Question

我正在尝试动态创建图像。我得到了图像的链接。

必要的代码：

foreach (String pictureLink in imageLinks)
{
       Image image = new Image();
       image.ImageUrl = pictureLink;
       imagesDiv.Controls.Add(image);
}

但没有任何事情发生..我怎么能这样做或者我做错了什么？关于如何显示图片的样式是Googleimagesearch结果，如..

编辑：还有一件事我会做..当添加占位符（带有图像）时，它们会在所有已加载的图像之后显示，但是可以在添加后立即添加带有图像的占位符吗？

Answer 1

看看这个

Adding asp.net image to div

我认为它应该回答你的问题。

Answer 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Types;
using BOO;
using BOFactory;
using System.Data;
using System.Data.Sql;
using System.Data.SqlClient;

namespace DAL
{
    public class CustomerDAL:ICustomerDAL
    {
        List<ICustomerBO> emplist = new List<ICustomerBO>();
        List<ICustomerBO> llist = new List<ICustomerBO>();


        public List<ICustomerBO> DBbind()
        {

            string connectionstring = ";


            SqlConnection connection = new SqlConnection(connectionstring);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "sp_databinding";
            cmd.Connection = connection;
            SqlDataReader reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                string locn = reader["location"].ToString();
                ICustomerBO loc = new  CustomerBO(locn);
                llist.Add(loc);
            }
            connection.Close();
            return llist;
             }


        public int addemployee(ICustomerBO b)
        {
            string connectionstring = "Server= LENOVO\\SQLEXPRESS, Authentication=Windows Authentication, Database= tempdb";



            SqlConnection connection = new SqlConnection(connectionstring);

            connection.Open();

            SqlCommand command = new SqlCommand();
            command.CommandType = CommandType.StoredProcedure;
            command.CommandText = "sp_addemployee";

            command.Connection = connection;

            command.Parameters.AddWithValue("@employeename", b.empname);
            command.Parameters.AddWithValue("@dob", b.dob);
            command.Parameters.AddWithValue("@location", b.location);
            command.Parameters.AddWithValue("@gender", b.gender);
            command.Parameters.AddWithValue("@doj", b.doj);
            command.Parameters.AddWithValue("@experience", b.experience);
            command.Parameters.AddWithValue("@CTC", b.ctc);
            command.Parameters.AddWithValue("@designation", b.designation);
            command.Parameters.AddWithValue("@unithead", b.unithead);
            command.Parameters.AddWithValue("@projectid",b.projectid);

            command.Parameters.AddWithValue("@id", 0);

            command.Parameters["@id"].Direction = ParameterDirection.Output;

            int rowaffected = command.ExecuteNonQuery();


            connection.Close();

            if(rowaffected>0)
            {
                return rowaffected;
            }

            else
            {
                return 0;
            }                                    
              }

        public bool LOGIN(ICustomerBO l)
        {
            bool flag = false;

            string connectionstring = "Data Source=sql1;" + ";" + "user id=;"
                + "password=tcstvm;";

            SqlConnection connection = new SqlConnection(connectionstring);

            connection.Open();

            SqlCommand command = new SqlCommand();

            command.CommandType = CommandType.StoredProcedure;

            command.CommandText = "sp_loginview";

            command.Connection = connection;

            SqlDataReader reader = command.ExecuteReader();

            while(reader.Read())
            {
                string name = reader["UserName"].ToString();
                string pwd = reader["Password"].ToString();

                if((name==l.name)&&(pwd==l.pwd))
                {
                    flag = true;
                }
            }

             connection.Close();

            return flag;

        }

         public List<ICustomerBO> viewallListBO()
        {

            string ConnectionString = "";

            SqlConnection connection = new SqlConnection(ConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "sp_viewemp7";
            cmd.Connection = connection;
            SqlDataReader reader = cmd.ExecuteReader();
            while (reader.Read())
            {
                int id = Convert.ToInt32(reader["id"]);
                string name = reader["employeename"].ToString();
                DateTime dob = Convert.ToDateTime(reader["dob"]);
                string locn = reader["location"].ToString();
                string gender = reader["gender"].ToString();
                DateTime doj = Convert.ToDateTime(reader["doj"]);
                int exp = Convert.ToInt32(reader["experience"]);
                int ctc = Convert.ToInt32(reader["ctc"]);
                string desg = reader["designation"].ToString();
                string head = reader["unithead"].ToString();
                int proj =Convert.ToInt32( reader["projectid"]);

                ICustomerBO employee=BOFactory.CustomerBOFactory.ADDEMPLOYEE(id, name, dob, locn, gender, doj, exp, ctc, desg, head, proj);
                emplist.Add(employee);

            }
            connection.Close();
            return emplist;
        }


        public bool EDITCustomer(ICustomerBO bb)
         {
             bool flag = false;
             string ConnectionString = "";

             SqlConnection connection = new SqlConnection(ConnectionString);
             connection.Open();
             SqlCommand command = new SqlCommand();
             command.CommandType = CommandType.StoredProcedure;
             command.CommandText = "sp_editemploye";
             command.Connection = connection;
             SqlConnection conn = new SqlConnection();
             command.Parameters.AddWithValue("@id", bb.id);
             command.Parameters.AddWithValue("@employeename", bb.empname);
             command.Parameters.AddWithValue("@dob", bb.dob);
             command.Parameters.AddWithValue("@location", bb.location);
             command.Parameters.AddWithValue("@gender", bb.gender);
             command.Parameters.AddWithValue("@doj", bb.doj);
             command.Parameters.AddWithValue("@experience", bb.experience);
             command.Parameters.AddWithValue("@ctc", bb.ctc);
             command.Parameters.AddWithValue("@designation", bb.designation);
             command.Parameters.AddWithValue("@unithead", bb.unithead);
             command.Parameters.AddWithValue("@projectid", bb.projectid);
             int rowaffected = command.ExecuteNonQuery();
             connection.Close();
             if (rowaffected > 0)
             {
                 flag = true;
             }
             return flag;
         }

        public bool DeleteEmployee(int bbb)
    {
         bool flag = false;
            string ConnectionString = ;

            SqlConnection connection = new SqlConnection(ConnectionString);
            connection.Open();
            SqlCommand command = new SqlCommand();
            command.CommandType = CommandType.StoredProcedure;
            command.CommandText = "sp_deletemploye";
            command.Connection = connection;

            command.Parameters.AddWithValue("@id", bbb);

            int rowaffected = command.ExecuteNonQuery();

            connection.Close();

            if (rowaffected > 0)
            { flag = true; }
            return flag;
}


        public List<ICustomerBO> viewallListsearchBO(int exo)
        {
            string ConnectionString = "Data Source = ;" +
              "Initial Catalog = ;"
              + "User id=;"
              + "Password=password;";

            SqlConnection connection = new SqlConnection(ConnectionString);
            connection.Open();
            SqlCommand cmd = new SqlCommand();
            cmd.Parameters.AddWithValue("@id", exo);
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "sp_searchemployee";
            cmd.Connection = connection;
            SqlDataReader reader = cmd.ExecuteReader();



            while (reader.Read())
            {
                int id = Convert.ToInt32(reader["id"]);
                string name = reader["employeename"].ToString();
                DateTime dob = Convert.ToDateTime(reader["dob"]);
                string locn = reader["location"].ToString();
                string gender = reader["gender"].ToString();
                DateTime doj = Convert.ToDateTime(reader["doj"]);
                int exp = Convert.ToInt32(reader["experience"]);
                int ctc = Convert.ToInt32(reader["ctc"]);
                string desg = reader["designation"].ToString();
                string head = reader["unithead"].ToString();
                int proj = Convert.ToInt32(reader["projectid"]);

                ICustomerBO employee = BOFactory.CustomerBOFactory.ADDEMPLOYEE(id, name, dob, locn, gender, doj, exp, ctc, desg, head, proj);
                emplist.Add(employee);

            }
            connection.Close();
            return emplist;
        }
    }
}
====================================================================================================================================using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using BOO;
using DAL;
using Types;

namespace DALFactory
{
    public class CustomerDALFactory
    {
        public static ICustomerDAL addcustomer()
        {
            ICustomerDAL adddal = new CustomerDAL();
            return adddal;
        }

        public static ICustomerDAL LOGIN()
        {
            ICustomerDAL obj = new CustomerDAL();
            return obj;
        }

        public static List<ICustomerBO>  viewalllist()
        {
            ICustomerDAL cust=new CustomerDAL();
            List<ICustomerBO> cust1 = cust.viewallListBO();
            return cust1;
        }

