在 ASP.Net Gridview 控件中实现分页

Question

我有一个在页面加载时绑定的 gridview，并且我已经使用页脚行技术实现了插入。

现在我在同一个 gridview 中尝试了分页。

我没有错误，但是在页脚行的 DDL 中更改页面时，我发现所有值都重复。

在第一页，DDL 中的输出是：

MSG
PAY
BUY
LIS

如果更改页面，第二页的第二个输出是：

MSG
PAY
BUY
LIS
MSG
PAY
BUY
LIS

如果有任何建议，我将不胜感激。

谢谢！

我在 RowDataBound 中使用了这行代码：

   protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow && GridView1.EditIndex == e.Row.RowIndex)
        {
            DropDownList Area_DDL = (DropDownList)e.Row.FindControl("Area_DDL");
            Area_DDL.DataTextField = "area_name";
            Area_DDL.DataValueField = "area";
            Area_DDL.DataSource = Area();
            Area_DDL.DataBind();
            Area_DDL.Items.FindByValue((e.Row.FindControl("Area") as Label).Text).Selected = true;
        }

        if (e.Row.RowType == DataControlRowType.Footer)
        {
            DropDownList Area_DDL = (DropDownList)e.Row.FindControl("Area_DDL");
            Area_DDL.DataTextField = "area_name";
            Area_DDL.DataValueField = "area";
            Area_DDL.DataSource = Area();
            Area_DDL.DataBind();
        }

        if (e.Row.RowType == DataControlRowType.Pager)
        {
            DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages"));
            Label lblPageCount = (Label)e.Row.FindControl("lblPageCount");

            if (lblPageCount != null)
                lblPageCount.Text = GridView1.PageCount.ToString();

            for (int i = 1; i <= GridView1.PageCount; i++)
            {
                ddl.Items.Add(i.ToString());
            }

            ddl.SelectedIndex = GridView1.PageIndex;

            if (GridView1.PageIndex == 0)
            {
                ((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false;
            }

            if (GridView1.PageIndex + 1 == GridView1.PageCount)
            {
                ((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false;
            }
        }
    }

Answer 1

像这样修改你的代码，希望对你有帮助：

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    GridViewBind();
}

protected void ddlPages_SelectedIndexChanged(object sender, EventArgs e)
{
    GridViewRow gvrPager = GridView1.BottomPagerRow;
    DropDownList ddlPages = (DropDownList)gvrPager.Cells[0].FindControl("ddlPages");

    GridView1.PageIndex = ddlPages.SelectedIndex;
    GridViewBind();
}

protected void Paginate(object sender, CommandEventArgs e)
{
    int intCurIndex = GridView1.PageIndex;        

    switch (e.CommandArgument.ToString().ToLower())
    {
        case "First":
            GridView1.PageIndex = 0;                
            break;
        case "Prev":
            GridView1.PageIndex = intCurIndex - 1;
            break;
        case "Next":
            GridView1.PageIndex = intCurIndex + 1;
            break;
        case "Last":
            GridView1.PageIndex = GridView1.PageCount - 1;
            break;
    }
    GridView1.DataBind();
}


protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Pager)
    {
        DropDownList ddl = (DropDownList)(e.Row.FindControl("ddlpages"));
        Label lblPageCount = (Label)e.Row.FindControl("lblPageCount");

        if (lblPageCount != null)
        {
            lblPageCount.Text = GridView1.PageCount.ToString();

            for (int i = 1; i <= GridView1.PageCount; i++)
            {
                ddl.Items.Add(i.ToString());
            }

            ddl.SelectedIndex = GridView1.PageIndex;

            if (GridView1.PageIndex == 0)
            {
                ((ImageButton)e.Row.FindControl("ImageButton1")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton2")).Visible = false;
            }

            if (GridView1.PageIndex + 1 == GridView1.PageCount)
            {
                ((ImageButton)e.Row.FindControl("ImageButton3")).Visible = false;
                ((ImageButton)e.Row.FindControl("ImageButton4")).Visible = false;
            }
        }
    }
}