我需要在 aspx web 表单页面中将数据库中的数据显示到我的 gridview
I need to Show the data from database into my gridview on aspx webform page
我想从 sql 服务器数据库中获取数据并将其显示到我在我的 aspx 网络表单页面上创建的 gridview 中，但它并没有获取它而是抛出了一个错误 **A在所选数据源上找不到名称为 'Name' 的字段或 属性。
** 我的数据库中已经有一个数据行，列名下有值，我已经在我的代码中创建了 gridview 列，但这似乎 work.Please 没有帮助我完成这个 problem.Below 是我的完整代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication5.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
Welcome To My First Web Form<br />
<h1> Candidate Registration Form</h1>
<br />
<br />
Applicant's Name:
<asp:TextBox ID="TextBox1" runat="server" CausesValidation="True" EnableViewState="False" ValidateRequestMode="Enabled"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="Please enter Your Name!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label1" runat="server" Text="Applicant's FName"></asp:Label>
:
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox2" ErrorMessage="Please enter your Father name!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label3" runat="server" Text="Gender"></asp:Label>: <asp:RadioButtonList ID="gender" RepeatDirection="Horizontal" runat="server" Width="141px" RepeatLayout="Flow"> <asp:ListItem>Male</asp:ListItem>
<asp:ListItem>Female</asp:ListItem>
</asp:RadioButtonList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="gender" ErrorMessage="Please Choose your Gender" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="E-mail ID"></asp:Label>
:
<asp:TextBox ID="TextBox3" runat="server" OnTextChanged="TextBox3_TextChanged"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="TextBox3" Display="Dynamic" ErrorMessage="E-mail address is required">*</asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox3" Display="Dynamic" ErrorMessage="E-mail addresses must be in the format of name@domain.xyz" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" ForeColor="Red">Invalid Format</asp:RegularExpressionValidator>
<br />
<br />
<asp:Label ID="Label4" runat="server" Text="password"></asp:Label>
:
<asp:TextBox ID="TextBox4" runat="server" TextMode="Password"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="TextBox4" Display="Dynamic" ErrorMessage="Password is Required!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label5" runat="server" Text="Confirm Password"></asp:Label>
:
<asp:TextBox ID="TextBox5" runat="server" TextMode="Password"></asp:TextBox>
<asp:CompareValidator ID="CompareValidator1" runat="server" ControlToValidate="TextBox5" ErrorMessage="The passwords Didn't Match!" ForeColor="Red" ControlToCompare="TextBox4" Display="Dynamic"></asp:CompareValidator>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
<br />
<asp:GridView ID="GridView1" runat="server" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True">
<Columns>
<asp:BoundField DataField="Name" />
<asp:BoundField DataField="FatherName" />
<asp:BoundField DataField="Email" />
</Columns>
</asp:GridView>
<br />
<br />
<br />
</div>
</form>
</body>
</html>
后面的cs文件代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace WebApplication5
{
public partial class WebForm1 : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\admin\documents\visual studio 2013\Projects\WebApplication5\WebApplication5\App_Data\Candidates.mdf;Integrated Security=True");
public static int count = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
gvbind();
//DataTable dt = new DataTable();
//dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Name"), new DataColumn("FatherName"), new DataColumn("E-mail") });
//ViewState["Candidates"] = dt;
//GridView1.DataSource = (DataTable)ViewState["Candidates"];
//GridView1.DataBind();
}
}
protected void gvbind()
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from Candidates", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
