Question

我正在尝试使用带有两个文本框的AjaxToolKit CalendarExtender控件来开发搜索过滤器。第一个TextBox用于（startdate），第二个TextBox用于完成日期，单击（搜索）按钮后，结果应显示在ListView中，并在ListView的第一列添加一个复选框。

仅供参考，数据库设计如下：

Employee Table: Username, Name...
SuggestionsLog: ID, Title, Description, DateSubmitted, StatusID
SuggestionsStatus: ID, Status

（DateSubmitted是一个datetime数据类型字段）

StartDate和EndDate将基于数据库中SuggestionsLog表中的DateSubmitted列。 问题是从Ajax CalendarExtender中选择的日期的格式是（2012年7月2日）。另外，我写的查询是：

SELECT     dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.SafetySuggestionsLog.Username, dbo.SafetySuggestionsLog.DateSubmitted, 
                      dbo.SafetySuggestionsStatus.Status
FROM         dbo.SafetySuggestionsLog INNER JOIN
                      dbo.SafetySuggestionsStatus ON dbo.SafetySuggestionsLog.StatusID = dbo.SafetySuggestionsStatus.ID
WHERE     (dbo.SafetySuggestionsLog.DateSubmitted = @startDate) AND (dbo.SafetySuggestionsLog.DateSubmitted = @finishDate)

我想在ListView中显示结果，但是，ListView上没有显示任何内容，我不知道为什么。 你可以帮我解决这个问题吗？

ASP.NET：

<div>
                    <asp:Label ID="Label2" runat="server" Text="From: " />
                    <asp:TextBox ID="txtStartDate" runat="server" />
                    <asp:CalendarExtender ID="CalendarExtender1" runat="server" Enabled="True" 
                        Format="MMMM d, yyyy" TargetControlID="txtStartDate">
                    </asp:CalendarExtender>

                    <asp:Label ID="Label3" runat="server" Text="To: " />
                    <asp:TextBox ID="txtEndDate" runat="server" /> 
                    <asp:CalendarExtender ID="CalendarExtender2" runat="server" Enabled="True" 
                        Format="MMMM d, yyyy" TargetControlID="txtEndDate">
                    </asp:CalendarExtender>
                    <asp:Button ID="searchButton" runat="server" Text="Search" 
                        onclick="searchButton_Click" />

                    <asp:ListView ID="FilteredSuggestions" runat="server"></asp:ListView>
                </div>

代码隐藏：

protected void searchButton_Click(object sender, EventArgs e)
    {
        string connString = ConfigurationManager.ConnectionStrings["testConnectionString"].ConnectionString;
        SqlConnection conn = new SqlConnection(connString);
        string cmd = @"SELECT     dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.SafetySuggestionsLog.Username, dbo.SafetySuggestionsLog.DateSubmitted, 
                                 dbo.SafetySuggestionsStatus.Status
                        FROM         dbo.SafetySuggestionsLog INNER JOIN
                                    dbo.SafetySuggestionsStatus ON dbo.SafetySuggestionsLog.StatusID = dbo.SafetySuggestionsStatus.ID
                        WHERE     (dbo.SafetySuggestionsLog.DateSubmitted = @startDate) AND (dbo.SafetySuggestionsLog.DateSubmitted = @finishDate)";

        SqlDataAdapter sda = new SqlDataAdapter(cmd,conn);
        sda.SelectCommand.Parameters.AddWithValue("@startDate", txtStartDate.Text);
        sda.SelectCommand.Parameters.AddWithValue("@finishDate", txtEndDate.Text);
        DataSet ds = new DataSet();
        sda.Fill(ds, "table");

        FilteredSuggestions.DataSource = ds.Tables["table"];
        FilteredSuggestions.DataBind();
    }

Answer 1

试试这个：

使用BETWEEN指定日期范围

SELECT     dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.SafetySuggestionsLog.Username, dbo.SafetySuggestionsLog.DateSubmitted, 
                      dbo.SafetySuggestionsStatus.Status
FROM         dbo.SafetySuggestionsLog INNER JOIN
                      dbo.SafetySuggestionsStatus ON dbo.SafetySuggestionsLog.StatusID = dbo.SafetySuggestionsStatus.ID
WHERE     (dbo.SafetySuggestionsLog.DateSubmitted Between @startDate AND @finishDate)

Answer 2

BETWEEN假设当天开始的午夜：

T-SQL Between Dates Confusion

因此它将有效排除 @finishDate。如果您使用'Between'运算符，请注意这一点。如果这不是您想要的，请在建立时间窗口时使用'<', '>', '<=', '>='运算符。

WHERE (NOT((finishDate <= @startDate) OR (startDate > @finishDate)))

如何根据ListView中的两个日期显示搜索结果？

2 个答案: