Question

我有一个下拉列表，该列表由数据库中表的名称填充。然后当管理员选择或单击表名时。下面的gridview由表中的数据填充。管理员应该能够编辑，更新，删除和选择。但是，gridview提供的命令不起作用。单击编辑时，它不会执行。然后当您单击“选择”时，它将删除。这些命令在某个地方混淆了。所以我将命令更改为模板，以便我自己编写代码。然而，网上找到的解决方案不起作用。因为一个

Gridview不仅显示来自一个表的数据，而且显示多个，因此我不能在我的查询中具体删除某个表的行，但只是说我想删除表中显示的行。这适用于所有其他事件
类似editing GridView1.EditIndex = e.NewEditIndex的代码不起作用。它显示

System.EventArgs错误。 NewEditIndex没有扩展方法，而且是不接受System.EventArgs类型的第一个参数可能是找到。

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;

    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings ["tlcString"].ConnectionString);

    protected void DropDownList1_SelectedIndexChanged (object sender, EventArgs e)
    {
    con.Open ();
    //Populates the gridview with the selectedindex in the list. The selectedindex being the table
    SqlDataAdapter da = new SqlDataAdapter(string.Format ("Select * From {0}", drpTable.SelectedValue), con);
    DataSet ds = new DataSet ();
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
    da.Fill(ds);

    GridView1.DataSource = ds. Tables [0];
    GridView1.DataBind ();
    con.Close ();
    }

    private void BindData ()
    {
    //Binds the data in the gridview with the database table and updating it if changes are ever made. The method is called.

    string strQuery = "Select * From {0}";
    SqlCommand cmd = new SqlCommand  (strQuery);
    GridView1.DataSource = GetData (cmd);
    GridView1.DataBind ();
    }

    private object GetData (SqlCommand cmd)
    {
    throw new NotImplentedException ();
    }

    //this is the code for the commads after l turned them into templatefields. But l only wrote code for the edit button only. It would be appreaciated if code for the other commands is supplied

    protected void LinkButton1_Click (object sender, EventArgs e)
    {
    //Set edit index
    GridView1.EditIndex = e.NewEditIndex;
    BindData ();
    }
//THATS all my code. The commands that were acting up were auto generated in the gridview properties window. 




<asp:GridView ID="GridView1" runat="server" CellPadding="4" 
ForeColor="#333333" 
GridLines="None">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField ShowHeader="False">
<EditItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" 
CommandName="Update" Text="Update"></asp:LinkButton>
&nbsp;<asp:LinkButton ID="LinkButton2" runat="server" 
CausesValidation="False" 
CommandName="Cancel" Text="Cancel"></asp:LinkButton>
</EditItemTemplate>
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" 
CommandName="Edit" Text="Edit"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" 
CommandName="Select" Text="Select"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField ShowHeader="False">
<ItemTemplate>
<asp:LinkButton ID="LinkButton3" runat="server" CausesValidation="False" 
CommandName="Delete" Text="Delete"></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" 
/>
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" 
/>
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" /></asp:GridView>

Gridview编辑，更新，删除和选择事件

0 个答案: