"]);
command.Parameters.AddWithValue("@ContactTitle", e.Values["ContactTitle"]);
command.Parameters.AddWithValue("@Phone", e.Values["Phone"]);
connection.Open();
command.ExecuteNonQuery();
connection.Close();
DetailsView1.ChangeMode(DetailsViewMode.ReadOnly);
e.Cancel = true;
}
```
4. 删除数据
```C#
protected void DetailsView1_ItemDeleting(object sender, DetailsViewDeleteEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
string query = "DELETE FROM Customers WHERE CustomerID = @CustomerID";
SqlConnection connection = new SqlConnection(connectionString);
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@CustomerID", Request.QueryString["CustomerID"]);
connection.Open();
command.ExecuteNonQuery();
connection.Close();
Response.Redirect("Customers.aspx");
e.Cancel = true;
}
```
以上代码示例仅供参考,具体实现需要根据您的实际情况进行调整。