Question

问：我设置的dropdownlists用于过滤grid view中的数据。因此，在filter button click上，我希望它访问数据库存储过程并返回所需的数据。

到目前为止，这是我的代码。和存储过程，以及gridview的html，以防万一它也错了。 我的.cs：

 public partial class Animals : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        public string FormatURL(object strArgument)
        {

            return ("readrealimage.aspx?id=" + strArgument);

        }


        protected void btnFilter_Click(object sender, EventArgs e)
        {
            SqlConnection MyConnection = new
            SqlConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);

            SqlCommand command = new SqlCommand("sp_SearchAnimals", MyConnection);

            if (AnimalTypeDDL.Text != "Dont Mind")
            {
                AnimalTypeDDL.Text = command.Parameters["@Type_of_Animal"].Value.ToString();
            }


            if (CrossBreedDDL.Text != "Dont Mind")
            {
                CrossBreedDDL.Text = command.Parameters["@CrossBreed"].Value.ToString();
            }

            if (SexDDL.Text != "Dont Mind")
            {
                SexDDL.Text = command.Parameters["@Sex"].Value.ToString();
            }

            if (SizeDDL.Text != "Dont Mind")
            {
                SizeDDL.Text = command.Parameters["@Size"].Value.ToString();
            }

            if (AgeDDL.Text != "Dont Mind")
            {
                AgeDDL.Text = command.Parameters["@Age"].Value.ToString();
            }

            if (LocationDDL.Text != "Dont Mind")
            {
                LocationDDL.Text = command.Parameters["@Location"].Value.ToString();
            }

            if (RescueDDL.Text != "Dont Mind")
            {
                RescueDDL.Text = command.Parameters["@Name"].Value.ToString();
            }

            if (ChildrenDDL.Text != "Select one")
            {
                ChildrenDDL.Text = command.Parameters["@Children"].Value.ToString();
            }
            if (OtherCatsDDL.Text != "Select one")
            {
                OtherCatsDDL.Text = command.Parameters["@OtherCats"].Value.ToString();
            }
            if (OtherDogsDDL.Text != "Select one")
            {
                OtherDogsDDL.Text = command.Parameters["@OtherDogs"].Value.ToString();
            }

            GridView1.DataSource = ds;
            GridView1.DataBind();

            if (GridView1.Rows.Count >= 1)
            {
                Panel1.Visible = true;
                GridView1.Visible = true;
                lblMsg.Visible = false;

            }
            else if (GridView1.Rows.Count < 1)
            {
                GridView1.Visible = false;
                Panel1.Visible = false;
                lblMsg.Text = "Your search criteria returned no results.";
                lblMsg.Visible = true;
            }

            command.CommandType = CommandType.Text;
            command.Connection.Open();
            SqlDataReader MyDataReader = command.ExecuteReader();
            MyConnection.Close();

        }


        protected void buttonClear_Click(object sender, EventArgs e)
        {
            AnimalTypeDDL.Text = "Don't Mind";
            CrossBreedDDL.Text = "Don't Mind";
            SexDDL.Text = "Don't Mind";
            SizeDDL.Text = "Don't Mind";
            AgeDDL.Text = "Don't Mind";
            LocationDDL.Text = "Don't Mind";
            RescueDDL.Text = "Don't Mind";

        }
    }

我的存储过程：

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
 ALTER PROC [dbo].[sp_SearchAnimals]
 (
 @Type_of_Animal nvarchar(50),
 @CrossBreed nvarchar(50),
 @Sex nvarchar(50),
 @Size nvarchar(50),
 @Age nvarchar(50),
 @Location nvarchar(50),
 @Name nvarchar(50),
 @Children nvarchar(50),
 @OtherCats nvarchar(50),
 @OtherDogs nvarchar(50),
 @Details nvarchar(300) 
 )
 AS
BEGIn

SELECT
           AD.Location,AD.Details, R.Name,
           I.Content
FROM
   AnimalDetails As AD INNER JOIN
   Images As I ON AD.ImageId = I.ImageId,
   AnimalDetails As DA INNER JOIN RescueDetails As R ON DA.RescueId = R.RescueId 
    WHERE
   (@Type_of_Animal is NUll OR AD.Type_of_Animal = @Type_of_Animal) AND
   (@CrossBreed is null OR AD.CrossBreed = @CrossBreed) AND
   (@Sex is null or AD.Sex = @Sex) AND
   (@Size is null or AD.Size = @Size) AND
   (@Age is null or AD.Age = @Age) AND
   (@Location is null or AD.Location = @Location) AND
   (@Name is null or R.Name = @Name) AND
   (@Children is null or AD.Children = @Children) AND
   (@OtherCats is null or AD.OtherCats = @OtherCats) AND
   (@OtherDogs is null or AD.OtherDogs = @OtherDogs) AND
   (@Details is null or AD.Details = @Details) 

    END

我的.aspx：

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataSourceID="SqlDataSource1"
        OnRowDataBound="GridView1_RowDataBound" OnSelectedIndexChanged="GridView1_SelectedIndexChanged"
        AllowPaging="True" AllowSorting="True">
        <RowStyle CssClass="gridViewRowStyle" Wrap="True" />
        <HeaderStyle CssClass="gridViewHeaderStyle" Wrap="False" />
        <SelectedRowStyle Wrap="true" CssClass="gridViewSelectedRowStyle" />
        <AlternatingRowStyle CssClass="gridViewAltRowStyle" />
        <Columns>
            <asp:BoundField DataField="Type_of_Animal" HeaderText="Type_of_Animal" />
            <asp:BoundField DataField="Sex" HeaderText="Sex" SortExpression="Sex" />
            <asp:BoundField DataField="Age" HeaderText="Age" SortExpression="Age" />
            <asp:BoundField DataField="Location" HeaderText="Location" />
        </Columns>
        <FooterStyle CssClass="gridViewHeaderStyle" Wrap="False" />
        <PagerSettings Position="Bottom" />
        <PagerStyle CssClass="gridViewHeaderStyle" />
    </asp:GridView>
    <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:MyConnectionString %>"
        SelectCommand="SELECT [Type_of_Animal], [Sex], [Age], [Location]         From[AnimalDetails] ">
    </asp:SqlDataSource>
    <div style="font-family: Arial; font-size: small;">
        &nbsp;&nbsp;You are viewing page
        <%=GridView1.PageIndex + 1%>of
        <%=GridView1.PageCount%>
    </div>
    </asp:Panel>
    <asp:Label ID="lblMsg" runat="server" Text="Your search criteria did not return any Logs"
        Visible="False" CssClass="label"></asp:Label>
    </td> </tr> </table>

Answer 1

看到你的代码后，我无法找到你为SqlCommand command ResultSet分配DataSet的位置。

我的意思是DataSet ds = command.ExecuteDataSet();

之后，通过从Sql Server Management Studio传递相同的参数来检查您的存储过程是否返回任何结果。

此外，您正在使用DataReader但使用未绑定的ds进行绑定。

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1 个答案: