gridview没数据显示表头

方法一：通过Row.add()增加一新行来实现

     数据源可以是DateSet或者SqlDataSource或者别的

     public   void  NoRecordBuild(GridView gridView, DataSet ds)
     ... {
        if (ds.Tables[0].Rows.Count == 0)
        ...{
            ds.Tables[0].Rows.Add(ds.Tables[0].NewRow());
            gridView.DataSource = ds;
            gridView.DataBind();
            int columnCount = gridView.Rows[0].Cells.Count;
            gridView.Rows[0].Cells.Clear();
            gridView.Rows[0].Cells.Add(new TableCell());
            gridView.Rows[0].Cells[0].ColumnSpan = columnCount;
            gridView.Rows[0].Cells[0].Text = "No Records Found.";
        }
        else
        ...{
            gridView.DataSource = ds;
            gridView.DataBind();
        }
    }

 

方法二：通过在编辑EmptyDataTemplate(空模板)实现

             < EmptyDataRowStyle BackColor = " #507CD1 "  Font - Bold = " True "  ForeColor = " White "   />
             < EmptyDataTemplate >
                 < table >
                     < tr >
                         < td style = " width: 100px " >
                            列名1 </ td >
                         < td style = " width: 100px " >
                             列名2 </ td >
                         < td style = " width: 100px " >
                             列名3 </ td >
                     </ tr >
                 </ table >
             </ EmptyDataTemplate >

注意 要让他的样式和headrow一样

 

方法三：没有数据换一个有一行空数据的数据源

  

后台： 数据源是sqldatasource

using  System;
using  System.Data;
using  System.Configuration;
using  System.Collections;
using  System.Web;
using  System.Web.Security;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.Web.UI.WebControls.WebParts;
using  System.Web.UI.HtmlControls;
using  System.Data.SqlClient;

public   partial   class  gridview没数据显示表头_ : System.Web.UI.Page
... {
    protected void Page_Load(object sender, EventArgs e)
    ...{
        GridView1.DataSource = SqlDataSource1;//最好是在代码里绑定，这样认识的更清晰
        SqlDataSource1.SelectCommand = "SELECT [ProductID],[ProductName],[SupplierID] FROM [Alphabetical list of products]";
        GridView1.DataBind();
    }
    //没有数据换一个有一行空数据的数据源
    public void NoRecordBuild(GridView gridView, SqlDataSource sqlds)
    ...{
        SqlConnection connect = new SqlConnection(sqlds.ConnectionString);

        connect.Open();
        DataTable dt = new DataTable();
        System.Data.SqlClient.SqlDataAdapter adpter = new System.Data.SqlClient.SqlDataAdapter(sqlds.SelectCommand, connect);
        adpter.Fill(dt);
        DataRow dr = dt.NewRow();
        dt.Clear();
        dt.Rows.Add(dr);
        GridView1.DataSourceID = "";//绑定新数据源前先将原来的清理
        GridView1.DataSource = dt;
        GridView1.DataBind();

    }
    protected void SqlDataSource1_Selecting(object sender, SqlDataSourceSelectingEventArgs e)
    ...{
    }
    protected void Button1_Click(object sender, EventArgs e)
    ...{
        SqlDataSource1.SelectCommand = "SELECT [ProductID],[ProductName],[SupplierID] FROM [Alphabetical list of products] WHERE ([CategoryID] = '0')";
        GridView1.DataBind();
        if (GridView1.Rows.Count == 0)
        ...{
            NoRecordBuild(GridView1, SqlDataSource1);

        }
    }
}

前台：

<% @ Page Language = " C# "  AutoEventWireup = " true "  CodeFile = " gridview没数据显示表头 .aspx.cs "  Inherits = " gridview没数据显示表头_ "   %>

<! DOCTYPE html PUBLIC  " -//W3C//DTD XHTML 1.0 Transitional//EN "   " http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd " >

< html xmlns = " http://www.w3.org/1999/xhtml "   >
< head runat = " server " >
     < title > 无标题页 </ title >
</ head >
< body >
     < form id = " form1 "  runat = " server " >
     < div >
         < asp:Button ID = " Button1 "  runat = " server "  OnClick = " Button1_Click "  Text = " Button "   />
         < asp:GridView ID = " GridView1 "  runat = " server " >
         </ asp:GridView >
         < asp:SqlDataSource ID = " SqlDataSource1 "  runat = " server "  ConnectionString = " <%$ ConnectionStrings:NorthwindConnectionString %> "
            OnSelecting = " SqlDataSource1_Selecting " >
         </ asp:SqlDataSource >
    
     </ div >
     </ form >
</ body >
</ html >