记录的批量修改

使用GridView自带的编辑功能，只能一条一条记录的修改，如果要求批量修改，必须使用模板。

对于ASPxGridView，方法如下：

（1）aspx文件

<dxwgv:ASPxGridView ID="grid" runat="server" AutoGenerateColumns="False"

DataSourceID="DSCourse" KeyFieldName="CourseID" ClientInstanceName="grid" >

<SettingsPager Visible="False">

</SettingsPager>

<Columns>

<dxwgv:GridViewCommandColumn ShowSelectCheckbox="True" VisibleIndex="0">

</dxwgv:GridViewCommandColumn>

<dxwgv:GridViewDataTextColumn Caption="序号" VisibleIndex="1" Width="25px">

<DataItemTemplate>

<%# Container.ItemIndex+1%>

</DataItemTemplate>

</dxwgv:GridViewDataTextColumn>

<dxwgv:GridViewDataTextColumn FieldName="CourseName" VisibleIndex="2">

</dxwgv:GridViewDataTextColumn>

<dxwgv:GridViewDataTextColumn FieldName="Credit" VisibleIndex="3">

<DataItemTemplate>

<dxe:ASPxTextBox ID="ASPxTextBox1" runat="server" Text='<%# Bind("Credit") %>'

Value='<%# Bind("Credit") %>' Width="170px">

</dxe:ASPxTextBox>

</DataItemTemplate>

</dxwgv:GridViewDataTextColumn>

<dxwgv:GridViewDataTextColumn FieldName="CreditHour" VisibleIndex="4">

<DataItemTemplate>

<dxe:ASPxTextBox ID="ASPxTextBox2" runat="server" Text='<%# Bind("CreditHour") %>'

Value='<%# Bind("CreditHour") %>' Width="170px">

</dxe:ASPxTextBox>

</DataItemTemplate>

</dxwgv:GridViewDataTextColumn>

</Columns>

</dxwgv:ASPxGridView>

其中数据源为：

<asp:AccessDataSource ID="DSCourse" runat="server" DataFile="~/WebCourse.mdb"

SelectCommand="SELECT [CourseID], [CourseName], [Credit], [CreditHour],[zp] FROM [Course]" UpdateCommand="update Course set Credit=?,CreditHour=?,zp=Credit+CreditHour where CourseID=?">

<UpdateParameters>

<asp:Parameter Name="Credit" Type="Single" />

<asp:Parameter Name="CreditHour" Type="Single" />

<asp:Parameter Name="CourseID" Type="Int32" />

</UpdateParameters>

</asp:AccessDataSource>

（2）cs文件

protected void ASPxButton3_Click(object sender, EventArgs e)

{

for(int i=0;i<grid.VisibleRowCount;i++)

{

ASPxTextBox tb1 = grid.FindRowCellTemplateControl(i, null, "ASPxTextBox1") as ASPxTextBox;

ASPxTextBox tb2 = grid.FindRowCellTemplateControl(i, null, "ASPxTextBox2") as ASPxTextBox;

DSCourse.UpdateParameters["Credit"].DefaultValue = tb1.Text;

DSCourse.UpdateParameters["CreditHour"].DefaultValue = tb2.Text;

DSCourse.UpdateParameters["CourseID"].DefaultValue = grid.GetRowValues(i, "CourseID").ToString();

DSCourse.Update();

}

}

而对于VS2005自带的GridView控件，方法要简单一些，如下：

（1）aspx文件

<asp:GridView ID="grid1" runat="server" AutoGenerateColumns="False" DataKeyNames="CourseID"

DataSourceID="DSCourse" BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" CellPadding="2" ForeColor="Black" GridLines="None">

<Columns>

<asp:BoundField DataField="CourseName" HeaderText="CourseName" SortExpression="CourseName" />

<asp:TemplateField HeaderText="Credit" SortExpression="Credit">

<ItemTemplate>

<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Credit") %>'></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField HeaderText="CreditHour" SortExpression="CreditHour">

<ItemTemplate>

<asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("CreditHour") %>'></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:BoundField DataField="zp" HeaderText="总分" SortExpression="zp" />

</Columns>

<FooterStyle BackColor="Tan" />

<PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />

<SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />

<HeaderStyle BackColor="Tan" Font-Bold="True" />

<AlternatingRowStyle BackColor="PaleGoldenrod" />

</asp:GridView>

（2）cs文件

protected void ASPxButton2_Click(object sender, EventArgs e)

{

for (int i = 0; i < grid1.Rows.Count; i++)

grid1.UpdateRow(i, false);

}

很奇怪，ASPxGridView控件为何没有UpdateRow方法？