我希望通过输入"本次入库数量"后触发ontextchanged事件.
可是总是报错!
--------------------------
If CDec(CType(Datagrid2.FindControl("本次入库数量"), TextBox).Text.Trim()) + CDec(CType(Datagrid2.FindControl("累计入库数量"), TextBox).Text.Trim()) >= CDec(CType(Datagrid2.FindControl("计划数量"), Label).Text.Trim()) Then
Response.Write("<script language='javascript'>alert('本行记录不保存!');</script>")
-------------------------
该怎么该呢?
可是总是报错!
--------------------------
If CDec(CType(Datagrid2.FindControl("本次入库数量"), TextBox).Text.Trim()) + CDec(CType(Datagrid2.FindControl("累计入库数量"), TextBox).Text.Trim()) >= CDec(CType(Datagrid2.FindControl("计划数量"), Label).Text.Trim()) Then
Response.Write("<script language='javascript'>alert('本行记录不保存!');</script>")
-------------------------
该怎么该呢?
解决方案 »
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这种取值方式肯定有问题
我也知道有问题,总提示还没有初始化!
可是该如何解决呢!
我一般用 c# 的服务器控件,取值语句如下:
datagrid1.itmes[index].cells[cell_index].text下面是帮助文件中的示例代码:示例
[Visual Basic, C#, JScript] 下面的示例展示如何使用 Items 集合来显示 DataGrid 控件中各项的内容。[Visual Basic]
<%@ Import Namespace="System.Data" %>
<html>
<script language="VB" runat="server">
Dim Cart As DataTable
Dim CartView As DataView
Function CreateDataSource() As ICollection
Dim dt As New DataTable()
Dim dr As DataRow
dt.Columns.Add(New DataColumn("IntegerValue", GetType(Int32)))
dt.Columns.Add(New DataColumn("StringValue", GetType(String)))
dt.Columns.Add(New DataColumn("CurrencyValue", GetType(Double)))
Dim i As Integer
For i = 0 To 9
dr = dt.NewRow()
dr(0) = i
dr(1) = "Item " & i.ToString()
dr(2) = 1.23 *(i + 1)
dt.Rows.Add(dr)
Next i
Dim dv As New DataView(dt)
Return dv
End Function 'CreateDataSource
Sub Page_Load(sender As Object, e As EventArgs)
If Not IsPostBack Then
' Need to load this data only once.
ItemsGrid.DataSource = CreateDataSource()
ItemsGrid.DataBind()
End If
End Sub 'Page_Load
Sub Button_Click(sender As Object, e As EventArgs)
Dim item As DataGridItem
For Each item In ItemsGrid.Items
Label1.Text &= "<br>" & item.Cells(0).Text & _
" " & item.Cells(1).Text & _
" " & item.Cells(2).Text
Next item
End Sub 'Button_Click
</script>
<body>
<form runat=server> <h3>DataGrid Items Collection Example</h3>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
ShowFooter="true"
AutoGenerateColumns="true"> <HeaderStyle BackColor="#00aaaa">
</HeaderStyle> <FooterStyle BackColor="#00aaaa">
</FooterStyle>
</asp:DataGrid>
<br> <asp:Button id="Button1"
Text="Display Contents of Items Collection"
OnClick="Button_Click"
runat="server"/> <br>
<asp:Label id="Label1"
runat="server"/>
</form>
</body>
</html>
[C#]
<%@ Import Namespace="System.Data" %>
<html>
<script language="C#" runat="server">
DataTable Cart;
DataView CartView;
ICollection CreateDataSource()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i < 10; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i+1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
if (!IsPostBack)
{
// Need to load this data only once.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
void Button_Click(Object sender, EventArgs e)
{
foreach (DataGridItem item in ItemsGrid.Items)
{
Label1.Text += "<br>" + item.Cells[0].Text +
" " + item.Cells[1].Text +
" " + item.Cells[2].Text;
}
}
</script>
<body>
<form runat=server> <h3>DataGrid Items Collection Example</h3>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
ShowFooter="true"
AutoGenerateColumns="true"> <HeaderStyle BackColor="#00aaaa">
</HeaderStyle> <FooterStyle BackColor="#00aaaa">
</FooterStyle>
</asp:DataGrid>
<br> <asp:Button id="Button1"
Text="Display Contents of Items Collection"
OnClick="Button_Click"
runat="server"/> <br>
<asp:Label id="Label1"
runat="server"/>
</form>
</body>
</html>
[JScript]
<%@ Import Namespace="System.Data" %>
<html>
<script language="JScript" runat="server">
var Cart : DataTable;
var CartView : DataView;
function CreateDataSource() : ICollection
{
var dt : DataTable = new DataTable();
var dr : DataRow;
dt.Columns.Add(new DataColumn("IntegerValue", Int32));
dt.Columns.Add(new DataColumn("StringValue", System.String));
dt.Columns.Add(new DataColumn("CurrencyValue", double));
for (var i : int = 0; i < 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i+1);
dt.Rows.Add(dr);
}
var dv : DataView = new DataView(dt);
return dv;
}
function Page_Load(sender, e : EventArgs)
{
if (!IsPostBack)
{
// Need to load this data only once.
ItemsGrid.DataSource = CreateDataSource();
ItemsGrid.DataBind();
}
}
function Button_Click(sender, e : EventArgs)
{
for (var item : DataGridItem in ItemsGrid.Items)
{
Label1.Text += "<br>" + item.Cells[0].Text +
" " + item.Cells[1].Text +
" " + item.Cells[2].Text;
}
}
</script>
<body>
<form runat=server> <h3>DataGrid Items Collection Example</h3>
<asp:DataGrid id="ItemsGrid" runat="server"
BorderColor="black"
BorderWidth="1"
CellPadding="3"
ShowFooter="true"
AutoGenerateColumns="true"> <HeaderStyle BackColor="#00aaaa">
</HeaderStyle> <FooterStyle BackColor="#00aaaa">
</FooterStyle>
</asp:DataGrid>
<br> <asp:Button id="Button1"
Text="Display Contents of Items Collection"
OnClick="Button_Click"
runat="server"/> <br>
<asp:Label id="Label1"
runat="server"/>
</form>
</body>
</html>
[C++] 没有可用于 C++ 的示例。若要查看 Visual Basic、C# 或 JScript 示例,请单击页左上角的语言筛选器按钮 。
这是winform里面的
datagrid1.items[datagrid1.EditItemIndex].cells[i].text