        public static ICustomerDAL EditCustomer()
        {
            ICustomerDAL d = new CustomerDAL();
            return d;
        }

        public static ICustomerDAL deletecustomer()
        {
            ICustomerDAL e = new CustomerDAL();
            return e;
        }      
        public static List<ICustomerBO> DBBIND()
        {
            ICustomerDAL obj5 = new CustomerDAL();
            List<ICustomerBO> emp1 = obj5.DBbind();
            return emp1;
        }

        public static List<ICustomerBO> viewsearchlist(int exo)
        {
            ICustomerDAL cust = new CustomerDAL();
            List<ICustomerBO> cust1 = cust.viewallListsearchBO(exo);
            return cust1;
        }






        }
}
============================================================================================================================================
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Types;

using BOFactory;
using BLLFactory;
using DALFactory;

namespace miniproject
{
    public partial class AddEmployee : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            this.UnobtrusiveValidationMode = System.Web.UI.UnobtrusiveValidationMode.None;
            if (!IsPostBack)

            {

                ICustomerBLL bllobj1 = BLLFactory.CustomerBLLFactory.dbind();  //dbind();
                List<ICustomerBO> list = bllobj1.dbbind();
                DropDownList5.DataSource = list;
                DropDownList5.DataTextField = "location";
                DropDownList5.DataValueField = "location";
                DropDownList5.DataBind();

            }
        }
        protected void TextBox6_TextChanged(object sender, EventArgs e)
        {
            double a = Convert.ToInt32(TextBox6.Text);

            if (a == 0)
            {

                RangeValidator3.MaximumValue = "3";
                RangeValidator3.MinimumValue = "1.5";

                RangeValidator3.Type = ValidationDataType.Double;
                RangeValidator3.Validate();
                if (!RangeValidator3.IsValid)
                {

                    RangeValidator3.ErrorMessage = "Enter CTC between 1.5 and 3";
                }
            }
            else
            {
                double max = (a * 1.5) + 3;
                double min = (a * 1.5) + 1.5;
                RangeValidator3.MaximumValue = max.ToString();
                RangeValidator3.MinimumValue = min.ToString();
                RangeValidator3.Type = ValidationDataType.Double;
                RangeValidator3.Validate();

                if (!RangeValidator3.IsValid)
                {
                    RangeValidator3.ErrorMessage = "Enter CTC between " + min + " and " + max;
                }
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string empname = TextBox1.Text;
            DateTime dob = Convert.ToDateTime(TextBox2.Text);
            string location = DropDownList5.SelectedItem.Text;
            string gender = RadioButtonList3.SelectedItem.Text;
            DateTime doj = Convert.ToDateTime(TextBox4.Text);
            int experience = Convert.ToInt32(TextBox6.Text);
            int ctc = Convert.ToInt32(TextBox5.Text);
            string designation = DropDownList4.SelectedItem.Value;
            string unithead = DropDownList1.SelectedItem.Text;
            int projectid = Convert.ToInt32(DropDownList2.SelectedItem.Text);

            ICustomerBLL bllobj = BLLFactory.CustomerBLLFactory.Addcustomer();

            ICustomerBO boobj = BOFactory.CustomerBOFactory.Addcustomer( empname,dob, location, gender, doj, experience,ctc,
             designation, unithead,projectid);

            int rowaffected = bllobj.AddCustomer(boobj);

            if(rowaffected>0)
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "call function", "alert('ADDED SUCCESSFULLY.ID=" + rowaffected + "');", true);
            }
            else
            {
                Response.Write("<script>alert('customer not added ')</script>");
            }
           }

        protected void DropDownList5_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        protected void TextBox4_TextChanged(object sender, EventArgs e)
        {

        }
    }
}
================================================================================================================================

                           </tr>
                       </table>

  </asp:Content>
========================================================================================================================================================

using Types;
using DALFactory;
using BOFactory;
using BLLFactory;
namespace miniproject
{
    public partial class EditEmployee : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!IsPostBack)
            {
                viewdata();
            }
        }
        private void viewdata()
        {
            List<ICustomerBO> emp = DALFactory.CustomerDALFactory.viewalllist();
            GridView1.DataSource = emp;
            GridView1.DataBind();
        }
        protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
        {

            GridView1.EditIndex = -1;
            viewdata();

