(C#)DataGrid实现自定义分页,鼠标移至变色,删除确认、可编辑,可删除

发布时间:2009年06月04日      浏览次数:685 次
数据库:SqlServer 2000, 数据源:系统自带的Northwind
操作系统:Window XP 中文版
开发平台:.Net Framework 1.1, C#语言
效果预览:

好了,让我们开始奇异的Datagrid之旅吧:
先在数据库中定义存储过程,轻易实现百万级数据分页:
//@PageSize:分页大小,PageIndex:页号,@PageCount:总页数,@recordCount:记录数
CREATE PROCEDURE GetCustomDataPage @pageSize int, @pageIndex int, @pageCount int output, @recordCount int output AS
declare @SQL varchar(1000)
select @recordCount=count(*) from products
set @pageCount=ceiling(@recordCount*1.0/@pageSize)
if @pageIndex = 0 or @pageCount<=1
set @SQL='select top '+str(@pageSize)+' productID,productName, unitPrice from products order by productID asc'
else if @pageIndex = @pageCount -1
set @SQL='select * from ( select top '+str(@recordCount - @pageSize * @pageIndex)+' productID,productName, unitPrice from products order by productID desc) TempTable order by productID asc'
else set @SQL='select top '+str(@pageSize) +' * from ( select top '+str(@recordCount - @pageSize * @pageIndex)+' productID,productName, unitPrice from products order by productID desc) TempTable order by productID asc'

exec(@SQL)
GO
好了,存储过程建好了,那么如何在.Net中使用呢?请看以下代码:
private uint pageCount; //总页数

private uint recordCount; //总记录数


private DataSet GetPageData(uint pageSize, uint pageIndex)

{

string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];

SqlConnection conn = new SqlConnection(strConn);



conn.Open();



SqlCommand command = new SqlCommand("GetCustomDataPage",conn); //第一个参数为存储过程名

command.CommandType = CommandType.StoredProcedure; //声明命令类型为存储过程



command.Parameters.Add("@pageSize",SqlDbType.Int);

command.Parameters["@pageSize"].Value = pageSize;



command.Parameters.Add("@pageIndex",SqlDbType.Int);

command.Parameters["@pageIndex"].Value = pageIndex;



command.Parameters.Add("@pageCount",SqlDbType.Int);

command.Parameters["@pageCount"].Value = pageCount;

command.Parameters["@pageCount"].Direction = ParameterDirection.Output; //存储过程中的输出参数



command.Parameters.Add("@recordCount",SqlDbType.Int);

command.Parameters["@recordCount"].Value = recordCount;

command.Parameters["@recordCount"].Direction = ParameterDirection.Output; //存储过程中的输出参数



SqlDataAdapter adapter = new SqlDataAdapter(command);

DataSet ds = new DataSet();

adapter.Fill(ds);



//获得输出参数值

pageCount = Convert.ToUInt32(command.Parameters["@pageCount"].Value);

recordCount = Convert.ToUInt32(command.Parameters["@recordCount"].Value);



conn.Close();

return ds;

}



//绑定数据到DataGrid中

private void BindDataGrid()

{

DataSet ds = GetPageData((uint)dgProduct.PageSize,(uint)dgProduct.CurrentPageIndex);

dgProduct.VirtualItemCount = (int)recordCount;

dgProduct.DataSource = ds;

dgProduct.DataBind();

}



//页面加载时就绑定DataGrid

private void Page_Load(object sender, System.EventArgs e)

{

if(!Page.IsPostBack)

{

BindDataGrid();

}

}

//用户翻页时事件处理

private void dgProduct_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)

{

dgProduct.CurrentPageIndex = e.NewPageIndex;

BindDataGrid();

}



//用户单击编辑按纽时事件处理

private void dgProduct_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgProduct.EditItemIndex = e.Item.ItemIndex;

BindDataGrid();

}



//用户单击取消按纽时事件处理

private void dgProduct_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

dgProduct.EditItemIndex = -1;

BindDataGrid();

}



//用户单击更新按纽时事件处理

private void dgProduct_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];

SqlConnection conn = new SqlConnection(strConn);



conn.Open();

//string strSQL = "update from products set productName=@productName, set unitPrice=@unitPrice where productID=@productID";

string strSQL = "update products set productName=@productName where productID=@productID";

SqlCommand command = new SqlCommand(strSQL,conn);



command.Parameters.Add("@productName",SqlDbType.NVarChar,40);

command.Parameters["@productName"].Value = ((TextBox)(e.Item.Cells[1].Controls[0])).Text.Trim();



//command.Parameters.Add("@unitPrice",SqlDbType.Int);

//command.Parameters["@unitPrice"].Value = Convert.ToInt32(((TextBox)(e.Item.Cells[2].Controls[0])).Text.Trim());



command.Parameters.Add("@productID",SqlDbType.Int);

command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex];



command.ExecuteNonQuery();

conn.Close();



dgProduct.EditItemIndex = -1;

BindDataGrid();

}



//用户单击删除按纽时事件处理

private void dgProduct_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

string strConn = System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];

SqlConnection conn = new SqlConnection(strConn);



conn.Open();

SqlCommand command = new SqlCommand("DeleteProduct",conn);

command.CommandType = CommandType.StoredProcedure;



command.Parameters.Add("@productID",SqlDbType.Int);

command.Parameters["@productID"].Value = dgProduct.DataKeys[e.Item.ItemIndex];



command.ExecuteNonQuery();

BindDataGrid();

}



//实现删除确认及颜色交替显示功能

private void dgProduct_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)

{

if(e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)

{

Button btnDelete = (Button)(e.Item.Cells[4].Controls[0]);

btnDelete.Attributes.Add("onClick","JavaScript:return confirm('确定删除?')");



e.Item.Attributes.Add("onMouseOver","this.style.backgroundColor='#FFCC66'");

e.Item.Attributes.Add("onMouseOut","this.style.backgroundColor='#ffffff'");

}

}
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