protected void TextBox3_TextChanged(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
count += 1;
int rowIndex = 0;
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into Candidates values('"+TextBox1.Text+"','"+TextBox2.Text+"','"+TextBox3.Text+"')";
cmd.ExecuteNonQuery();
con.Close();
//if (count > 1)
//{
// DataTable dtCurrentTable = (DataTable)ViewState["Candidates"];
// DataRow drCurrentRow = null;
// if (dtCurrentTable.Rows.Count > 0) {
// //for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
// //{
// drCurrentRow = dtCurrentTable.NewRow();
// int totalrows = dtCurrentTable.Rows.Count;
// dtCurrentTable.Rows.Add(drCurrentRow);
// dtCurrentTable.Rows[totalrows]["Name"] = TextBox1.Text;
// dtCurrentTable.Rows[totalrows]["FatherName"] = TextBox2.Text;
// dtCurrentTable.Rows[totalrows]["E-mail"] = TextBox3.Text;
// rowIndex++;
// //}
// ViewState["Candidates"] = dtCurrentTable;
// GridView1.DataSource = dtCurrentTable;
// GridView1.DataBind();
// TextBox1.Text = string.Empty;
// TextBox2.Text = string.Empty;
// TextBox3.Text = string.Empty;
// }
//}
//else
//{
// DataTable dt = (DataTable)ViewState["Candidates"];
// dt.Rows.Add(TextBox1.Text.Trim(), TextBox2.Text.Trim(), TextBox3.Text.Trim());
// ViewState["Candidates"] = dt;
// TextBox1.Text = string.Empty;
// TextBox2.Text = string.Empty;
// TextBox3.Text = string.Empty;
// BindGrid();
//}
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
//protected void BindGrid()
//{
// //GridView1.DataSource = (DataTable)ViewState["Candidates"];
// //GridView1.DataBind();
//}
}
}
只需忽略那些注释代码，当我在方法 gvbind() 中调试第 Gridview1.DataBind(); 行的代码时会出现我提到的错误。
<asp:BoundField DataField="Cname" />
<asp:BoundField DataField="Cfname" />
<asp:BoundField DataField="Cmail" />
这会起作用
我想从 sql 服务器数据库中获取数据并将其显示到我在我的 aspx 网络表单页面上创建的 gridview 中，但它并没有获取它而是抛出了一个错误 **A在所选数据源上找不到名称为 'Name' 的字段或 属性。 ** 我的数据库中已经有一个数据行，列名下有值，我已经在我的代码中创建了 gridview 列，但这似乎 work.Please 没有帮助我完成这个 problem.Below 是我的完整代码：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication5.WebForm1" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
Welcome To My First Web Form<br />
<h1> Candidate Registration Form</h1>
<br />
<br />
Applicant's Name:
<asp:TextBox ID="TextBox1" runat="server" CausesValidation="True" EnableViewState="False" ValidateRequestMode="Enabled"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox1" ErrorMessage="Please enter Your Name!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label1" runat="server" Text="Applicant's FName"></asp:Label>
:
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="TextBox2" ErrorMessage="Please enter your Father name!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label3" runat="server" Text="Gender"></asp:Label>: <asp:RadioButtonList ID="gender" RepeatDirection="Horizontal" runat="server" Width="141px" RepeatLayout="Flow"> <asp:ListItem>Male</asp:ListItem>
<asp:ListItem>Female</asp:ListItem>
</asp:RadioButtonList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server" ControlToValidate="gender" ErrorMessage="Please Choose your Gender" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label2" runat="server" Text="E-mail ID"></asp:Label>
:
<asp:TextBox ID="TextBox3" runat="server" OnTextChanged="TextBox3_TextChanged"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ControlToValidate="TextBox3" Display="Dynamic" ErrorMessage="E-mail address is required">*</asp:RequiredFieldValidator>
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="TextBox3" Display="Dynamic" ErrorMessage="E-mail addresses must be in the format of name@domain.xyz" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" ForeColor="Red">Invalid Format</asp:RegularExpressionValidator>
<br />
<br />
<asp:Label ID="Label4" runat="server" Text="password"></asp:Label>
:
<asp:TextBox ID="TextBox4" runat="server" TextMode="Password"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator6" runat="server" ControlToValidate="TextBox4" Display="Dynamic" ErrorMessage="Password is Required!" ForeColor="Red"></asp:RequiredFieldValidator>
<br />
<br />
<asp:Label ID="Label5" runat="server" Text="Confirm Password"></asp:Label>
:
<asp:TextBox ID="TextBox5" runat="server" TextMode="Password"></asp:TextBox>
<asp:CompareValidator ID="CompareValidator1" runat="server" ControlToValidate="TextBox5" ErrorMessage="The passwords Didn't Match!" ForeColor="Red" ControlToCompare="TextBox4" Display="Dynamic"></asp:CompareValidator>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
<br />
<asp:GridView ID="GridView1" runat="server" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" AutoGenerateDeleteButton="True" AutoGenerateEditButton="True">
<Columns>
<asp:BoundField DataField="Name" />
<asp:BoundField DataField="FatherName" />
<asp:BoundField DataField="Email" />
</Columns>
</asp:GridView>
<br />
<br />
<br />
</div>
</form>
</body>
</html>
后面的cs文件代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
namespace WebApplication5
{
public partial class WebForm1 : System.Web.UI.Page
{
SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\admin\documents\visual studio 2013\Projects\WebApplication5\WebApplication5\App_Data\Candidates.mdf;Integrated Security=True");
public static int count = 0;
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
gvbind();
//DataTable dt = new DataTable();
//dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Name"), new DataColumn("FatherName"), new DataColumn("E-mail") });
//ViewState["Candidates"] = dt;
//GridView1.DataSource = (DataTable)ViewState["Candidates"];
//GridView1.DataBind();
}
}
protected void gvbind()
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from Candidates", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
protected void TextBox3_TextChanged(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
count += 1;
int rowIndex = 0;
con.Open();
SqlCommand cmd = con.CreateCommand();
cmd.CommandType = CommandType.Text;
cmd.CommandText = "insert into Candidates values('"+TextBox1.Text+"','"+TextBox2.Text+"','"+TextBox3.Text+"')";
cmd.ExecuteNonQuery();
con.Close();
//if (count > 1)
//{
// DataTable dtCurrentTable = (DataTable)ViewState["Candidates"];
// DataRow drCurrentRow = null;
// if (dtCurrentTable.Rows.Count > 0) {
// //for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
// //{
// drCurrentRow = dtCurrentTable.NewRow();
// int totalrows = dtCurrentTable.Rows.Count;
// dtCurrentTable.Rows.Add(drCurrentRow);
// dtCurrentTable.Rows[totalrows]["Name"] = TextBox1.Text;
// dtCurrentTable.Rows[totalrows]["FatherName"] = TextBox2.Text;
// dtCurrentTable.Rows[totalrows]["E-mail"] = TextBox3.Text;
// rowIndex++;
// //}
// ViewState["Candidates"] = dtCurrentTable;
// GridView1.DataSource = dtCurrentTable;
// GridView1.DataBind();
// TextBox1.Text = string.Empty;
// TextBox2.Text = string.Empty;
// TextBox3.Text = string.Empty;
// }
//}
//else
//{
// DataTable dt = (DataTable)ViewState["Candidates"];
// dt.Rows.Add(TextBox1.Text.Trim(), TextBox2.Text.Trim(), TextBox3.Text.Trim());
// ViewState["Candidates"] = dt;
// TextBox1.Text = string.Empty;
// TextBox2.Text = string.Empty;
// TextBox3.Text = string.Empty;
// BindGrid();
//}
}
protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
//protected void BindGrid()
//{
// //GridView1.DataSource = (DataTable)ViewState["Candidates"];
// //GridView1.DataBind();
//}
}
}
只需忽略那些注释代码，当我在方法 gvbind() 中调试第 Gridview1.DataBind(); 行的代码时会出现我提到的错误。
<asp:BoundField DataField="Cname" />
<asp:BoundField DataField="Cfname" />
<asp:BoundField DataField="Cmail" />
这会起作用