我的问题是采用SqlDataSource 数据源控件时会了,我现在要在三层下用ObjectDataSource数据源控件来做,后台代码该怎么写呢?前台代码:
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
DataKeyNames="EmployeeID" DataSourceID="SqlDataSource1" AllowSorting="True" OnRowCommand="GridView1_RowCommand"
OnRowDataBound="GridView1_RowDataBound" OnRowUpdating="GridView1_RowUpdating">
<Columns>
<asp:ButtonField Text="SingleClick" CommandName="SingleClick" Visible="False" />
<asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" InsertVisible="False"
ReadOnly="True" SortExpression="EmployeeID" />
<asp:TemplateField HeaderText="LastName" SortExpression="LastName">
<ItemTemplate>
<asp:Label ID="lblLastName" runat="server" Text='<%# Eval("LastName") %>'></asp:Label>
<asp:TextBox ID="txtLastName" runat="server" Text='<%# Eval("LastName") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FirstName" SortExpression="FirstName">
<ItemTemplate>
<asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("FirstName") %>'></asp:Label>
<asp:TextBox ID="txtFirstName" runat="server" Text='<%# Eval("FirstName") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Country" SortExpression="Country">
<ItemTemplate>
<asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>'></asp:Label>
<asp:DropDownList ID="ddlCountry" runat="server" Visible="False" AutoPostBack="True"
DataSourceID="SqlDataSource1" DataTextField="Country" DataValueField="Country">
</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT DISTINCT [Country] FROM [Employees]"></asp:SqlDataSource>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ReportsTo" SortExpression="ReportsTo">
<ItemTemplate>
<asp:Label ID="lblReportsTo" runat="server" Text='<%# Eval("ReportsTo") %>'></asp:Label>
<asp:TextBox ID="txtReportsTo" runat="server" Text='<%# Eval("ReportsTo") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
这里原来数据源是SqlDataSource 现在我要用ObjectDataSource 来连接中间层
后台代码该怎么修改,研究的一天,没整出结果来,只好到这里来找大家帮忙,先谢谢了!
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" AutoGenerateColumns="False"
DataKeyNames="EmployeeID" DataSourceID="SqlDataSource1" AllowSorting="True" OnRowCommand="GridView1_RowCommand"
OnRowDataBound="GridView1_RowDataBound" OnRowUpdating="GridView1_RowUpdating">
<Columns>
<asp:ButtonField Text="SingleClick" CommandName="SingleClick" Visible="False" />
<asp:BoundField DataField="EmployeeID" HeaderText="EmployeeID" InsertVisible="False"
ReadOnly="True" SortExpression="EmployeeID" />
<asp:TemplateField HeaderText="LastName" SortExpression="LastName">
<ItemTemplate>
<asp:Label ID="lblLastName" runat="server" Text='<%# Eval("LastName") %>'></asp:Label>
<asp:TextBox ID="txtLastName" runat="server" Text='<%# Eval("LastName") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="FirstName" SortExpression="FirstName">
<ItemTemplate>
<asp:Label ID="lblFirstName" runat="server" Text='<%# Eval("FirstName") %>'></asp:Label>
<asp:TextBox ID="txtFirstName" runat="server" Text='<%# Eval("FirstName") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Country" SortExpression="Country">
<ItemTemplate>
<asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>'></asp:Label>
<asp:DropDownList ID="ddlCountry" runat="server" Visible="False" AutoPostBack="True"
DataSourceID="SqlDataSource1" DataTextField="Country" DataValueField="Country">
</asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT DISTINCT [Country] FROM [Employees]"></asp:SqlDataSource>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="ReportsTo" SortExpression="ReportsTo">
<ItemTemplate>
<asp:Label ID="lblReportsTo" runat="server" Text='<%# Eval("ReportsTo") %>'></asp:Label>
<asp:TextBox ID="txtReportsTo" runat="server" Text='<%# Eval("ReportsTo") %>' Visible="false"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
这里原来数据源是SqlDataSource 现在我要用ObjectDataSource 来连接中间层
后台代码该怎么修改,研究的一天,没整出结果来,只好到这里来找大家帮忙,先谢谢了!
