列表视图项目模板中的选定复选框未存储

时间:2018-10-22 17:01:16

标签: c# asp.net webforms

我正在尝试使用asp:checkbox将选定的行存储到CourseParticipants表中,但是没有将选定的记录存储到数据库中。没有显示错误,但刷新到同一页面并显示已检查的记录。我正在尝试选择用户。 先感谢您!

以下是标记:

<table class="table table-hover">
    <thead style="background-color: #92d36e">
        <tr>
            <td><b>Employee Name</b></td>
            <td><b>Position</b></td>
            <td><b>Actions</b></td>
        </tr>
    </thead>
    <tbody>
        <asp:ListView ID="lvEmployees" runat="server" OnPagePropertiesChanging="lvEmployees_PagePropertiesChanging" OnDataBound="lvEmployees_DataBound">
            <ItemTemplate>
                <tr>
                    <td><%# Eval("FirstName")%>,<%# Eval("LastName")%></td>
                    <td><%# Eval("Position")%></td>
                    <td><asp:CheckBox ID="cbEmployee" runat="server" />
                                        </a></td>
                </tr>
            </ItemTemplate>
        </asp:ListView>
    </tbody>
</table>
<asp:Button ID="btnAddParticipants" runat="server"
            class="btn btn-success" OnClick="btnAddParticipants_Click"
            Text="Add Participants" />

这是C#

void GetEmployees()
{
    using (SqlConnection con = new SqlConnection(Helper.GetCon()))
    {
        con.Open();
        string query = @"SELECT EmployeeID, FirstName, LastName, Position FROM Employees";
        using (SqlCommand cmd = new SqlCommand(query, con))
        {
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds, "EmployeeID");
            lvEmployees.DataSource = ds;
            lvEmployees.DataBind();
            con.Close();
        }
    }
}

protected void btnAddParticipants_Click(object sender, EventArgs e)
{
    foreach (ListViewDataItem item in this.lvEmployees.Items)
    {
        string idValue = lvEmployees.DataKeys[item.DataItemIndex].Value.ToString();
        if (item.ItemType == ListViewItemType.DataItem)
        {
            CheckBox cb = (CheckBox)item.FindControl("cbEmployee");
            if (cb.Checked)
            {
                using (SqlConnection con = new SqlConnection(Helper.GetCon()))
                {
                    con.Open();
                    string query = @"INSERT INTO CourseParticipants VALUES (@TrainingModuleID, @EmployeeID, @Active, @DateAdded)";
                    using (SqlCommand cmd = new SqlCommand(query, con))
                    {
                        cmd.Parameters.AddWithValue("@TrainingModuleID", txtCourseID.Text);
                        cmd.Parameters.AddWithValue("@EmployeeID", idValue);
                        cmd.Parameters.AddWithValue("@Active", 1);
                        cmd.Parameters.AddWithValue("@DateAdded", DateTime.Now);
                        cmd.ExecuteNonQuery();
                        con.Close();
                    }
                }
            }
        }
    }
}

1 个答案:

答案 0 :(得分:0)

如果始终要插入DateTime.Now,则可以使用getdate()函数:

string query = @"INSERT INTO CourseParticipants VALUES (@TrainingModuleID, @EmployeeID, @Active, getdate())";

using (SqlCommand cmd = new SqlCommand(query, con))
{
    cmd.Parameters.AddWithValue("@TrainingModuleID", txtCourseID.Text);
    cmd.Parameters.AddWithValue("@EmployeeID", idValue);
    cmd.Parameters.AddWithValue("@Active", 1);
    cmd.ExecuteNonQuery();
}

但这是特定于数据库的,那么您正在使用什么数据库? https://docs.microsoft.com/en-us/sql/t-sql/functions/getdate-transact-sql?view=sql-server-2017

我还将根据您的数据库方案将txtCourseID.Text转换/转换为整数(32或64)。只是为了确保它是一个OK值...而不是字符串(nvarchar)。 我还删除了连接的关闭部分,因为它位于using块中。