c# - 在 gridview 中如何为按钮使用 rowcommand 事件

Question

我在 aspx 中使用 gridview，我有两个页面，注册和 details.aspx 一旦注册完成，它应该转到 details.aspx 中的详细信息页面。我在那个 GV 中保留了一个 gridview 我应该使用行命令事件一个按钮，它应该显示学生的所有结果，编辑按钮作为所有学生的最后一列，我为此使用了项目模板。但是在行命令事件中，我不知道如果用户单击编辑它应该使用用户 ID 转到编辑页面，id 应该是中午可编辑模式，其他字段可以编辑。

细节.aspx

   <asp:GridView ID="GridView3" runat="server" CellPadding="3" ForeColor="#333333" GridLines="None" AutoGenerateColumns="false"  OnRowCommand="GridView3_RowCommand" OnSelectedIndexChanged="GridView3_SelectedIndexChanged">
     <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
         <Columns>
             <asp:BoundField DataField="UserName" HeaderText="UserName" ReadOnly="True"/>
             <asp:BoundField DataField="Password" HeaderText="Password" />
             <asp:BoundField DataField="FirstName" HeaderText="FirstName" />
             <asp:BoundField DataField="LastName" HeaderText="LastName" />
             <asp:BoundField DataField="EMail" HeaderText="Emaid-ID" />
             <asp:BoundField DataField="PhoneNo" HeaderText="Phone Number" />
             <asp:BoundField DataField="Location" HeaderText="Location" />

              <asp:TemplateField ShowHeader="False">
                <ItemTemplate>
                   <asp:Button ID="btnedit" runat="server" Text="Edit" CommandName="Edit" CommandArgument="UserName"/>
                </ItemTemplate>          
             </asp:TemplateField> 
         </Columns>
     <EditRowStyle BackColor="#999999" />
     <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
     <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
     <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
     <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
     <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
     <SortedAscendingCellStyle BackColor="#E9E7E2" />
     <SortedAscendingHeaderStyle BackColor="#506C8C" />
     <SortedDescendingCellStyle BackColor="#FFFDF8" />
     <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
 </asp:GridView>
    </div>
</form>

细节.aspx.cs

 protected void Page_Load(object sender, EventArgs e)
 {
    string connection2 = System.Web.Configuration.WebConfigurationManager.ConnectionStrings        ["connection1"].ConnectionString;
    SqlConnection con = new SqlConnection(connection2);
    con.Open();
    SqlCommand cmd = new SqlCommand("select * from User_Information", con);
    SqlDataReader rdr = cmd.ExecuteReader();
    GridView3.DataSource = rdr;
    GridView3.DataBind();
    con.Close();
}
protected void GridView3_RowCommand(object sender, GridViewCommandEventArgs e)
{

}


protected void GridView3_SelectedIndexChanged(object sender, EventArgs e)
{

}

}

Answer 1

首先，您的按钮控件 CommandArgument 属性必须在每一行中具有唯一值:

 <asp:Button ID="btnedit" runat="server" Text="Edit" CommandName="Edit" 
             CommandArgument="<%# ((GridViewRow) Container).RowIndex %>" />

然后在 GridView3_RowCommand 事件背后的代码中，您将拥有类似于以下代码的内容:

protected void GridView3_RowCommand(object sender, GridViewCommandEventArgs e)
{
    int index = 0;
    GridViewRow row;
    GridView grid = sender as GridView;

    switch (e.CommandName)
    {
        case "Edit":
            index = Convert.ToInt32(e.CommandArgument);
            row = grid.Rows[index];

            //use row to find the selected controls you need for edit, update, delete here
            // e.g. HiddenField value = row.FindControl("hiddenVal") as HiddenField;

            break;
    }
}