如何讓 ListBox 顯示來自文本框的“ID”的所有信息（ASP.NET C#）

Question

我正在處理一個項目，我想在其中顯示客戶的所有事件信息（來自數據庫）（我從文本框/用戶輸入中獲得）。

我正在努力填充 ListBox 並且不確定到目前為止我對使用“RowFilter”函數是否有正確的想法。

public partial class CustomerSurvey : System.Web.UI.Page
{
    private Incident incidentInformation;
    protected void Page_Load(object sender, EventArgs e)
    {
    }

    protected void btnGet_Incidents(object sender, EventArgs e)
    {
        incidentInformation = this.GetInfoForSelectedCustomerID();
    }

    private Incident GetInfoForSelectedCustomerID()
    {
        //get row from AccessDataSource based on value in dropdownlist
        DataView customersTable = (DataView)
            SqlDataSource2.Select(DataSourceSelectArguments.Empty);
        customersTable.RowFilter =
            "CustomerID = '" + txtCustomerID_ForIncidents + "'";
        DataRowView row = (DataRowView)customersTable[0];

        //create a new product object and load with data from row
        Incident i = new Incident();

        i.IncidentID = (int)row["IncidentID"];
        i.CustomerID = (int)row["CustomerID"];
        i.ProductCode = row["ProductCode"].ToString();
        i.TechID = (int)row["TechID"];
        i.DateOpened = (DateTime)row["DateOpened"];
        i.DateClosed = (DateTime)row["DateClosed"];
        i.Title = row["Title"].ToString();
        i.Description = row["Description"].ToString();

        return i;
    }

    private void DisplayInfo()
    {
        Incident incident = (Incident)Session["Reservation"];

        lstCustomers.Display
    }

如您所見，函數 DisplayInfo 未完成。 這是因為我不知道如何填充 ListBox。

我正在考慮的另一件事是，客戶可能會發生多起事件，我不確定我對課程的處理方法是否正確。

謝謝！

Answer 1

是否要根據 ListBox 中的 Textbox 值顯示數據庫中的數據？ 如果是這樣，您可以參考下面的代碼。 如果我誤解了您的要求，請發布有關您的要求的更多詳細信息。

Aspx,

 <asp:ListBox ID="ListBox1" runat="server"></asp:ListBox> CustomerId:<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <asp:Button ID="Button1" runat="server" Text="Button" OnClick="btnGet_Incidents" /> <asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:ThreadDemoConnectionString %>" SelectCommand="SELECT [CustomerId], [Name], [Country] FROM [Customers]"></asp:SqlDataSource>

Aspx.cs：

protected void btnGet_Incidents(object sender, EventArgs e)
{
    ListBox1.Items.Clear();
    GetInfoForSelectedCustomerID();
}

private void GetInfoForSelectedCustomerID()
{

    //get row from AccessDataSource based on value in dropdownlist
    DataView customersTable = (DataView)SqlDataSource2.Select(DataSourceSelectArguments.Empty);
    customersTable.RowFilter = "CustomerId = '" + TextBox1.Text + "'";
    DataRowView row = (DataRowView)customersTable[0];

    ListBox1.Items.Add(row["CustomerId"].ToString());
    ListBox1.Items.Add(row["Name"].ToString());
    ListBox1.Items.Add(row["Country"].ToString());

}

結果，