Question

在使用asp.net中的存储过程实现动态搜索时遇到问题我有一个数据表和数据库的考勤系统我想搜索一个员工的主要控制，如他的ID和日期，设备类型......等这是我的Default.aspx.cs代码

public partial class _Default : Page
{
    static string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;


    protected void Page_Load(object sender, EventArgs e)
    {
        if (IsPostBack == false)
        {
            this.gridData();
            this.search();
        }
    }
    //--------------------------------------------------
    private void gridData()
    {
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT EventUserId, EventDate, EventTime, Eventtype, Readerid FROM V_EventLogs"))
            {
                using (SqlDataAdapter sda = new SqlDataAdapter())
                {
                    DataTable dt = new DataTable();
                    cmd.Connection = con;
                    sda.SelectCommand = cmd;
                    sda.Fill(dt);
                    GridView1.DataSource = dt;
                    GridView1.DataBind();

                }
            }
        }
    }

    private DataTable search()
    {
        DataTable sdt = new DataTable();
        SqlConnection con = new SqlConnection(constr);
        try
        {

            SqlCommand cmd = new SqlCommand("userSearch", con);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandTimeout = 300;
            cmd.Parameters.AddWithValue("@EventUserId", TextBox1.Text);
            cmd.Parameters.AddWithValue("@EventDateFrm", ASPxDateEdit1.Text);
            cmd.Parameters.AddWithValue("@EventDateTo", ASPxDateEdit2.Text);
            cmd.Parameters.AddWithValue("@Readerid", txtReader.Text);
            con.Open();
            cmd.ExecuteNonQuery();
            con.Close();

            // passs parameter to data adapter
            SqlDataAdapter sda = new SqlDataAdapter(cmd);

            sda.Fill(sdt);

        }
        catch (Exception ex)            {
            Response.Write(ex);
        }

        return sdt;
    }



   //---------------------------------------------------


    protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        this.gridData();
    }

    protected void btnSearch_Click(object sender, EventArgs e)
    {    
        GridView1.DataSource = search();
        GridView1.DataBind();
    }

}

}

这是我的Default.aspx页面：

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>

<div class="jumbotron">
    <h1>BioWeb TimeTel</h1>
    <p class="lead">Time Attendance</p>
    <%--<p><a href="http://www.asp.net" class="btn btn-primary btn-lg">Learn more &raquo;</a></p>--%>
</div>
<div>

        User ID:
        &nbsp;<asp:TextBox ID="TextBox1" runat="server" CssClass="form-control"></asp:TextBox>
        &nbsp;
        <br />
        <br />
        Event Date:
        &nbsp;&nbsp;
        <br />
        <dx:ASPxDateEdit ID="ASPxDateEdit1" runat="server" DisplayFormatString="MM/dd/yyyy" EditFormatString="MM/dd/yyyy">
        </dx:ASPxDateEdit>
        <br />
        Event Time:
        <br />
        &nbsp;<dx:ASPxDateEdit ID="ASPxDateEdit2" runat="server" DisplayFormatString="MM/dd/yyyy" EditFormatString="MM/dd/yyyy">
        </dx:ASPxDateEdit>
        &nbsp;
        <br />
        <br />
        Reader:
        &nbsp;<asp:TextBox ID="txtReader" runat="server" CssClass="form-control" AutoCompleteType="Disabled"></asp:TextBox>
        &nbsp;
        <br />
        <br />
        &nbsp
        <br />
        <br />
        <asp:Button ID="btnSearch" runat="server" Text="Search" OnClick="btnSearch_Click" CssClass="btn btn-primary btn-lg" OnLoad="Page_Load" />
        <br />
        <br />
        <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true"
        OnPageIndexChanging="OnPageIndexChanging" PageSize="10" UseAccessibleHeader="True" CssClass="table table-hover">
        <Columns>
            <asp:BoundField DataField="EventUserId" HeaderText="User ID" />
            <asp:BoundField DataField="EventDate" HeaderText="Date IN" />
            <asp:BoundField DataField="EventTime" HeaderText="Time IN" />
            <asp:BoundField DataField="Eventtype" HeaderText="Type" />
            <asp:BoundField DataField="Readerid" HeaderText="Reader" />

        </Columns>
    </asp:GridView>     
    </div>

我存储的程序是：

CREATE procedure userSearch
(
@EventUserId int = NULL,
@EventDateFrm nvarchar(10) = NULL,
@EventDateTo nvarchar(10) = NULL,
@Readerid int = NULL
)
as
select V_EventLogs.EventUserId,V_EventLogs.EventDate,V_EventLogs.EventTime,V_EventLogs.Eventtype,V_EventLogs.Readerid 
from V_EventLogs 
where
(@EventUserId is NULL OR EventUserId = @EventUserId )
AND
(@EventDateFrm is NULL OR Convert(varchar(10),EventDate,110) >= Convert(varchar(10),@EventDateFrm,110))
AND 
(@EventDateTo is NULL OR Convert(varchar(10),EventDate,110)  <= Convert(varchar(10),@EventDateTo,110))
AND
(@Readerid is NULL OR Readerid = @Readerid)

现在当我想搜索一个员工时，网格数据表仍然是空的并且没有获得任何值但是在SQL服务器上测试我的存储过程时工作正常 - 第二个问题是当我选择任何其他页面搜索实现不起作用时，分页数据表动态搜索仅适用于第一页，数据表显示所有数据库值！为什么??

