(转)aspxgridview记录的批量修改

<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>

<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>

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();

}
}