        }

        protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
        {
            Label lbid = (Label)GridView1.Rows[e.RowIndex].FindControl("Label1") as Label;

            ICustomerBLL bllobj1 = BLLFactory.CustomerBLLFactory.DeleteEmployee();
            int id = Convert.ToInt32(lbid.Text);
            bool rowaffected = bllobj1.deleteemployee(id);
            GridView1.EditIndex = -1;
            viewdata();
        }

        protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
        {
            GridView1.EditIndex = e.NewEditIndex;
            viewdata();
        }

        protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
        {


        }

        protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
        {



        }

        protected void GridView1_RowUpdating1(object sender, GridViewUpdateEventArgs e)
        {

            GridViewRow SelectedRow = GridView1.Rows[e.RowIndex];
            Label lbid = (Label)SelectedRow.FindControl("Label1") as Label;
            string Name = (SelectedRow.FindControl("TextBox1") as TextBox).Text;
            DateTime dob = Convert.ToDateTime((SelectedRow.FindControl("TextBox2") as TextBox).Text);
            string Location = (SelectedRow.FindControl("TextBox3") as TextBox).Text;
            string gender = (SelectedRow.FindControl("TextBox4") as TextBox).Text;
            DateTime doj = Convert.ToDateTime((SelectedRow.FindControl("TextBox5") as TextBox).Text);
            int exp = Convert.ToInt32((SelectedRow.FindControl("TextBox6") as TextBox).Text);
            int ctc = Convert.ToInt32((SelectedRow.FindControl("TextBox7") as TextBox).Text);
            string Designation = (SelectedRow.FindControl("TextBox8") as TextBox).Text;
            string Headid = (SelectedRow.FindControl("TextBox9") as TextBox).Text;
            int projid = Convert.ToInt32((SelectedRow.FindControl("TextBox10") as TextBox).Text);

            int id = int.Parse(lbid.Text);
            string name = Name.ToString();
            DateTime dob1 = Convert.ToDateTime(dob);
            string locn = Location.ToString();
            string gen = gender.ToString();
            DateTime doj1 = Convert.ToDateTime(doj);
            int expr = Convert.ToInt32(exp);
            int ctc1 = Convert.ToInt32(ctc);
            string desg = Designation.ToString();
            string head1 = Headid.ToString();
            int proj1 = Convert.ToInt32(projid);

            ICustomerBO boobj = BOFactory.CustomerBOFactory.EditCustomer(id, name, dob1, locn, gen, doj1, expr, ctc1, desg, head1, proj1);
            ICustomerBLL bllobj = BLLFactory.CustomerBLLFactory.EditEmployee();
            bool success = bllobj.editemployee(boobj);

            GridView1.EditIndex = -1;
            viewdata();

        }

        protected void GridView1_SelectedIndexChanged1(object sender, EventArgs e)
        {
            GridViewRow SelectedRow = GridView1.SelectedRow;
            Label lbid = (Label)SelectedRow.FindControl("Label1") as Label;
            string Name = (SelectedRow.FindControl("Label2") as Label).Text;
            DateTime dob = Convert.ToDateTime((SelectedRow.FindControl("Label3") as Label).Text);
            string Location = (SelectedRow.FindControl("Label4") as Label).Text;

            int projid = Convert.ToInt32((SelectedRow.FindControl("Label11") as Label).Text);
            int id = Convert.ToInt32(lbid.Text);

            Session["EmployeeID"] = id;
            Session["EmployeeName"] = Name;

            Session["CTC"] = ctc;
            Session["DESIGNATION"] = Designation;
            Session["HEADID"] = Headid;
            Session["PROJECTID"] = projid;
            Response.Redirect("Update.aspx");
        }
    }
}

==================================================================================================================================
<%@ Page Title="" Language="C#" MasterPageFile="~/Master.Master" AutoEventWireup="true" CodeBehind="EditEmployee.aspx.cs" Inherits="miniproject.EditEmployee" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceholder1" runat="server">

