Question

所以我有一个GridView表，其中DropDownList用于更改页面大小，而Label用于显示该页面上的行数。我的问题是当页面加载时，lastRowOnPage的值为零。当我点击下拉项时，它将显示上一个选项的编号。例如，如果我从列表中选择25，则标签将显示“显示1 - 10”时应显示“显示1 - 25”。它为所有选择都做到了。

<asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" EnableViewState="True"
        OnLoad="Page_Load" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" >
        <asp:ListItem Text="10" Value="10" />
        <asp:ListItem Text="25" Value="25" />
        <asp:ListItem Text="50" Value="50" />
        <asp:ListItem Text="100" Value="100" />                       
    </asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" onSelected="onSelectedData" ... ></asp:SqlDataSource>

与此类似问题的大多数解决方案都说if（！IsNotPostBack）和DataBind（），但我在这里有。

public partial class UserControls_CQGCompanyControl : System.Web.UI.UserControl
{
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        BindGridView1();
    }
}
protected void onSelectedData(object sender, SqlDataSourceStatusEventArgs e)
{
    int startRowOnPage = (GridView1.PageIndex * GridView1.PageSize) + 1;
    int lastRowOnPage = startRowOnPage + GridView1.Rows.Count - 1;
    int totalRows = e.AffectedRows;

    Total1.Text = "Showing " + startRowOnPage.ToString() +
                  " - " + lastRowOnPage + " of " + totalRows;
}
protected void BindGridView1()   
{
try
   if (Convert.ToInt32(DropDownList1.SelectedValue) != null)
    GridView1.PageSize = Convert.ToInt32(DropDownList1.SelectedValue);

this.GridView1.DataBind();
}
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
   {
   GridView1.PageIndex = e.NewPageIndex;
   BindGridView1();
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
    BindGridView1();
}     
}

我需要做什么？请帮忙！

Answer 1

试试这个

 protected void onSelectedData(object sender, SqlDataSourceStatusEventArgs e)
 {
    int startRowOnPage = (GridView1.PageIndex * GridView1.PageSize) + 1;
       int lastRowOnPage = startRowOnPage + GridView1.PageSize - 1;
       int totalRows = e.AffectedRows;

       lastRowOnPage = totalRows < lastRowOnPage ? totalRows : lastRowOnPage;
       startRowOnPage = startRowOnPage > lastRowOnPage ? (int)(totalRows / GridView1.PageSize) * GridView1.PageSize + 1 : startRowOnPage;

       Label1.Text = "Showing " + startRowOnPage.ToString() +
                              " - " + lastRowOnPage + " of " + totalRows;
            }

DropDownList和GridView.Row.Count不能一起工作

1 个答案: