动态加载Gridview不显示和数据

Question

我正在尝试从从 Active Directory 检索到的数据加载网格。我已经设置了 GridView，如下所示。问题是正在创建记录但没有显示数据

<asp:gridview ID="Gridview1" runat="server" ShowFooter="true" AutoGenerateColumns="false" AllowPaging="True" Visible="false"
    BackColor="White" BorderColor="#3366CC" BorderStyle="None" BorderWidth="1px" CellPadding="4" 
    style ="z-index: 2; left: 65px; top:355px; position: absolute; height: 221px; width: 1158px">
    <Columns>
        <asp:BoundField DataField="RowNumber" HeaderText="Row Number" />
        <asp:TemplateField HeaderText="Employee No">
            <ItemTemplate>
                <asp:Label ID="EmployeeNo" runat="server" style="color:blue"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:Label ID="DisplayName" runat="server"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Department">
            <ItemTemplate>
                 <asp:Label ID="Department" runat="server"></asp:Label>
            </ItemTemplate>           
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Job Title">
            <ItemTemplate>
                <asp:Label ID="JobTitle" runat="server"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Manager">
            <ItemTemplate>
                <asp:Label ID="Manager" runat="server"></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Employee ID">
            <ItemTemplate>
                 <asp:Label ID="Name" runat="server"></asp:Label>
            </ItemTemplate>           
        </asp:TemplateField>
    </Columns>
</asp:gridview>

我运行收集活动数据之前的下面的函数

    private void SetInitialRow()
    {
        DataTable dt = new DataTable();
        DataRow dr = null;
        dt.Columns.Add(new DataColumn("RowNumber", typeof(string)));
        dt.Columns.Add(new DataColumn("EmployeeNo", typeof(string)));
        dt.Columns.Add(new DataColumn("DisplayName", typeof(string)));
        dt.Columns.Add(new DataColumn("Department", typeof(string)));
        dt.Columns.Add(new DataColumn("JobTitle", typeof(string)));
        dt.Columns.Add(new DataColumn("Manager", typeof(string)));
        dt.Columns.Add(new DataColumn("Name", typeof(string)));
        dr = dt.NewRow();
        dr["RowNumber"] = 1;
        dr["EmployeeNo"] = string.Empty;
        dr["DisplayName"] = string.Empty;
        dr["Department"] = string.Empty;
        dr["JobTitle"] = string.Empty;
        dr["Manager"] = string.Empty;
        dr["Name"] = string.Empty;
        dt.Rows.Add(dr);
        //dr = dt.NewRow();

        //Store the DataTable in ViewState
        ViewState["CurrentTable"] = dt;

        Gridview1.DataSource = dt;
        Gridview1.DataBind();
    }

然后我这样声明我的 DataTable

 SetInitialRow();
 DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
 DataRow drCurrentRow = null;

然后我遍历活动数据记录

for (int i = 0; i < MyVars.NoOfADRecords; i++)
{
    Label empNo = (Label)Gridview1.Rows[i].Cells[1].FindControl("EmployeeNo");
    Label displayName =(Label)Gridview1.Rows[i].Cells[2].FindControl("DisplayName");
    Label dept =(Label)Gridview1.Rows[i].Cells[3].FindControl("Department");
    Label jobTitle = (Label)Gridview1.Rows[i].Cells[1].FindControl("JobTitle");
    Label manager = (Label)Gridview1.Rows[i].Cells[2].FindControl("Manager");
    Label name = (Label)Gridview1.Rows[i].Cells[3].FindControl("Name");

    drCurrentRow = dtCurrentTable.NewRow();
    drCurrentRow["RowNumber"] = i;

    empNo.Text = MyVars.ADEmployeeID[i];
    displayName.Text = MyVars.ADName[i];
    dept.Text = MyVars.ADDepartment[i];
    jobTitle.Text = MyVars.ADJobtitle[i];
    manager.Text = MyVars.ADManager[i];
    name.Text = MyVars.ADName[i];

    dtCurrentTable.Rows[i]["EmployeeNo"] = empNo.Text;
    dtCurrentTable.Rows[i]["DisplayName"] = displayName.Text;
    dtCurrentTable.Rows[i]["Department"] = dept.Text;
    dtCurrentTable.Rows[i]["JobTitle"] = jobTitle.Text;
    dtCurrentTable.Rows[i]["Manager"] = manager.Text;
    dtCurrentTable.Rows[i]["Name"] = name.Text;

    dtCurrentTable.Rows.Add(drCurrentRow);
    ViewState["CurrentTable"] = dtCurrentTable;
}

现在它在第一个循环中崩溃，如果我像这样用 0 替换 i

(Label)Gridview1.Rows[0].Cells[1].FindControl("EmployeeNo");

它有效，但尽管所有记录都显示但没有数据。当我单步调试 empNo.text 等代码时，它们都有值，那么我做错了什么？

Answer 1

您正在向数据表中添加空行。替换下面的代码以将行添加到数据表

    drCurrentRow["EmployeeNo"] = empNo.Text;
    drCurrentRow["DisplayName"] = displayName.Text;
    drCurrentRow["Department"] = dept.Text;
    drCurrentRow["JobTitle"] = jobTitle.Text;
    drCurrentRow["Manager"] = manager.Text;
    drCurrentRow["Name"] = name.Text;

    dtCurrentTable.Rows.Add(drCurrentRow);
    ViewState["CurrentTable"] = dtCurrentTable;

而不是你的代码

    dtCurrentTable.Rows[i]["EmployeeNo"] = empNo.Text;
        dtCurrentTable.Rows[i]["DisplayName"] = displayName.Text;
        dtCurrentTable.Rows[i]["Department"] = dept.Text;
        dtCurrentTable.Rows[i]["JobTitle"] = jobTitle.Text;
        dtCurrentTable.Rows[i]["Manager"] = manager.Text;
        dtCurrentTable.Rows[i]["Name"] = name.Text;
dtCurrentTable.Rows.Add(drCurrentRow);
    ViewState["CurrentTable"] = dtCurrentTable;

Answer 2

您正在 SetInitialRow 方法中绑定 DataTable。当您在那里绑定时，它只会将一个空行添加到 GridView。您应该在循环之后进行数据绑定以获得所有用户...

其次，您尝试在 GridView 中找到 none 的控件，然后转换为 Label，设置来自 MyVars.NoOfADRecords 的标签文本并将它们添加到 DataTable。最好像下面的代码片段一样将值直接添加到 DataTable。

for (int i = 0; i < MyVars.NoOfADRecords; i++)
{
    drCurrentRow["EmployeeNo"] = MyVars.ADEmployeeID[i];
    drCurrentRow["DisplayName"] = MyVars.ADName[i];

    dtCurrentTable.Rows.Add(drCurrentRow);
}

Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
ViewState["CurrentTable"] = dtCurrentTable;

但是如果你想去掉很多不必要的代码，就这样做：

Gridview1.DataSource = MyVars.NoOfADRecords;
Gridview1.DataBind();

<ItemTemplate>
    <%# Eval("EmployeeNo") %>
</ItemTemplate>

Answer 3

我认为您的问题可能只是您调用 GridView1.DataBind() 太早了。将所有行添加到 dtCurrentTable 后，尝试调用 GridView1.DataBind() last。

动态加载Gridview不显示和数据

Dynamically loading Gridview not displaying and data

html

c#

asp.net

datatable

gridview