如何在数据源是空的时候，gridview显示表头（万能）
一般我们用gridview 绑定数据的时候，当数据源是空的时候，通常是写：EmptyDataText="没有任何数据可以显示"，这样的话表头是不显示的，下面的代码实现当数据源是空的时候，我们不仅显示表头，而且显示：没有任何数据可以显示，图片在最下面：
注意：一定要要设
EmptyDataText="没有任何数据可以显示"；然后在.cs文件里面bind()方法里面绑定数据源之后（this.GVpositionrecods.DataBind()）之后，把对应的代码复制过去，就OK了。
下面是代码：
.aspx
代码
<head runat="server">
<title>职位申请记录</title>
<link rel="stylesheet" href="css/common.css" type="text/css" />
<style type="text/css"> .cssPager span { color:blue;} </style>
</head>
<body>
<form id="form1" runat="server">
<div id="man_zone">
<center>
<asp:GridView AllowSorting="True" ID="GVpositionrecods" runat="server" PageSize="12" AllowPaging="True"
EmptyDataText="没有任何数据可以显示" Width="99%" AutoGenerateColumns="False" OnRowDataBound="GVpositionrecods_RowDataBound"
OnSelectedIndexChanged="GVpositionrecods_SelectedIndexChanged" OnSelectedIndexChanging="GVpositionrecods_SelectedIndexChanging"
OnPageIndexChanging="GVpositionrecods_PageIndexChanging" OnRowCreated="GVpositionrecods_RowCreated" OnSorting="GVpositionrecods_Sorting">
<Columns>
<asp:TemplateField HeaderText="职位" SortExpression="zhiwei">
<ItemTemplate>
<a href='throwseeen2.aspx?qiyeid=<%#Eval("qiyeid")%>&id=<%#Eval("ORDER_FORM_ID") %>'>
<%#Eval("zhiwei") %>
</a>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="企业名称" SortExpression="qiyeid">
<ItemTemplate>
<a href='seeenlist.aspx?getidforen=<%#Eval("qiyeid")%>'>
<%#Eval("qiye")%>
</a>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:BoundField DataField="COUNT" HeaderText="人数" SortExpression="COUNT">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="STAR_TIME" SortExpression="STAR_TIME" HeaderText="发布时间" DataFormatString="{0:yyyy-MM-dd}"
HtmlEncode="False">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="END_TIME" SortExpression="END_TIME" HeaderText="结束时间" DataFormatString="{0:yyyy-MM-dd}"
HtmlEncode="False">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="flag" HeaderText="状态">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
</Columns>
<AlternatingRowStyle BackColor="#E2F8FF"></AlternatingRowStyle>
<HeaderStyle HorizontalAlign="Center" BackColor="#99CCFF"></HeaderStyle>
<PagerStyle CssClass="cssPager" />
</asp:GridView>
<asp:Label ID="lbcontent" runat="server"></asp:Label>
</center>
</div>
</form>
</body>
<title>职位申请记录</title>
<link rel="stylesheet" href="css/common.css" type="text/css" />
<style type="text/css"> .cssPager span { color:blue;} </style>
</head>
<body>
<form id="form1" runat="server">
<div id="man_zone">
<center>
<asp:GridView AllowSorting="True" ID="GVpositionrecods" runat="server" PageSize="12" AllowPaging="True"
EmptyDataText="没有任何数据可以显示" Width="99%" AutoGenerateColumns="False" OnRowDataBound="GVpositionrecods_RowDataBound"
OnSelectedIndexChanged="GVpositionrecods_SelectedIndexChanged" OnSelectedIndexChanging="GVpositionrecods_SelectedIndexChanging"
OnPageIndexChanging="GVpositionrecods_PageIndexChanging" OnRowCreated="GVpositionrecods_RowCreated" OnSorting="GVpositionrecods_Sorting">
<Columns>
<asp:TemplateField HeaderText="职位" SortExpression="zhiwei">
<ItemTemplate>
<a href='throwseeen2.aspx?qiyeid=<%#Eval("qiyeid")%>&id=<%#Eval("ORDER_FORM_ID") %>'>
<%#Eval("zhiwei") %>
</a>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="企业名称" SortExpression="qiyeid">
<ItemTemplate>
<a href='seeenlist.aspx?getidforen=<%#Eval("qiyeid")%>'>
<%#Eval("qiye")%>
</a>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:BoundField DataField="COUNT" HeaderText="人数" SortExpression="COUNT">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="STAR_TIME" SortExpression="STAR_TIME" HeaderText="发布时间" DataFormatString="{0:yyyy-MM-dd}"
HtmlEncode="False">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="END_TIME" SortExpression="END_TIME" HeaderText="结束时间" DataFormatString="{0:yyyy-MM-dd}"
HtmlEncode="False">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="flag" HeaderText="状态">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
</Columns>
<AlternatingRowStyle BackColor="#E2F8FF"></AlternatingRowStyle>
<HeaderStyle HorizontalAlign="Center" BackColor="#99CCFF"></HeaderStyle>
<PagerStyle CssClass="cssPager" />
</asp:GridView>
<asp:Label ID="lbcontent" runat="server"></asp:Label>
</center>
</div>
</form>
</body>
代码
public void bind()
{
//得到对应的简历的ID，从SN里面查看值
ccwu.Model.T_RESUME_INFO listTemp = (ccwu.Model.T_RESUME_INFO)Session["t_resume_info"];
ccwu.Model.T_ORDER_RESUME torderresume = new ccwu.Model.T_ORDER_RESUME();
int id = Convert.ToInt32(listTemp.ID.ToString());
//得到对应的简历的ID，从SN里面查看值
ccwu.DAL.T_JOB jobdal = new ccwu.DAL.T_JOB();
string where = "RESUME_INFO_ID='" + id.ToString() + "'";
DataSet ds = jobdal.getlistResume(where);
DataView dv = new DataView(ds.Tables[0]);
dv.Sort = ViewState["sortExp"].ToString() + " " + ViewState["sortDir"].ToString();
GVpositionrecods.DataSource = dv;
this.GVpositionrecods.DataBind();
if (this.GVpositionrecods.Rows.Count > 0)
{
}
else//如果数据源是空的
{
//表头的设置
GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
foreach (DataControlField field in this.GVpositionrecods.Columns)
{
TableCell cell = new TableCell();
cell.Text = field.HeaderText;
cell.Width = field.HeaderStyle.Width;
cell.Height = field.HeaderStyle.Height;
cell.ForeColor = field.HeaderStyle.ForeColor;
cell.Font.Size = field.HeaderStyle.Font.Size;
cell.Font.Bold = field.HeaderStyle.Font.Bold;
cell.Font.Name = field.HeaderStyle.Font.Name;
cell.Font.Strikeout = field.HeaderStyle.Font.Strikeout;
cell.Font.Underline = field.HeaderStyle.Font.Underline;
cell.BackColor = field.HeaderStyle.BackColor;
cell.VerticalAlign = field.HeaderStyle.VerticalAlign;
cell.HorizontalAlign = field.HeaderStyle.HorizontalAlign;
cell.CssClass = field.HeaderStyle.CssClass;
cell.BorderColor = field.HeaderStyle.BorderColor;
cell.BorderStyle = field.HeaderStyle.BorderStyle;
cell.BorderWidth = field.HeaderStyle.BorderWidth;
row.Cells.Add(cell);
}
TableItemStyle headStyle = this.GVpositionrecods.HeaderStyle;
TableItemStyle emptyStyle = GVpositionrecods.EmptyDataRowStyle;
emptyStyle.Width = headStyle.Width;
emptyStyle.Height = headStyle.Height;
emptyStyle.ForeColor = headStyle.ForeColor;
emptyStyle.Font.Size = headStyle.Font.Size;
emptyStyle.Font.Bold = headStyle.Font.Bold;
emptyStyle.Font.Name = headStyle.Font.Name;
emptyStyle.Font.Strikeout = headStyle.Font.Strikeout;
emptyStyle.Font.Underline = headStyle.Font.Underline;
emptyStyle.BackColor = headStyle.BackColor;
emptyStyle.VerticalAlign = headStyle.VerticalAlign;
emptyStyle.HorizontalAlign = headStyle.HorizontalAlign;
emptyStyle.CssClass = headStyle.CssClass;
emptyStyle.BorderColor = headStyle.BorderColor;
emptyStyle.BorderStyle = headStyle.BorderStyle;
emptyStyle.BorderWidth = headStyle.BorderWidth;
//空白行的设置
GridViewRow row1 = new GridViewRow(0, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
TableCell cell1 = new TableCell();
cell1.Text = "没有任何数据可以显示";
cell1.BackColor = System.Drawing.Color.White;
row1.Cells.Add(cell1);
cell1.ColumnSpan = 6;
if (this.GVpositionrecods.Controls.Count == 0)
{
GVpositionrecods.Page.Response.Write("<script language='javascript'>alert('必须在初始化表格类之前执行DataBind方法并设置EmptyDataText属性不为空!');</script>");
}
else
{
GVpositionrecods.Controls[0].Controls.Clear();
this.GVpositionrecods.Controls[0].Controls.AddAt(0, row);
this.GVpositionrecods.Controls[0].Controls.AddAt(1, row1);
}
}
}
{
//得到对应的简历的ID，从SN里面查看值
ccwu.Model.T_RESUME_INFO listTemp = (ccwu.Model.T_RESUME_INFO)Session["t_resume_info"];
ccwu.Model.T_ORDER_RESUME torderresume = new ccwu.Model.T_ORDER_RESUME();
int id = Convert.ToInt32(listTemp.ID.ToString());
//得到对应的简历的ID，从SN里面查看值
ccwu.DAL.T_JOB jobdal = new ccwu.DAL.T_JOB();
string where = "RESUME_INFO_ID='" + id.ToString() + "'";
DataSet ds = jobdal.getlistResume(where);
DataView dv = new DataView(ds.Tables[0]);
dv.Sort = ViewState["sortExp"].ToString() + " " + ViewState["sortDir"].ToString();
GVpositionrecods.DataSource = dv;
this.GVpositionrecods.DataBind();
if (this.GVpositionrecods.Rows.Count > 0)
{
}
else//如果数据源是空的
{
//表头的设置
GridViewRow row = new GridViewRow(-1, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
foreach (DataControlField field in this.GVpositionrecods.Columns)
{
TableCell cell = new TableCell();
cell.Text = field.HeaderText;
cell.Width = field.HeaderStyle.Width;
cell.Height = field.HeaderStyle.Height;
cell.ForeColor = field.HeaderStyle.ForeColor;
cell.Font.Size = field.HeaderStyle.Font.Size;
cell.Font.Bold = field.HeaderStyle.Font.Bold;
cell.Font.Name = field.HeaderStyle.Font.Name;
cell.Font.Strikeout = field.HeaderStyle.Font.Strikeout;
cell.Font.Underline = field.HeaderStyle.Font.Underline;
cell.BackColor = field.HeaderStyle.BackColor;
cell.VerticalAlign = field.HeaderStyle.VerticalAlign;
cell.HorizontalAlign = field.HeaderStyle.HorizontalAlign;
cell.CssClass = field.HeaderStyle.CssClass;
cell.BorderColor = field.HeaderStyle.BorderColor;
cell.BorderStyle = field.HeaderStyle.BorderStyle;
cell.BorderWidth = field.HeaderStyle.BorderWidth;
row.Cells.Add(cell);
}
TableItemStyle headStyle = this.GVpositionrecods.HeaderStyle;
TableItemStyle emptyStyle = GVpositionrecods.EmptyDataRowStyle;
emptyStyle.Width = headStyle.Width;
emptyStyle.Height = headStyle.Height;
emptyStyle.ForeColor = headStyle.ForeColor;
emptyStyle.Font.Size = headStyle.Font.Size;
emptyStyle.Font.Bold = headStyle.Font.Bold;
emptyStyle.Font.Name = headStyle.Font.Name;
emptyStyle.Font.Strikeout = headStyle.Font.Strikeout;
emptyStyle.Font.Underline = headStyle.Font.Underline;
emptyStyle.BackColor = headStyle.BackColor;
emptyStyle.VerticalAlign = headStyle.VerticalAlign;
emptyStyle.HorizontalAlign = headStyle.HorizontalAlign;
emptyStyle.CssClass = headStyle.CssClass;
emptyStyle.BorderColor = headStyle.BorderColor;
emptyStyle.BorderStyle = headStyle.BorderStyle;
emptyStyle.BorderWidth = headStyle.BorderWidth;
//空白行的设置
GridViewRow row1 = new GridViewRow(0, -1, DataControlRowType.EmptyDataRow, DataControlRowState.Normal);
TableCell cell1 = new TableCell();
cell1.Text = "没有任何数据可以显示";
cell1.BackColor = System.Drawing.Color.White;
row1.Cells.Add(cell1);
cell1.ColumnSpan = 6;
if (this.GVpositionrecods.Controls.Count == 0)
{
GVpositionrecods.Page.Response.Write("<script language='javascript'>alert('必须在初始化表格类之前执行DataBind方法并设置EmptyDataText属性不为空!');</script>");
}
else
{
GVpositionrecods.Controls[0].Controls.Clear();
this.GVpositionrecods.Controls[0].Controls.AddAt(0, row);
this.GVpositionrecods.Controls[0].Controls.AddAt(1, row1);
}
}
}
知识点1：
GridViewRow和DataRowView完全就是两个不相干的东西 是两个级别的事情 一个是控件级别的 一个是数据级别的
GridViewRow：
MSDN解释：呈现 GridView 控件之前，必须先为该控件中的每一行创建一个 GridViewRow 对象。在创建 GridView 控件中的每一行时，将引发 RowCreated 事件。这使您可以提供一个这样的事件处理方法，即每次发生此事件时就执行一个自定义例程（如在行中添加自定义内容）。
使用 RowCreated 事件将正在创建的行的索引存储在该行所包含 LinkButton 控件的 CommandArgument 属性中；(每当创建一行的时候，执行RowCreated事件里面的代码)
知识点2：(在有页码的时候，当前页码变大，且颜色也变)
用样式显示当前页码；
<style type="text/css"> .cssPager span { color:blue;} </style>
<PagerStyle CssClass="cssPager" />