Answer 1

我建议您仅在填充命令后关闭连接，并且不要调用ExecuteNonQuery，如下所示：

    SqlCommand cmd = new SqlCommand("userSearch", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandTimeout = 300;
    cmd.Parameters.AddWithValue("@EventUserId", TextBox1.Text);
    cmd.Parameters.AddWithValue("@EventDateFrm", ASPxDateEdit1.Text);
    cmd.Parameters.AddWithValue("@EventDateTo", ASPxDateEdit2.Text);
    cmd.Parameters.AddWithValue("@Readerid", txtReader.Text);

    // passs parameter to data adapter
    SqlDataAdapter sda = new SqlDataAdapter(cmd);

    con.Open();
    sda.Fill(sdt);
    con.Close();

如果您希望使用DataAdapter，请执行此操作。否则，您可以直接检索数据：

    SqlCommand cmd = new SqlCommand("userSearch", con);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.CommandTimeout = 300;
    cmd.Parameters.AddWithValue("@EventUserId", TextBox1.Text);
    cmd.Parameters.AddWithValue("@EventDateFrm", ASPxDateEdit1.Text);
    cmd.Parameters.AddWithValue("@EventDateTo", ASPxDateEdit2.Text);
    cmd.Parameters.AddWithValue("@Readerid", txtReader.Text);

    con.Open();
    var reader = cmd.ExecuteReader();
    var dtbl = new DataTable();
    dtbl.Load(reader);
    con.Close();

当然最好将所有内容放入try-catch中并使用＆＃34;使用＆＃34; .....： - ）

Answer 2

答案在你的问题中。您没有在PageIndexChanging ...

中进行任何搜索

protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    this.gridData();
}

上面的代码只是简单地重新绑定整个数据，因为你的gridData（）方法检索所有记录，设置NewPageIndex只会将你移动到那个页面。

尝试写下面的内容：

protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        GridView1.DataSource = search();
    }

这不是一个完美的解决方案。应该使用存储过程本身实现的分页;此SP应将页面索引和每页的记录数与其他搜索条件一起作为输入;您需要构建一个动态SQL以在SP中获取相应的页面结果并将其绑定回Grid。简单的Google搜索可能会为您提供其他解决方案。但是，上述变化应该符合您的要求。

Answer 3

您可以创建动态搜索SQL Server存储过程

Create PROCEDURE CUSTOMER.GET_DynamicSearch
(
    -- Optional Filters for Dynamic Search
    @CustomerID            INT = NULL,
    @CustomerName          NVARCHAR(50) = NULL,
    @CustomerTitle         NVARCHAR(50) = NULL,
    @locationId            int = NULL,
    @ControlCardNumber     bigint = NULL,
    @Formnumber            int = NULL
)
AS
BEGIN
    SET NOCOUNT ON

    DECLARE
    @lCustomerID            INT = NULL,
    @lCustomerName          NVARCHAR(50) = NULL,
    @lCustomerTitle         NVARCHAR(50) = NULL,
    @llocationId            int = NULL,
    @lControlCardNumber     bigint = NULL,
    @lFormnumber            int = NULL

    SET @lCustomerID          = @CustomerID
    SET @lCustomerName         = LTRIM(RTRIM(@CustomerName))
    SET @lCustomerTitle          = LTRIM(RTRIM(@CustomerTitle))
    SET @llocationId           = LTRIM(RTRIM(@locationId))
    SET @lControlCardNumber    = @ControlCardNumber
    SET @lFormnumber             = LTRIM(RTRIM(@Formnumber))

    SELECT
        c.CustomerId,
        c.CustomerName,
        c.CustomerTitle,
        c.LocationId,
        c.ControlCardNumber,
        c.FormNumber
    FROM CUSTOMER.Customer c
    WHERE
        (@lCustomerID IS NULL OR CustomerId = @lCustomerID)
    AND (@lCustomerName IS NULL OR CustomerName LIKE  '%' +@lCustomerName + '%')
    AND (@lCustomerTitle IS NULL OR CustomerTitle LIKE '%' + @lCustomerTitle + '%')
    AND (@llocationId IS NULL OR locationId = @llocationId )
    AND (@lControlCardNumber IS NULL OR ControlCardNumber = @lControlCardNumber)
    AND (@lFormnumber IS NULL OR Formnumber = @lFormnumber)
    ORDER BY c.CustomerID asc

END
GO

执行细节


EXEC CUSTOMER.GET_DynamicSearch -- 2000  records

- 仅提供CustomerName参数：


EXEC CUSTOMER.GET_DynamicSearch @CustomerName= 'Uttam' -- 1040 records

使用存储过程asp.net进行动态搜索

3 个答案: