绑定gridview时，我想获取单元格控件值，但在我的代码中抛出错误。如下所示，我将gridview与编辑，删除和页脚行绑定。
<asp:GridView ID="GridView1" runat="server" Width = "100%"
OnDataBound = "OnDataBound" OnRowCreated = "OnRowCreated"
AutoGenerateColumns = "False" Font-Names = "Arial"
Font-Size = "11pt" AlternatingRowStyle-BackColor = "#C2D69B"
HeaderStyle-BackColor = "green" AllowSorting="True" AllowPaging ="True" ShowFooter = "True"
OnPageIndexChanging = "OnPaging" onrowediting="EditCustomer"
onrowupdating="UpdateCustomer" onrowcancelingedit="CancelEdit" PageSize = "30">
<Columns>
<asp:TemplateField ItemStyle-Width = "100px" HeaderText="S.NO">
<ItemTemplate><%#Container.DataItemIndex + 1%>
</ItemTemplate>
<ItemStyle Width="100px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "100px" HeaderText = "Item Code">
<FooterTemplate>
<asp:Label ID="lblAddItemCode" runat="server"
Text='<%# Eval("ItemId")%>'></asp:Label>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblViewItemCode" runat="server"
Text='<%# Eval("ItemId")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:Label ID="lblEditItemCode" runat="server"
Text='<%# Eval("ItemId")%>'></asp:Label>
</EditItemTemplate>
<ItemStyle Width="100px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "100px" HeaderText = "Item Name">
<EditItemTemplate>
<asp:Label ID="lblEditItemName" runat="server"
Text='<%# Eval("ItemName")%>'></asp:Label>
</EditItemTemplate>
<FooterTemplate>
<asp:DropDownList ID="ddlItemNameGrid" runat="server"
DataSourceID="SqlDataSource1" DataTextField="ItemName"
DataValueField="ItemId">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:crmConnectionString3 %>"
SelectCommand="SELECT [ItemId], [ItemName] FROM [ItemMaster] WHERE ([Company_Id] = @Company_Id)">
<SelectParameters>
<asp:SessionParameter DefaultValue="1014" Name="Company_Id"
SessionField="RegistrationId" Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
</FooterTemplate>
<ItemTemplate>
<asp:Label ID="lblViewItemName" runat="server"
Text='<%# Eval("ItemName")%>'></asp:Label>
</ItemTemplate>
<ItemStyle Width="100px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "150px" HeaderText = "Unit">
<ItemTemplate>
<asp:Label ID="lblViewUnit" runat="server"
Text='<%# Eval("Unit")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEditUnit" runat="server" Text='<%# Eval("Unit")%>' ValidationGroup="EditValidations"></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtEditUnit" CssClass="Validators" Display="Dynamic" ControlToValidate="txtEditUnit" runat="server"
ErrorMessage="Unit is required." ForeColor="Red" ValidationGroup="EditValidations"></asp:RequiredFieldValidator>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtAddUnit" runat="server" ValidationGroup="AddValidations"></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtAddUnit" CssClass="Validators" Display="Dynamic" ControlToValidate="txtAddUnit" runat="server"
ErrorMessage="Unit is required." ForeColor="Red" ValidationGroup="AddValidations"></asp:RequiredFieldValidator>
</FooterTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "150px" HeaderText = "Quantity">
<ItemTemplate>
<asp:Label ID="lblViewQuantity" runat="server"
Text='<%# Eval("Quantity")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEditQuantity" runat="server"
Text='<%# Eval("Quantity")%>'></asp:TextBox>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtAddQuantity" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtAddQuantity" CssClass="Validators" Display="Dynamic" ControlToValidate="txtAddQuantity" runat="server"
ErrorMessage="Quantity is required." ForeColor="Red" ValidationGroup="AddValidations"></asp:RequiredFieldValidator>
</FooterTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "150px" HeaderText = "Rate">
<ItemTemplate>
<asp:Label ID="lblViewRate" runat="server"
Text='<%# Eval("Rate")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEditRate" runat="server" Text='<%# Eval("Rate")%>'></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtEditRate" CssClass="Validators" Display="Dynamic" ControlToValidate="txtEditRate" runat="server"
ErrorMessage="Quantity is required." ForeColor="Red" ValidationGroup="EditValidations"></asp:RequiredFieldValidator>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtAddRate" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtAddRate" CssClass="Validators" Display="Dynamic" ControlToValidate="txtAddRate" runat="server"
ErrorMessage="Rate is required." ForeColor="Red" ValidationGroup="AddValidations"></asp:RequiredFieldValidator>
</FooterTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width = "150px" HeaderText = "Total">
<ItemTemplate>
<asp:Label ID="lblViewTotal" runat="server"
Text='<%# Eval("Total")%>'></asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtEditTotal" runat="server" Text='<%# Eval("Total")%>'></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtEditTotal" CssClass="Validators" Display="Dynamic" ControlToValidate="txtEditTotal" runat="server"
ErrorMessage="Total is required." ForeColor="Red" ValidationGroup="EditValidations"></asp:RequiredFieldValidator>
</EditItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtAddTotal" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="reqtxtAddTotal" CssClass="Validators" Display="Dynamic" ControlToValidate="txtAddTotal" runat="server"
ErrorMessage="Total is required." ForeColor="Red" ValidationGroup="AddValidations"></asp:RequiredFieldValidator>
</FooterTemplate>
<ItemStyle Width="150px" />
</asp:TemplateField>
<asp:TemplateField ItemStyle-Width="80px" HeaderText="Add Item">
<ItemTemplate>
<%--<span onclick="return confirm('Are you sure to Delete the record?')">
<asp:LinkButton ID="lnkB" runat="Server" Text="Delete" CommandName="ItemDelete"></asp:LinkButton>
</span>--%>
<%--<asp:LinkButton ID="lnkRemove" runat="server" OnClick="lnkRemove_Click">Delete</asp:LinkButton>--%>
<asp:LinkButton ID="lnkRemove" runat="server"
CommandArgument='<%#Eval("ItemDetailId")%>' Text="Delete" OnClientClick = "return confirm('Do you want to delete?')"
onclick="DeleteRecord"></asp:LinkButton>
</ItemTemplate>
<FooterTemplate>
<asp:Button ID="btnAdd" runat="server" Text="Add" ValidationGroup="AddValidations"
OnClick = "InsertItemDetails" />
</FooterTemplate>
<ItemStyle Width="80px" />
</asp:TemplateField>
<%--<asp:CommandField ShowDeleteButton="True" ButtonType="Button" HeaderText="Delete Item" />--%>
<asp:CommandField ShowEditButton="True" ValidationGroup="EditValidations" HeaderText="Edit Item" />
</Columns>
</asp:GridView>
下面我正在检索＆＃39; Total＆＃39; coloumn的标签控制值。
protected void OnRowCreated(object sender, GridViewRowEventArgs e)
{
subTotal = 0;
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataTable dt = (e.Row.DataItem as DataRowView).DataView.Table;
int itemId = Convert.ToInt32(dt.Rows[e.Row.RowIndex]["ItemId"]);
total += Convert.ToDouble(dt.Rows[e.Row.RowIndex]["Total"]);
if (itemId != currentId)
{
if (e.Row.RowIndex > 0)
{
for (int i = subTotalRowIndex; i < e.Row.RowIndex; i++)
{
Label lblViewTotal = ((Label)e.Row.Cells[6].FindControl("lblViewTotal")) as Label;
if (lblViewTotal != null && lblViewTotal.Text != string.Empty) //Check whether it is null or not
{
subTotal += Convert.ToDouble(lblViewTotal.Text);
}
}
this.AddTotalRow("Sub Total", subTotal.ToString("N7"));
subTotalRowIndex = e.Row.RowIndex;
}
currentId = itemId;
}
}
}
答案 0 :(得分：0)
我通过处理空条件对您的代码进行了一些修改。请看看。
protected void OnRowCreated(object sender, GridViewRowEventArgs e)
{
subTotal = 0;
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataTable dt = (e.Row.DataItem as DataRowView).DataView.Table;
int itemId = Convert.ToInt32(dt.Rows[e.Row.RowIndex]["ItemId"]);
total += Convert.ToDecimal(dt.Rows[e.Row.RowIndex]["Total"]);
if (itemId != currentId)
{
if (e.Row.RowIndex > 0)
{
for (int i = subTotalRowIndex; i < e.Row.RowIndex; i++)
{
Label lblViewTotal = (Label)e.Row.FindControl("lblViewTotal");//First Get label
if (lblViewTotal != null && lblViewTotal.Text != string.Empty) //Check whether it is null or not
{
subTotal += Convert.ToDecimal(lblViewTotal.Text);
}
}
this.AddTotalRow("Sub Total", subTotal.ToString("N7"));
subTotalRowIndex = e.Row.RowIndex;
}
currentId = itemId;
}
}
}
答案 1 :(得分：0)
你确定在OnDataBound之后OnRowCreated触发了吗？ 当您进行小计时，可能是在阶段没有价值。
尝试使用RowDataBound事件吗？
（自从我做网页表单工作已经有一段时间了，所以这是来自内存，如果我不正确就道歉）