从数据库中检索值时如何动态添加gridview控件？

Question

我想从数据库中检索值并将其绑定到 gridview 中

根据我想动态添加控件的行数

代码：

在我的表格中我有 2 行，但使用下面的代码我只能得到第二行的值

protected void Gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    int rowIndex = 0;
    OleDbCommand cmd = new OleDbCommand("select activities,monday,tuesday,wednesday,thursday,friday,saturday,sunday from activity_values where week = '" + weekNumNow + "' and emp_id = (select emp_id from emp_master where username = '" + username + "')", DbConnection);
    // DbConnection.Open();
    OleDbDataReader dr1 = cmd.ExecuteReader();
    while (dr1.Read())
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //find the control
            DropDownList drop1 = e.Row.FindControl("dropActivities") as DropDownList;
            TextBox box1 = e.Row.FindControl("TextBox1") as TextBox;
            TextBox box2 = e.Row.FindControl("TextBox2") as TextBox;
            TextBox box3 = e.Row.FindControl("TextBox3") as TextBox;
            TextBox box4 = e.Row.FindControl("TextBox4") as TextBox;
            TextBox box5 = e.Row.FindControl("TextBox5") as TextBox;
            TextBox box6 = e.Row.FindControl("TextBox6") as TextBox;
            TextBox box7 = e.Row.FindControl("TextBox7") as TextBox;

            drop1.Text = dr1[0].ToString();
            box1.Text = dr1[1].ToString();
            box2.Text = dr1[2].ToString();
            box3.Text = dr1[3].ToString();
            box4.Text = dr1[4].ToString();
            box5.Text = dr1[5].ToString();
            box6.Text = dr1[6].ToString();
            box7.Text = dr1[7].ToString();
        }
        rowIndex++;
    }
}

有什么想法吗？提前致谢

Answer 1

我想从数据库中检索值并将其绑定到 gridview 中

您可以从您的存储库/DAL 中填充数据并在页面加载事件中绑定您的网格视图。您根本不必使用行 DataBound 事件，因为这将为呈现的每一行打开一个数据库连接。我认为您只看到一行，因为它是数据库返回的最后一行。一些伪代码

PageLoad()
{
   if(!Page.IsPostBack)
   { 
     PopulateMyGrid();
   }
}

private void PopulateMyGrid()
{
    DataTable myDataTable=null;
    // Your DAL code goes here (you can fill the datatable from your database)
    myGrid.DataSource = myDatatable;
    myGrid.DataBind();
}

您可以在网格视图中为文本框添加模板字段。对于每个文本框，您将指定 dataTable 列的名称，以便它自动进行数据绑定。

<asp:TemplateField>
  <ItemTemplate>
    <asp:TextBox ID="myTextBox" runat="sever" Text='<%#Bind("YourDataTableColumnName") %>' ></asp:TextBox>   
</ItemTemplate>