单击gridview按钮后从列和行中读取数据

Question

我有一个 gridview，其中每个生成的行都有 gridview 按钮。当我单击该按钮时，它会向用户发送一封电子邮件，但我需要能够读取其中一列（WHERE 列）及其行值并将其包含在我的邮件正文中

这是我的标记代码

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"        onrowcommand="GridView1_RowCommand"
    DataSourceID="prmtest" Width="994px" BorderStyle="None" GridLines="None" 
    onselectedindexchanged="GridView1_SelectedIndexChanged" 
    HorizontalAlign="Center">
    <RowStyle ForeColor="#4D5763" HorizontalAlign="Center" />
    <Columns>
        <asp:BoundField DataField="Name_of_Training" HeaderText="Name of training" 
            SortExpression="Name_of_Training" />
        <asp:BoundField DataField="Column1" HeaderText="Date" ReadOnly="True" 
            SortExpression="Column1" />
        <asp:BoundField DataField="Start_time" HeaderText="Start time" 
            SortExpression="Start_time" />
        <asp:BoundField DataField="End_time" HeaderText="End time" 
            SortExpression="End_time" />
        <asp:BoundField DataField="Location" HeaderText="Where" 
            SortExpression="Location" />
        <asp:BoundField DataField="Seats" HeaderText="Available seats" SortExpression="Seats" />
    <asp:HyperLinkField HeaderText="Training documents" 
        NavigateUrl="url.zip" Text="Training material" Target="_self">
        <ItemStyle ForeColor="#E5003B"    Font-Underline="false"/>
    </asp:HyperLinkField>
    <asp:TemplateField ShowHeader="False">
        <ItemTemplate>
            <asp:Button ID="Button1" runat="server" CausesValidation="false" CommandName="Book"
             OnClientClick="alert('The booking will be made for?')" CommandArgument="<%#((GridViewRow)Container).RowIndex %>"
                Text="Book" />
        </ItemTemplate>
            <ControlStyle Font-Bold="False" />
    </asp:TemplateField>
    </Columns>
    <HeaderStyle ForeColor="#4D5763" BackColor="#DCDFE2" />
    <EditRowStyle Font-Underline="False" />
</asp:GridView>
&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp&nbsp
     <asp:SqlDataSource ID="prmtest" runat="server" 
         ConnectionString="<%$ ConnectionStrings:dbprmtest %>" 
         SelectCommand="SELECT [Name of Training] AS Name_of_Training, 
         CONVERT(VARCHAR(10),[Date],20), [Start time] AS Start_time, [End time] AS End_time, [Location], [Seats] FROM [Sheet1$]">
     </asp:SqlDataSource>

这是我的电子邮件代码

    if (e.CommandName == "Book")
    {
        try
        {
            MailMessage mailMessage = new MailMessage();
            mailMessage.To.Add("email@test.com");
            mailMessage.From = new MailAddress("email2@test.com");
            mailMessage.Subject = "Test";
            mailMessage.Body = "";
            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Host = "smtp.text.com;
            smtpClient.Host = "test.com";
            smtpClient.Port = 25;
            smtpClient.Credentials = new NetworkCredential("test.test", "password");
            smtpClient.Send(mailMessage);
            btnemail.Text = "E-mail  and Booking sent!";
        }
        catch (Exception ex)
        {
            Response.Write("Could not send the e-mail - error: " + ex.Message);
            lblemail.Text = "Could not send the e-mail - error: " + ex.Message;
        }
    }
}

Answer 1

有两种选择：

第一种方法是在 CommandArguement 中发送您需要的数据。喜欢：

CommandArgument='<%#((GridViewRow)Container).RowIndex.ToString() +"|" + Eval("Anything").ToString() %>'

|符号在这里用作分隔符。然后，您可以使用分隔符分割字符串，例如：

var arguements = CommandArguement.ToString().Split('|');

第二种方法是使用行索引转到该行并搜索您希望在邮件中包含的元素。

Answer 2

在您的“oncommand”事件处理程序中，首先找到包含按钮的网格行的“所有者”

Button btn = (sender as Button);
GridViewRow grv = (GridViewRow)btn.NamingContainer;

GridRowView 然后让您可以访问底层数据源中的行 (DataItemIndex)，然后您可以从下面使用任何/所有字段

DataView dview = (DataView)prmtest.Select(DataSourceSelectArguments.Empty);
string str = (string)dview[grv.DataItemIndex]["Location"];

或者，如果它确实只是您需要的位置，那么也许就这么简单。

Button btn = (sender as Button);
GridViewRow grv = (GridViewRow)btn.NamingContainer;

string str = gvAssets.Rows[grv.DataItemIndex].Cells[4].Text;   // Cell[4] being the Location Col.

HTH...