如何在gridview中使用复选框

本文关键字：复选框 gridview | 更新日期: 2023-09-27 18:08:15

我有一个asp.net表单显示从Oracle数据库的用户详细信息，使用网格视图。我甚至设法在网格视图中使用以下模板获得一个复选框字段。

    <asp:TemplateField>
    <ItemTemplate>
      <asp:CheckBox runat="server" ID="chck"/>
    </ItemTemplate>
    </asp:TemplateField>

我希望管理员能够使用复选框选择多个条目，并对它们执行一定的操作。对于删除操作，我尝试使用以下

for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            if (Convert.ToBoolean(GridView1.Rows[i].Cells[1].Value == true))
                GridView1.Rows.RemoveAt[i];
        }
然而，这显示了一个错误。显然，每行上的每个复选框都必须有自己唯一的索引。我怎么去那儿?任何形式的帮助都会很感激。谢谢:)

如何在gridview中使用复选框

你需要使用findControl在gridview行中找到控件

for (int i = 0; i < GridView1.Rows.Count; i++)
{
     CheckBox cb1 = (CheckBox)GridView1.Rows[i].FindControls("chck");
        if(cb1.Checked)
            GridView1.Rows.RemoveAt[i];
}

使用查找控件获取复选框:

for (int i = 0; i < GridView1.Rows.Count; i++)
   {
        CheckBox chck = (CheckBox)GridView1.Rows[i].FindControl("chck");
       if (chck  != null)
       {
         if (chck.Checked)
         {
            GridView1.Rows.RemoveAt[i];
         }
       }
  }

这是Aspx文件:

  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
    BackColor="White" BorderColor="#336699" BorderStyle="Solid" BorderWidth="1px"  
    CellPadding="0" CellSpacing="0" DataKeyNames="CategoryID" Font-Size="10"
    Font-Names="Arial" GridLines="Vertical" Width="40%">
            <Columns>            
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:CheckBox ID="chkStatus" runat="server"
                            AutoPostBack="true" OnCheckedChanged="chkStatus_OnCheckedChanged"
                            Checked='<%# Convert.ToBoolean(Eval("Approved")) %>'
                            Text='<%# Eval("Approved").ToString().Equals("True") ? " Approved " : " Not Approved " %>' />
                    </ItemTemplate>                   
                </asp:TemplateField>
                <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />                   
                <asp:BoundField DataField="CategoryName" HeaderText="CategoryName"  />
            </Columns>
    <HeaderStyle BackColor="#336699" ForeColor="White" Height="20" />
</asp:GridView>

这是CS文件:

protected void Page_Load(object sender, EventArgs e)
{
  if (!Page.IsPostBack)
  {
    LoadData();
  }
}
private void LoadData()
{
  string constr = @"Server=.'SQLEXPRESS;Database=TestDB;uid=waqas;pwd=sql;";
  string query = @"SELECT CategoryID, CategoryName, Approved FROM Categories";
  SqlDataAdapter da = new SqlDataAdapter(query, constr);
  DataTable table = new DataTable();
  da.Fill(table);
  GridView1.DataSource = table;
  GridView1.DataBind();
}
public void chkStatus_OnCheckedChanged(object sender, EventArgs e)
{
    CheckBox chkStatus = (CheckBox)sender;
    GridViewRow row = (GridViewRow)chkStatus.NamingContainer;

    string cid = row.Cells[1].Text;
    bool status = chkStatus.Checked;

    string constr = @"Server=.'SQLEXPRESS;Database=TestDB;uid=waqas;pwd=sql;";
    string query = "UPDATE Categories SET Approved = @Approved WHERE CategoryID = @CategoryID";
    SqlConnection con = new SqlConnection(constr);
    SqlCommand com = new SqlCommand(query, con);

    com.Parameters.Add("@Approved", SqlDbType.Bit).Value = status;
    com.Parameters.Add("@CategoryID", SqlDbType.Int).Value = cid;

    con.Open();
    com.ExecuteNonQuery();
    con.Close();
    LoadData();
}
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