无法从gridview内的templateField中的文本框中获取值

Question

对于之前的代码抱歉.有人可以帮忙吗？我有一个gridview GridView1,PageLoad()通过从包含三列的Excel工作表导入填充:

1. 日期
2. 顾客
3. PayingBookNoOrDD

这张纸有五排.用户可以编辑页面上文本框中的数据(下面的标记).编辑后,当用户点击提交按钮时,我需要从所有文本框中获取这些新值,并从GridView填充的位置更新相同的Excel工作表.

我创建了三个字符串数组:dateArray,custArray并payingInBookArray存储这些新值.但是当我运行应用程序时,所有三个数组都是空的.

标记:

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" DataKeyNames="Date,Customers,PayingInBookNoOrDD" >
    <Columns>
    <asp:TemplateField>
        <HeaderTemplate>Date</HeaderTemplate>
        <ItemTemplate>
            <asp:TextBox runat="server" ID="txtDate" Text='<%# Bind("Date") %>'></asp:TextBox>
        </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField>
        <HeaderTemplate>Customers</HeaderTemplate>
        <ItemTemplate>
            <asp:TextBox runat="server" ID="txtCustomers" Text='<%# Bind("Customers") %>'></asp:TextBox>
        </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField>
        <HeaderTemplate>PayingInBookNoOrDD</HeaderTemplate>
        <ItemTemplate>
            <asp:TextBox runat="server" ID="txtPayingInBookNoOrDD" Text='<%# Bind("PayingInBookNoOrDD") %>'></asp:TextBox>
        </ItemTemplate>
    </asp:TemplateField>
    </Columns>
</asp:GridView>

<asp:Button ID="txtSubmit" runat="server" Text="Submit" onclick="txtSubmit_Click" />

代码隐藏:

protected void Page_Load(object sender, EventArgs e)
{
    string selectQuery = "SELECT * FROM [Month1$B2:D5]";
    OleDbConnection conn = new OleDbConnection(connString);

    conn.Open();

    OleDbDataAdapter da = new OleDbDataAdapter(selectQuery, conn);
    DataSet ds = new DataSet();
    da.Fill(ds);

    GridView1.DataSource = ds;
    GridView1.DataBind();

    conn.Close();
    da.Dispose();
    conn.Dispose();
}

protected void txtSubmit_Click(object sender, EventArgs e)
{
    IList<string> DateArray = new List<string>();
    IList<string> custArray = new List<string>();
    IList<string> payInBookArray = new List<string>();

    foreach (GridViewRow gr in GridView1.Rows)
    {
        TextBox lblDate = (TextBox)gr.Cells[0].FindControl("txtDate");
        DateArray.Add(lblDate.Text);

        TextBox lblCustomers = (TextBox)gr.Cells[1].FindControl("txtCustomers");
        custArray.Add(lblCustomers.Text);

        TextBox lblPayInBookNo = (TextBox)gr.Cells[2].FindControl("txtPayingInBookNoOrDD");
        payInBookArray.Add(lblPayInBookNo.Text);
    }

    ExportToExcel(DateArray.ToArray(), custArray.ToArray(), payInBookArray.ToArray()); 

}

如果有人有解决方案,请告诉我.

谢谢.

Answer 1

对 Page_Load 事件添加回发检查。我看不出您的 btn_Submit 代码有任何问题。

protected void Page_Load(object sender, EventArgs e)
{
    if(!this.IsPostBack){
         string selectQuery = "SELECT * FROM [Month1$B2:D5]";
         OleDbConnection conn = new OleDbConnection(connString);
         conn.Open();
         OleDbDataAdapter da = new OleDbDataAdapter(selectQuery, conn);
         DataSet ds = new DataSet();
         da.Fill(ds);
         GridView1.DataSource = ds;
         GridView1.DataBind();
         conn.Close();
         da.Dispose();
         conn.Dispose();
    }
}