DeleteCommand="DELETE FROM [Employees] WHERE [EmployeeID] = @EmployeeID" InsertCommand="INSERT INTO [Employees] ([LastName], [FirstName], [Country], [ReportsTo]) VALUES (@LastName, @FirstName, @Country, @ReportsTo)"
SelectCommand="SELECT [LastName], [FirstName], [Country], [EmployeeID], [ReportsTo] FROM [Employees]"
UpdateCommand="UPDATE [Employees] SET [LastName] = @LastName, [FirstName] = @FirstName, [Country] = @Country, [ReportsTo] = @ReportsTo WHERE [EmployeeID] = @EmployeeID">
<DeleteParameters>
<asp:Parameter Name="EmployeeID" Type="Int32" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="LastName" Type="String" />
<asp:Parameter Name="FirstName" Type="String" />
<asp:Parameter Name="Country" Type="String" />
<asp:Parameter Name="ReportsTo" Type="Int32" />
<asp:Parameter Name="EmployeeID" Type="Int32" />
</UpdateParameters>
<InsertParameters>
<asp:Parameter Name="LastName" Type="String" />
<asp:Parameter Name="FirstName" Type="String" />
<asp:Parameter Name="Country" Type="String" />
<asp:Parameter Name="ReportsTo" Type="Int32" />
</InsertParameters>
</asp:SqlDataSource>
private const int _firstEditCellIndex = 2; protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
this.GridView1.DataBind();
} if (this.GridView1.SelectedIndex > -1)
{
// 调用GridView的UpdateRow方法
this.GridView1.UpdateRow(this.GridView1.SelectedIndex, false);
}
} protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
// 从第一个单元格内获得LinkButton控件
LinkButton _singleClickButton = (LinkButton)e.Row.Cells[0].Controls[0];
// 返回一个字符串,表示对包含目标控件的 ID 和事件参数的回发函数的 JavaScript 调用
string _jsSingle = ClientScript.GetPostBackClientHyperlink(_singleClickButton, ""); // 给每一个可编辑的单元格增加事件
for (int columnIndex = _firstEditCellIndex; columnIndex < e.Row.Cells.Count; columnIndex++)
{
// 增加列索引作为事件参数
string js = _jsSingle.Insert(_jsSingle.Length - 2, columnIndex.ToString());
// 给单元格增加onclick事件
e.Row.Cells[columnIndex].Attributes["onclick"] = js;
// 给单元格增加鼠标经过时指针样式
e.Row.Cells[columnIndex].Attributes["style"] += "cursor:pointer;cursor:hand;";
}
}
} protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
GridView _gridView = (GridView)sender; switch (e.CommandName)
{
case ("SingleClick"):
// 获得行索引
int _rowIndex = int.Parse(e.CommandArgument.ToString());
// 解析事件参数(在RowDataBound中增加的),从而获得被选中的列的索引
int _columnIndex = int.Parse(Request.Form["__EVENTARGUMENT"]);
// 设置GridView被选中的行的索引(每次回发后判断GridView1.SelectedIndex > -1则更新)
_gridView.SelectedIndex = _rowIndex;
// 绑定
_gridView.DataBind(); // 事件记录
this.Message.Text += "单击GridView的行的索引为:" + _rowIndex.ToString()
+ ";列索引为:" + _columnIndex + "<br />"; // 获得被选中单元格的显示控件并设置其不可见
Control _displayControl = _gridView.Rows[_rowIndex].Cells[_columnIndex].Controls[1];
_displayControl.Visible = false;
// 获得被选中单元格的编辑控件并设置其可见
Control _editControl = _gridView.Rows[_rowIndex].Cells[_columnIndex].Controls[3];
_editControl.Visible = true;
// 清除被选中单元格属性以删除click事件
_gridView.Rows[_rowIndex].Cells[_columnIndex].Attributes.Clear(); // 设置焦点到被选中的编辑控件
ClientScript.RegisterStartupScript(GetType(), "SetFocus",
"<script>document.getElementById('" + _editControl.ClientID + "').focus();</script>");
// 如果编辑控件是DropDownList的话,那么把SelectedValue设置为显示控件的值
if (_editControl is DropDownList && _displayControl is Label)
{
((DropDownList)_editControl).SelectedValue = ((Label)_displayControl).Text;
}
// 如果编辑控件是TextBox的话则选中文本框内文本
if (_editControl is TextBox)
{
((TextBox)_editControl).Attributes.Add("onfocus", "this.select()");
} break;
}
} /// <summary>
/// 把值(values)从EditItemTemplate转移到NewValues集合里(使用数据源控件的话就需要这步)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
GridView _gridView = (GridView)sender;
string key = "";
string value = ""; // NewValues集合里的key
string[] _columnKeys = new string[] { "LastName", "FirstName", "Country", "ReportsTo" }; if (e.RowIndex > -1)
{
// 循环每一列
for (int i = _firstEditCellIndex; i < _gridView.Columns.Count; i++)
{
// 获得单元格里的控件
Control _displayControl = _gridView.Rows[e.RowIndex].Cells[i].Controls[1];
Control _editControl = _gridView.Rows[e.RowIndex].Cells[i].Controls[3]; // 获得列的key
key = _columnKeys[i - _firstEditCellIndex]; // 如果单元格处于编辑模式的话,那么从编辑控件中获取值
if (_editControl.Visible)
{
if (_editControl is TextBox)
{
value = ((TextBox)_editControl).Text;
}
else if (_editControl is DropDownList)
{
value = ((DropDownList)_editControl).SelectedValue;
} // 增加key/value对到NewValues集合
e.NewValues.Add(key, value);
}
// 否则从显示控件中获取值
else
{
value = ((Label)_displayControl).Text.ToString(); // 增加key/value对到NewValues集合
e.NewValues.Add(key, value);
}
}
}
} // 注册动态创建的客户端脚本
protected override void Render(HtmlTextWriter writer)
{
// 在RowDataBound中创建的自定义事件必须要在页中注册
// 通过重写Render方法来调用ClientScriptManager.RegisterForEventValidation。
// 通过GridViewRow.UniqueID返回行的唯一ID,按纽的唯一ID通过在行的唯一ID后附加“$ct100”而生成。
foreach (GridViewRow r in GridView1.Rows)
{
if (r.RowType == DataControlRowType.DataRow)
{
for (int columnIndex = _firstEditCellIndex; columnIndex < r.Cells.Count; columnIndex++)
{
Page.ClientScript.RegisterForEventValidation(r.UniqueID + "$ctl00", columnIndex.ToString());
}
}
} base.Render(writer);
}