【发布时间】：2016-10-13 07:22:55
【问题描述】：
我想从 sql server 数据库中获取数据并将其显示到我在我的 aspx webform 页面上创建的 gridview 中，但它没有获取它而是抛出一个错误，上面写着 **A field or property with the name在所选数据源上找不到“名称”。 ** 我的数据库中已经有一个数据行，列名下的值，我在代码中创建了 gridview 列，但这似乎不起作用。请帮我解决这个问题。下面是我的整个代码：
<%@ 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>下面是cs文件后面的代码：
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();
//}
}
}忽略那些注释代码，当我在方法 gvbind() 中调试行 Gridview1.DataBind(); 上的代码时，我提到的错误就出现了。
【问题讨论】：
-
寻求调试帮助的问题（“为什么这段代码不起作用？”）必须包括所需的行为、特定的问题或错误以及在问题本身中重现它所需的最短代码。没有明确问题陈述的问题对其他读者没有用处。请参阅：如何创建最小、完整和可验证的示例。
-
表 Candidates 有哪些列？
-
调试你的代码，然后在 da.Fill(ds);注意数据集中的内容 ds。它是否填充正确。如果是则检查数据集中的列并在网格视图的数据字段中设置相同的名称
-
@Andrei 它有三列：Cname,Cfname,Cmail
-
@KamalSingh 您的网格视图数据字段必须是 Cname、Cfname 和 Cmail
标签： c# asp.net gridview webforms mdf