    <div  style="margin: left:25%">
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCancelingEdit="GridView1_RowCancelingEdit" OnRowDeleting="GridView1_RowDeleting" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating1" OnSelectedIndexChanged="GridView1_SelectedIndexChanged1">
        <Columns>
            <asp:TemplateField HeaderText="ID">
                <ItemTemplate>
                    <asp:Label ID="Label1" runat="server" Text='<%# Eval("id") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="EmployeeName">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox1" runat="server" Text='<%# Eval("empname") %>'></asp:TextBox>
                </EditItemTemplate>
                <ItemTemplate>
                    <asp:Label ID="Label2" runat="server" Text='<%# Eval("empname") %>'></asp:Label>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="DateOfBirth">
                <EditItemTemplate>
                    <asp:TextBox ID="TextBox2" runat="server" Text='<%# Eval("dob") %>'></asp:TextBox>

            <asp:CommandField EditText="Select" HeaderText="Action" ShowSelectButton="True" />
            <asp:CommandField EditText="Delete" HeaderText="Action" ShowDeleteButton="True" />
            <asp:CommandField HeaderText="Action" ShowEditButton="True" />
        </Columns>

    </asp:GridView>
        </div>

</asp:Content>
===================================================================================================================================================================





using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace DAL
{
    public class DBUtility
    {
        public static SqlConnection getconnection()
        {

           SqlConnection dbconnection = null;
            ConnectionStringSettings settings = ConfigurationManager.ConnectionStrings["constr"];
            if(settings!=null)
            {
                string str = settings.ConnectionString;
                dbconnection = new SqlConnection(str);
            }
            return dbconnection;
        }
    }
}
============================================================================================================================
 public int updatesupplier(ISupplierBO objBO)
     {
         int ret = 0;
         SqlConnection conn = DBUtility.getconnection();
         conn.Open();
         SqlCommand cmd = new SqlCommand();
         cmd.CommandType = CommandType.StoredProcedure;
         cmd.CommandText = "sp_Updatesupplier";
         cmd.Connection = conn;

         cmd.Parameters.AddWithValue("@Supplierid",objBO.Suplierid);
         cmd.Parameters.AddWithValue("@Companyname", objBO.Companyname);
         cmd.Parameters.AddWithValue("@Contactname", objBO.Contactname);
         cmd.Parameters.AddWithValue("@Companyaddress", objBO.Companyaddress);
         cmd.Parameters.AddWithValue("@City", objBO.City);
         cmd.Parameters.AddWithValue("@Country", objBO.Country);
         cmd.Parameters.AddWithValue("@Homepage", objBO.Homepage);
         cmd.Parameters.AddWithValue("@Contactno", objBO.Contactno);
         cmd.Parameters.AddWithValue("@Emailaddress", objBO.Emailaddress);
         cmd.Parameters.AddWithValue("@Bankdetails", objBO.Bankdetails);
         cmd.Parameters.AddWithValue("@Accountno", objBO.Accountno);
         ret = cmd.ExecuteNonQuery();
         conn.Close();

         return ret;

     }

======================================================================================================================================
<connectionStrings>
    <add name="constr" connectionString="Data Source=sql01;Initial Catalog=dbtemp;User ID=vishal;Password=mahesh" providerName="System.Data.SqlClient"/>
  </connectionStrings>
=====================================================================================================================================

        <asp:TemplateField HeaderText="UnitHead">
            <ItemTemplate>
                <asp:Label ID="Label10" runat="server" Text='<%# Eval("unithead") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="ProjectID">
            <ItemTemplate>
                <asp:Label ID="Label11" runat="server" Text='<%# Eval("projectid") %>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>

</asp:GridView>
        <asp:Label ID="Label12" runat="server" Text="Enter ID to search"></asp:Label>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Search" OnClick="Button1_Click" />
         <asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="False" OnPageIndexChanging="GridView1_PageIndexChanging" PageIndex="5" AllowPaging="True" PageSize="5">



===================================================================================================================================

using Types;
using DALFactory;
using BOFactory;

namespace miniproject
{
    public partial class ViewEmployee : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            BindData();
        }

        protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            GridView1.PageIndex = e.NewPageIndex;
            BindData();
        }
        private void BindData()
        {
            List<ICustomerBO> emp = DALFactory.CustomerDALFactory.viewalllist();
            GridView1.DataSource = emp;
            GridView1.DataBind();



            }

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            int x = Convert.ToInt16(TextBox1.Text);
            List<ICustomerBO> empc = DALFactory.CustomerDALFactory.viewsearchlist(x);
            GridView2.DataSource = empc;
            GridView2.DataBind();
        }
    }
}

C＃（ASP.NET） - 动态创建映像？

2 个答案: