显示数据表格row.Cells[我].在错误的Cell中查找控件
本文关键字：错误 Cell 控件 查找 数据表 数据 表格 row Cells 显示 | 更新日期: 2023-09-27 17:53:21
我写了一个函数，你在gridview行中传递，以及你试图定位的控件类型。它按预期找到控件，但是，它在不正确的单元格中找到它。
protected int GetCell(GridViewRow row, string strSection)
{
int intVal = 0;
for (int i = 0; i < row.Cells.Count; i++)
{
intVal = i;
if (strSection == "QueryRate")
{
DropDownList cmbQueryType = row.Cells[i].FindControl("cmbQueryType") as DropDownList;
if (cmbQueryType != null)
{
break;
}
}
else if (strSection == "Name")
{
TextBox txtName = row.Cells[i].FindControl("txtName") as TextBox;
if (txtName != null)
{
break;
}
}
}
return intVal;
}
根据我的理解，直接来自Microsoft页面:搜索当前命名容器，查找具有指定id参数的服务器控件。
所以我的问题是，为什么这似乎是发现控制是错误的列?我不能硬编码特定的列，因为显示的列根据数据源而变化。
每个请求，gridview:
<TDWeb:PageGridView SkinID="pagegrid" EmptyDataText="No unmatched parameters." ID="gvUnmatched" runat="server" AllowSorting="True"
OnSorting="gvUnmatched_Sorting" AutoGenerateColumns="False" OnRowDataBound="gvUnmatched_RowDatabound" OnDataBound="gvUnmatched_DataBound"
OnPreRender="gvUnmatched_PreRender" OnPageIndexChanging="OnFilterUnmatched" DataKeyNames="InternalName"
ShowFooter="true" OnPageSizeChanged="gvUnmatched_PageSizeChanged">
<Columns>
<asp:TemplateField runat="server" ItemStyle-CssClass="c" FooterStyle-CssClass="c">
<HeaderTemplate>
<asp:Label runat="server" Text="Add" />
<asp:CheckBox runat="server" ID="ckbAddAll" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox runat="server" ID="ckbAdd" EnableViewState="true" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" ItemStyle-CssClass="c">
<HeaderTemplate>
<asp:Label runat="server" Text="Ignore" />
<asp:CheckBox runat="server" ID="ckbIgnoreAll" />
</HeaderTemplate>
<ItemTemplate>
<asp:CheckBox runat="server" ID="ckbIgnore" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" HeaderText="Name" SortExpression="Name" ItemStyle-CssClass="l">
<HeaderTemplate>
<asp:LinkButton runat="server" Text="Name" CommandName="Sort" CommandArgument="Name" />
<td:HelperBox ID="HelperBox5" runat="server" ToolTipText="Set the Name for this parameter. This value must be unique to the CAN Bus or ECU and is the value used throughout the DAP system to reference this parameter." />
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox runat="server" ID="txtName" Width="250" MaxLength="256" style="background-color:inherit" Text='<%# Bind("Name") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" ItemStyle-CssClass="l" SortExpression="Description">
<HeaderTemplate>
<asp:LinkButton runat="server" Text="Description" CommandName="Sort" CommandArgument="Description" />
<td:HelperBox ID="HelperBox4" runat="server" ToolTipText="Set the Description for this parameter. This value is for informational purposes only. Not required." />
</HeaderTemplate>
<ItemTemplate>
<asp:TextBox runat="server" ID="txtDescription" Width="175" MaxLength="500"
TextMode="multiline" style="background-color:inherit" Text='<%# Bind("Description") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" HeaderText="Length (bits)" SortExpression="LengthBits" ItemStyle-CssClass="r">
<ItemTemplate>
<asp:Label runat="server" ID="txtSizeBits" Text='<%# (int)Eval("LengthBits") + (int)Eval("LengthBytes") * 8 %>' style="background-color:inherit" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" AccessibleHeaderText="SourceAddress" HeaderText="SA" SortExpression="Sources" ItemStyle-CssClass="r">
<ItemTemplate>
<asp:Label runat="server" ID="txtSources" Text='<%# Eval("SourceString") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" AccessibleHeaderText="ID" HeaderText="ID/Address" SortExpression="IDorAddress" ItemStyle-CssClass="r">
<ItemTemplate>
<asp:Label runat="server" ID="txtIDorAddress" Text='<%# Eval("IDorAddress") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" HeaderText="Data Type" SortExpression="Datatype" ItemStyle-CssClass="l">
<ItemTemplate>
<asp:Label runat="server" ID="txtDatatype" Text='<%# Bind("Datatype") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" AccessibleHeaderText="QueryRate" ItemStyle-CssClass="r" SortExpression="QueryRate" HeaderText="Query Rate">
<HeaderTemplate>
<asp:Label runat="server" Text="Rate" />
<td:HelperBox ID="HelperBox9" runat="server" ToolTipText="Set the Query Type and Rate for this parameter (if applicable). If set, this value overrides the default Query set below." />
</HeaderTemplate>
<ItemTemplate>
<asp:Label runat="server" ID="lblCANRate" Text='<%# Eval("QueryRateString", "{0} s") %>' Visible='<%# m_SelectedFile.ImportType == App_Code.DAPConfig.ParameterFileImport.EImportType.CANDBC || (m_SelectedFile.ImportType == App_Code.DAPConfig.ParameterFileImport.EImportType.J1939DBC && ((int)Eval("QueryRate")) > 0) %>' />
<asp:DropDownList runat="server" ID="cmbQueryType" style="background-color:inherit" Visible='<%# m_SelectedFile.ImportType != App_Code.DAPConfig.ParameterFileImport.EImportType.CANDBC && (m_SelectedFile.ImportType != App_Code.DAPConfig.ParameterFileImport.EImportType.J1939DBC || (int)Eval("QueryRate") <= 0) %>' />
<asp:Panel runat="server" id="pnlRate" style="display:none" ><asp:TextBox runat="server" ID="txtRate" Width="50" MaxLength="6" style="background-color:inherit" />s</asp:Panel>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField runat="server" HeaderText="Category" ItemStyle-CssClass="l">
<HeaderTemplate>
<asp:Label runat="server" Text="Category" />
<td:HelperBox ID="HelperBox10" runat="server" ToolTipText="Set the Category with which to group this parameter, or create a new category." />
</HeaderTemplate>
<ItemTemplate>
<asp:DropDownList runat="server" ID="cmbCategory" style="background-color:inherit" >
<asp:ListItem Value="_New_" Text="Add New..." />
</asp:DropDownList>
<br />
<asp:TextBox Width="100" MaxLength="50" runat="server" ID="txtCategory" style="display:none;background-color:inherit" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</TDWeb:PageGridView>
![显示数据表格row.Cells[我].在错误的Cell中查找控件](/d/file/img/3/22202.jpg)
ok -结果是调用row.cells(0).FindControl("")相当于调用row.FindControl("")，因为FindControl()在当前的NamingContainer中操作。一行中所有的细胞都有相同的NamingContainer，特别是{System.Web.UI.WebControls.GridViewRow}
如果您需要的只是确定给定控件的列索引，请尝试以下操作(原谅VB):
Public Function getCellIndexByName(ByVal row As GridViewRow, ByVal ColumnName As String) As Integer
For ci As Integer = 0 To row.Cells.Count - 1
If CType(row.Cells(ci), DataControlFieldCell).ContainingField.ToString() = ColumnName Then
Return ci
End If
Next
Return -1
End Function
如果您知道要查找的控件的ID，则不需要指定单元格。你可以在整行中找到它。
DropDownList cmbQueryType = row.FindControl("cmbQueryType") as DropDownList
这样可以避免单元格索引不正确的问题。