正在阅读：ASP.Net开发新手常见问题备忘录ASP.Net开发新手常见问题备忘录

2005-08-09 10:05 出处：作者：JadyZhu 责任编辑：xietaoming

22.读取DataGrid控件TextBox值

foreach(DataGrid dgi in yourDataGrid.Items)
{
TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");
tb.Text....
}

23.在DataGrid中有3个模板列包含Textbox分别为 DG_ShuLiang (数量) DG_DanJian(单价) DG_JinE(金额)分别在5.6.7列，要求在录入数量及单价的时候自动算出金额即:数量*单价=金额还要求录入时限制为数值型.我如何用客户端脚本实现这个功能?

　　〖思归〗

   <asp:TemplateColumn HeaderText="数量">
<ItemTemplate>
   <asp:TextBox id="ShuLiang" runat='server'
Text='<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>'
    onkeyup="javascript:DoCal()"
   />

<asp:RegularExpressionValidator id="revS" runat="server"
ControlToValidate="ShuLiang" ErrorMessage="must be integer" ValidationExpression="^\d+$" />
</ItemTemplate>
</asp:TemplateColumn>

      <asp:TemplateColumn HeaderText="单价">
<ItemTemplate>
   <asp:TextBox id="DanJian" runat='server'
Text='<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>'
    onkeyup="javascript:DoCal()"
   />

<asp:RegularExpressionValidator id="revS2" runat="server"
ControlToValidate="DanJian" ErrorMessage="must be numeric" ValidationExpression="^\d+(\.\d*)?$" />

</ItemTemplate>
</asp:TemplateColumn>

     <asp:TemplateColumn HeaderText="金额">
<ItemTemplate>
   <asp:TextBox id="JinE" runat='server'
Text='<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%>' />
</ItemTemplate>
      </asp:TemplateColumn>

<script language="javascript">
function DoCal()
{
var e = event.srcElement;
var row = e.parentNode.parentNode;
var txts = row.all.tags("INPUT");
if (!txts.length || txts.length < 3)
return;

var q = txts[txts.length-3].value;
var p = txts[txts.length-2].value;

if (isNaN(q) || isNaN(p))
return;

q = parseInt(q);
p = parseFloat(p);

txts[txts.length-1].value = (q * p).toFixed(2);
}
</script>

24.datagrid选定比较底下的行时，为什么总是刷新一下，然后就滚动到了最上面，刚才选定的行因屏幕的关系就看不到了

page_load
page.smartNavigation=true

25.在Datagrid中修改数据，当点击编辑键时，数据出现在文本框中，怎么控制文本框的大小 ?

private void DataGrid1_ItemDataBound(obj sender,DataGridItemEventArgs e)
{
       for(int i=0;i<e.Item.Cells.Count-1;i++)
          if(e.Item.ItemType==ListItemType.EditType)
           {
                  e.Item.Cells[i].Attributes.Add("Width", "80px")
            }
}

26.对话框

private static string ScriptBegin = "<script language=\"JavaScript\">";
private static string ScriptEnd = "</script>";

public static void ConfirmMessageBox(string PageTarget,string Content)
{

   string ConfirmContent="var retValue=window.confirm('"+Content+"');"+"if(retValue){window.location='"+PageTarget+"';}";

   ConfirmContent=ScriptBegin + ConfirmContent + ScriptEnd;

   Page ParameterPage = (Page)System.Web.HttpContext.Current.Handler;
   ParameterPage.RegisterStartupScript("confirm",ConfirmContent);
   //Response.Write(strScript);

}