Question

我有一个从具有特定值的SqlDataSource填充的GridView。

如何在myGridView的顶部添加默认行？

我希望默认行包含文本'All'

<asp:GridView ID="gvPoints"
    runat="server"
    DataSourceID="SqlDataSource_userPoints"
    AllowPaging="True"
    AutoGenerateColumns="False"
    DataKeyNames="id_point,title"
    BorderWidth="0px"
    Width="100%"
    GridLines="None">

    <Columns>
        <asp:ButtonField
            CommandName="selectedPoint"
            DataTextField="title"
            ButtonType="Link" />
    </Columns>

    <RowStyle HorizontalAlign="Left"></RowStyle>
</asp:GridView>



<asp:SqlDataSource 
    ID="SqlDataSource_userPoints" 
    runat="server" 
    ConnectionString='<%$ ConnectionStrings:TipTourConnectionString %>' 
    SelectCommand ="SELECT 
                        id_point, 
                        title, 
                        body

                    FROM tt_point

                    WHERE id_user = @id_user">

    <SelectParameters>
        <asp:QueryStringParameter 
            QueryStringField="id_user" 
            DefaultValue="0" 
            Name="id_user">
        </asp:QueryStringParameter>
    </SelectParameters>
</asp:SqlDataSource>

Answer 1

我认为在这种情况下最简单的方法是使用SQL语句添加它。

这假定id_point是一个数字字段。如果没有，请删除转换功能

SELECT 'All' AS id_point, 'All' AS title, 'All' AS body
UNION
SELECT CONVERT(varchar, id_point), title, body FROM tt_point WHERE id_user = @id_user

Answer 2

替换此

<asp:ButtonField CommandName="selectedPoint" DataTextField="title" ButtonType="Link" />

用这个

<asp:ButtonField CommandName="selectedPoint" DataTextField="title" ButtonType="Link" HeaderText="All" />

我已将HeaderText="All"添加到您的ButtonField 确保您的gridview中有ShowHeader="true"

如果你想添加2行，请像这样绑定你的gridview

strcon = "data source=.\\SQLEXPRESS;database=testDB;trusted_Connection=yes";    
private void BindGridData()
    {
        SqlConnection connection = new SqlConnection(strcon);
        SqlCommand command = new SqlCommand("SELECT id_point,title,body FROM tt_point WHERE id_user = @id_user", connection);
        string userid = "0";
        command.Parameters.AddWithValue("@id_user", userid);
        SqlDataAdapter daimages = new SqlDataAdapter(command);
        DataTable dt = new DataTable();
        daimages.Fill(dt);
        DataRow dr = dt.NewRow();
        dr["id_point"] = "All";
        dr["title"] = "All";
        dr["body"] = "All";
        dt.Rows.InsertAt(dr, 0);
        DataRow dr1 = dt.NewRow();
        dr1["id_point"] = "All";
        dr1["title"] = "All";
        dr1["body"] = "All";
        dt.Rows.InsertAt(dr1, 1);            
        gvPoints.DataSource = dt;
        gvPoints.DataBind();
    }

像这样

在页面加载上调用此方法

protected void Page_Load(object sender, EventArgs e)
    {        
        if (!Page.IsPostBack)
        {
            BindGridData();
        }
    }

此处strcon数据库名称testDB替换为您的数据库名称

从gridview中删除 DataSourceID =“SqlDataSource_userPoints”

将默认行添加到ASP.NET GridView的顶部

2 个答案: