Question

网络应用程序，我需要根据某些选项＆gt;

过滤gridview

数据库包含以下表格：

***********************************
user           *  warning
***********************************
id             *   id
firstname      *   user_id
lastname       *   type
fathername     *   content
               *   title
               *   date
               *   writer1
               *   writer2
               *   committeecoordinator
               *   youthcoordinator

user.id = warning.user_id 我需要根据4个选项进行过滤：

类型的下拉列表来自用户的名字+父名+姓氏的下拉列表日期的文本框标题的文本框

我需要网格视图来显示所有信息，在更改选项之后，它会使用验证选项的新记录重新绑定

我写这些查询：

        SELECT 
    warning.id, warning.user_id, warning.type, warning.title, warning.xcontent, 
warning.xdate, warning.writer1, warning.writer2, warning.committeecoordinator, 
warning.youthcoordinator, 
user.firstname + ' ' + user.fathername + ' ' + user.lastname AS name 
FROM warning INNER JOIN user ON warning.user_id = user.id

但不知道如何将过滤器添加到此查询

我试图添加warning.type=@warning但不起作用的地方

选项代码：

<table align="right" cellpadding="7px">
                <tr>
                    <td align="left">
                        <span class="brownfont">name</span>
                    </td>
                    <td>
                        <asp:DropDownList ID="userlist" CssClass="select" runat="server" DataSourceID="userdatasource" DataTextField="name" DataValueField="id">
                            <asp:ListItem Text="" />
                        </asp:DropDownList>
                        <asp:SqlDataSource ID="userdatasource" runat="server" ConnectionString="<%$ ConnectionStrings:samy_sarc %>" SelectCommand="SELECT id, (firstname +' '+fathername+' ' +lastname) AS name FROM sarcuser"></asp:SqlDataSource>
                    </td>
                    <td width="70px">
                    </td>
                    <td align="left">
                        <span class="brownfont">type<span>
                    </td>
                    <td>
                        <asp:DropDownList ID="type" CssClass="select" runat="server">
                        </asp:DropDownList>
                    </td>
                </tr>
                <tr>
                    <td align="left">
                        <span class="brownfont">title</span>
                    </td>
                    <td>
                        <asp:TextBox ID="title" CssClass="textfield" runat="server"></asp:TextBox>
                    </td>
                    <td width="70px">
                    </td>
                    <td align="left">
                        <span class="brownfont">date</span>
                    </td>
                    <td>
                        <asp:TextBox ID="xdate" CssClass="NjmeDine_Date textfield" runat="server"></asp:TextBox>
                    </td>
                </tr>
                <tr>
                    <td colspan="5" align="left">
                        <asp:Button class="button" ID="filter" runat="server" Text="seach" OnClick="filter_Click" />
                    </td>
                </tr>
            </table>


<asp:SqlDataSource ID="warningdatasource" runat="server" ConnectionString="<%$ ConnectionStrings:samy_sarc %>" DeleteCommand="DELETE FROM sarcwarning WHERE (id = @id)" SelectCommand="SELECT sarcwarning.id, sarcwarning.user_id, sarcwarning.type, sarcwarning.title, sarcwarning.xcontent, sarcwarning.xdate, sarcwarning.writer1, sarcwarning.writer2, sarcwarning.committeecoordinator, sarcwarning.youthcoordinator, sarcuser.firstname + ' ' + sarcuser.fathername + ' ' + sarcuser.lastname AS name FROM sarcwarning INNER JOIN sarcuser ON sarcwarning.user_id = sarcuser.id ">
    <DeleteParameters>
        <asp:Parameter Name="id" />
    </DeleteParameters>
    <SelectParameters>
        <asp:ControlParameter ControlID="userlist" DefaultValue="%" Name="user_id" PropertyName="SelectedValue" />
        <asp:ControlParameter ControlID="title" DefaultValue="%" Name="title" PropertyName="Text" />
        <asp:ControlParameter ControlID="type" DefaultValue="%" Name="type" PropertyName="SelectedValue" />
        <asp:ControlParameter ControlID="xdate" DefaultValue="%" Name="xdate" PropertyName="Text" />
    </SelectParameters>
</asp:SqlDataSource>

请你帮帮我

Answer 1

编辑：您希望在页面加载中显示GridView中的所有数据。所以你应该删除所有来自SqlDataSource的SelectParameters并更改SelectCommand。您的SqlDataSource应如下所示：

<asp:SqlDataSource ID="warningdatasource" runat="server" 
    ConnectionString="<%$ ConnectionStrings:samy_sarc %>" 
    ProviderName="<%$ ConnectionStrings:samy_sarc.ProviderName %>"  
    DeleteCommand="DELETE FROM warning WHERE (id = @id)" 
    SelectCommand= "SELECT w.id, w.user_id, w.type, w.title, w.content, w.date, w.writer1, 
                         w.writer2, w.committeecoordinator, w.youthcoordinator, 
                         u.firstname + ' ' + u.fathername + ' ' + u.lastname AS name 
                        FROM warning w
                        INNER JOIN [user] u ON w.user_id = u.id"
    >
    <DeleteParameters>
        <asp:Parameter Name="id" />
    </DeleteParameters>
</asp:SqlDataSource>

请记住，在页面加载中，这将被执行，而不需要在任何地方调用它。

现在，在过滤器按钮上单击，您要过滤记录。我有以下代码：

protected void filter_Click(object sender, EventArgs e)
{
    Filter();
}

protected void Filter()
{
        warningdatasource.SelectCommand= @"SELECT w.id, w.user_id, w.type, w.title, w.content, w.date, w.writer1, 
                    w.writer2, w.committeecoordinator, w.youthcoordinator, 
                    u.firstname + ' ' + u.fathername + ' ' + u.lastname AS name 
                FROM warning w
                INNER JOIN [user] u ON w.user_id = u.id
                Where u.id = @user_id
                AND w.type = @type
                AND w.title = @title
                AND w.date = @xdate";
        if (warningdatasource.SelectParameters.Count > 0)
        {
            warningdatasource.SelectParameters["user_id"].DefaultValue = userlist.SelectedValue;
            warningdatasource.SelectParameters["type"].DefaultValue = type.SelectedValue;
            warningdatasource.SelectParameters["title"].DefaultValue = title.Text;
            warningdatasource.SelectParameters["xdate"].DefaultValue = xdate.Text;
        }
        else
        {
            warningdatasource.SelectParameters.Add("user_id", TypeCode.Int32, userlist.SelectedValue);
            warningdatasource.SelectParameters.Add("type", TypeCode.Int32, type.SelectedValue);
            warningdatasource.SelectParameters.Add("title", TypeCode.String, title.Text);
            warningdatasource.SelectParameters.Add("xdate", TypeCode.DateTime, xdate.Text);
        }
}

现在我得到了预期的结果： enter image description here

您可以下载我的测试项目here。

Answer 2

我在代码中发现了错误：问题是我比较user_id从数据库（int）和控制选择值（字符串）

所以正确的解决方案是：

其中（user_id +''喜欢@id）

        <asp:SqlDataSource ID="warningdatasource" runat="server" 
    ConnectionString="<%$ ConnectionStrings:samy_sarc %>" 
    ProviderName="<%$ ConnectionStrings:samy_sarc.ProviderName %>"  
    DeleteCommand="DELETE FROM sarcwarning WHERE (id = @id)" 
    SelectCommand= "SELECT w.id, w.user_id, w.type, w.title, w.xcontent, w.xdate, w.writer1, w.writer2, w.committeecoordinator, w.youthcoordinator, u.firstname + ' ' + u.fathername + ' ' + u.lastname AS name FROM sarcwarning AS w INNER JOIN sarcuser AS u ON w.user_id = u.id WHERE (w.user_id +'' like @user_id) AND (w.type like @type) AND (w.title like @title) AND (w.xdate like @xdate)"
    >
    <DeleteParameters>
        <asp:Parameter Name="id" />
    </DeleteParameters>
            <SelectParameters>
                <asp:ControlParameter ControlID="userlist" DefaultValue="%" Name="user_id" PropertyName="SelectedValue" />
                <asp:ControlParameter ControlID="type" DefaultValue="%" Name="type" PropertyName="SelectedValue" />
                <asp:ControlParameter ControlID="title" DefaultValue="%" Name="title" PropertyName="Text" />
                <asp:ControlParameter ControlID="xdate" DefaultValue="%" Name="xdate" PropertyName="Text" />
            </SelectParameters>
</asp:SqlDataSource>

惊人的ASP

选择查询以根据选项asp.net过滤gridview

2 个答案: