GridView 批量删除,自定义分页,定位页码

 

前台代码: 

<table width="100%" height="20" border="1" align="center" cellpadding="0" cellspacing="0" bordercolorlight="#FFFFFF" bordercolordark="#E6E6E6" bgcolor="#FFFFFF"> 
<tr bgcolor="#FFFFFF"> 
<td width="7%" align="center"> 
<asp:CheckBox ID="cbAll" runat="server" AutoPostBack="True" OnCheckedChanged="cbAll_CheckedChanged" /></td> 
<td width="8%" align="center"><img src="images/bz.gif" width="6" height="11"></td> 
<td width="9%" align="center"><img src="images/mail.gif" width="14" height="11"></td> 
<td width="16%" align="center">发件人</td> 
<td width="39%" align="center">标题</td> 
<td width="21%" align="center">日期</td> 
</tr></table> 

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 
BackColor="White" BorderColor="#CC9966" BorderWidth="1px" CellPadding="4" 
DataKeyNames="id" HorizontalAlign="Center" 
Width="100%" BorderStyle="None" ShowHeader="False" AllowPaging="True" OnDataBound="GridView1_DataBound"> 

<FooterStyle BackColor="#FFFFCC" ForeColor="#330099" /> 
<Columns> 
<asp:TemplateField > 
<ItemStyle HorizontalAlign="Center" /> 
<ItemTemplate> 
<asp:CheckBox ID=cb runat=server /> 
</ItemTemplate> 
</asp:TemplateField> 
<asp:ImageField HeaderImageUrl="images/bz.gif"> 
<ItemStyle Width="8%" /> 
</asp:ImageField> 
<asp:TemplateField HeaderImageUrl="images/mail.gif"> 
<ItemTemplate> 
<img src=<%# Eval("view").ToString()=="0"?"images/mailread.gif":"images/mail.gif" %> border=0 align=middle /> 
</ItemTemplate> 
<ItemStyle HorizontalAlign="Center" Width="9%" /> 
</asp:TemplateField> 
<asp:BoundField DataField="email" HeaderText="发件人"> 
<ItemStyle Width="16%" /> 
</asp:BoundField> 
<asp:HyperLinkField DataNavigateUrlFields="id" DataNavigateUrlFormatString="viewmail.aspx?id={0}" 
DataTextField="title" HeaderText="标题" > 
<ItemStyle Width="39%" /> 
</asp:HyperLinkField> 
<asp:BoundField DataField="date" DataFormatString="{0:d}" HeaderText="日期"> 
<ItemStyle Width="21%" /> 
</asp:BoundField> 
</Columns> 
<PagerTemplate> 

</PagerTemplate> 
<SelectedRowStyle BackColor="#FFCC66" ForeColor="#663399" Font-Bold="True" /> 
<PagerStyle BackColor="#FFFFCC" ForeColor="#330099" HorizontalAlign="Center" /> 
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" /> 
<RowStyle BackColor="White" ForeColor="#330099" /> 
</asp:GridView> 
<table width="100%" height="20" border="1" cellpadding="0" cellspacing="0" bordercolorlight="#FFFFFF" bordercolordark="#E6E6E6" bgcolor="#FFFFFF"> 
<tr><td> 
<asp:Button ID="Button1" runat="server" Text="全选" OnClick="Button1_Click" />&nbsp; 
<asp:Button ID="Button2" runat="server" Text="删除" OnClick="Button2_Click" /></td> 
<td align=right> 
<asp:LinkButton ID="lnkbtnFrist" runat="server" OnClick="lnkbtnFrist_Click">首页</asp:LinkButton> 
<asp:LinkButton ID="lnkbtnPre" runat="server" OnClick="lnkbtnPre_Click">上一页</asp:LinkButton> 
<asp:Label ID="lblCurrentPage" runat="server"></asp:Label> 
<asp:LinkButton ID="lnkbtnNext" runat="server" OnClick="lnkbtnNext_Click">下一页</asp:LinkButton> 
<asp:LinkButton ID="lnkbtnLast" runat="server" OnClick="lnkbtnLast_Click">尾页</asp:LinkButton> 
跳转到第<asp:DropDownList ID="ddlCurrentPage" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged"> 
</asp:DropDownList>页</td> 
</tr></table> 

 后台代码:

 

void DataBinds() 
{ 
if (!opMail.ReceiveGetList(userid)) 
{ 
base.MessageBox(string.Empty, opMail.strErrMsg); 
} 
else 
{ 
this.GridView1.DataSource = opMail.dataView; 
this.GridView1.DataBind(); 
} 

this.ddlCurrentPage.Items.Clear(); 
for (int i = 1; i <= this.GridView1.PageCount; i++) 
{ 
this.ddlCurrentPage.Items.Add(i.ToString()); 
} 
this.ddlCurrentPage.SelectedIndex = this.GridView1.PageIndex; 
} 
//全选checkbox 
protected void Button1_Click(object sender, EventArgs e) 
{ 
foreach (GridViewRow row in GridView1.Rows) 
{ 
((CheckBox)row.Cells[0].FindControl("cb")).Checked = true; 
} 
} 
//删除所选 
protected void Button2_Click(object sender, EventArgs e) 
{ 
for (int rowindex = 0; rowindex < this.GridView1.Rows.Count; rowindex++) 
{ 
if (((CheckBox)this.GridView1.Rows[rowindex].Cells[0].FindControl("cb")).Checked == true) 
{ 
//删除Convert.ToInt32(this.GridView1.DataKeys[rowindex].Value) 
if (!opMail.ReceiveDelete(Convert.ToInt32(this.GridView1.DataKeys[rowindex].Value))) 
{ 
base.MessageBox(string.Empty, opMail.strErrMsg); 
} 
} 
} 
DataBinds(); 
} 
protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e) 
{ 
this.GridView1.PageIndex = e.NewPageIndex; 
DataBinds(); 
} 
protected void cbAll_CheckedChanged(object sender, EventArgs e) 
{ 
if (this.cbAll.Checked == true) 
{ 
foreach (GridViewRow row in GridView1.Rows) 
{ 
((CheckBox)row.Cells[0].FindControl("cb")).Checked = true; 
} 
} 
else 
{ 
foreach (GridViewRow row in GridView1.Rows) 
{ 
((CheckBox)row.Cells[0].FindControl("cb")).Checked = false; 
} 
} 
} 
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e) 
{ 
this.GridView1.PageIndex = this.ddlCurrentPage.SelectedIndex; 
DataBinds(); 
} 
protected void lnkbtnFrist_Click(object sender, EventArgs e) 
{ 
this.GridView1.PageIndex = 0; 
DataBinds(); 
} 
protected void lnkbtnPre_Click(object sender, EventArgs e) 
{ 
if (this.GridView1.PageIndex > 0) 
{ 
this.GridView1.PageIndex = this.GridView1.PageIndex - 1; 
DataBinds(); 
} 
} 
protected void lnkbtnNext_Click(object sender, EventArgs e) 
{ 
if (this.GridView1.PageIndex < this.GridView1.PageCount) 
{ 
this.GridView1.PageIndex = this.GridView1.PageIndex + 1; 
DataBinds(); 
} 
} 
protected void lnkbtnLast_Click(object sender, EventArgs e) 
{ 
this.GridView1.PageIndex = this.GridView1.PageCount; 
DataBinds(); 
} 
protected void GridView1_DataBound(object sender, EventArgs e) 
{ 
this.lblCurrentPage.Text = string.Format("当前第{0}页/总共{1}页", this.GridView1.PageIndex + 1, this.GridView1.PageCount); 
}