我的经验和我正在使用的东西
所以我刚开始使用 ASP.NET 中的一个非常基本的 Web 应用程序，以便更熟悉 SQL Server Management Studios 和 Visual Studios 2010。通常，我使用 MySQL、PHP 和 Sublime Text Editor 2。我是对 C# 和在 Visual Studios 中实现数据库不是很有经验。所以我正在尝试使用 SQL Server Management Studios 中的存储过程并在 Visual Studios 2010 中实现它。
问题
所以这是我的问题：我正在尝试创建一个链接到 SQL Server 的基本网页，并能够添加、删除、搜索和显示数据库中的所有记录。现在我已经根据我认为正确的添加/删除代码编写了自己的代码，当我单击按钮时没有任何反应。所以我相信你可以看到我的挫败感来自哪里。我不确定问题出在我的 C# 编码还是我的 SQL 编码中。
我想专注于让我的添加/删除按钮工作，然后找出显示所有文件的逻辑。我希望能够单击一个按钮，然后让它显示所有文件，而不仅仅是显示一个网格。我的数据库称为 FirstApp。
这是我的 web.config 文件中的内容：
<add name="FirstApp" connectionString="Data Source=PCNAME\SQLEXPRESS;Initial Catalog=FirstApp;Integrated Security=True"
providerName="System.Data.SqlClient" />
现在这是我的 Default.aspx.cs 文件中的内容：
*现在正确的代码！*
namespace FirstApp
{
public partial class _Default : System.Web.UI.Page
{
public string CommandArgument { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
}
private void MessageBox(string msg)
{
Label lbl = new Label();
lbl.Text = "<script language='javascript'>" + Environment.NewLine + "window.alert('" + msg + "')</script>";
Page.Controls.Add(lbl);
}
//Add a new company to the database
protected void add_Click(object sender, EventArgs e)
{
SqlDataReader rdr = null;
string connectionString = null;
SqlConnection cnn;
connectionString = "Data Source=ITXDK29M91\\SQLEXPRESS;Initial Catalog=FirstApp;Integrated Security=True";
cnn = new SqlConnection(connectionString);
try
{
cnn.Open();
SqlCommand cmd = new SqlCommand("dbo.Add_Company", cnn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@companyname", companyname.Text);
cmd.Parameters.AddWithValue("@companyphone", companyphone.Text);
cmd.Parameters.AddWithValue("@companyid", companyid.Text);
cmd.Parameters.AddWithValue("@companytype", companytype.Text);
rdr = cmd.ExecuteReader();
}
finally
{
//Close the connections
if (cnn != null)
{
cnn.Close();
}
if (rdr != null)
{
rdr.Close();
}
}
}
//Delete a company from the database
protected void delete_Click(object sender, EventArgs e)
{
SqlDataReader rdr = null;
SqlConnection cnn;
string connectionString = null;
connectionString = "Data Source=ITXDK29M91\\SQLEXPRESS;Initial Catalog=FirstApp;Integrated Security=True";
cnn = new SqlConnection(connectionString);
try
{
cnn.Open();
SqlCommand cmd = new SqlCommand("dbo.deleteCo", cnn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@ID", SqlDbType.Int);
rdr = cmd.ExecuteReader();
}
finally
{
//Close the connections
if (cnn != null)
{
cnn.Close();
}
if (rdr != null)
{
rdr.Close();
}
}
}
protected void Search_Click(object sender, EventArgs e)
{
}
protected void Getall_Click(object sender, EventArgs e)
{
}
}
}
这是我在 Default.aspx 的源代码中的内容
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> <h2>Ready for an Adventure? Let's get started!
</h2> <hr />This is where you can enter information about your company.
<br />
<form method="post" action="">
Company Name:<br />
<asp:TextBox ID="companyname" runat="server"></asp:TextBox>
<br />
Company Phone Number:<br />
<asp:TextBox ID="companyphone" runat="server"></asp:TextBox>
<br />
Company Tax ID Number:
<br />
<asp:TextBox ID="companyid" runat="server"></asp:TextBox>
<br />
Type of business: <br />
<asp:TextBox ID="companytype" runat="server"></asp:TextBox>
<br />
<asp:Button ID="add" runat="server" BackColor="DeepSkyBlue"
BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
CssClass="submitButton" Font-Names="Palatino Linotype" ForeColor="White"
onclick="add_Click" Text="Submit" Width="128px" />
</form> <hr />
Want to delete your company information?<br />
Enter in the Company ID Number:
<br />
<asp:TextBox ID="PrimaryKey" runat="server" Width="120px"></asp:TextBox>
<br />
<asp:Button ID="delete" runat="server" BackColor="DeepSkyBlue"
BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
CssClass="submitButton" Font-Names="Palatino Linotype" ForeColor="White"
onclick="delete_Click" Text="Delete Info" Width="119px" />
<br />
<hr />
Looking for similar companies?
<br />
(Ex: Retail, Designer, Restaurant, etc.)
<br />
Enter the type of company:
<br />
<asp:TextBox ID="scompanyid" runat="server" Width="120px"></asp:TextBox>
<br />
<asp:Button ID="Search" runat="server" BackColor="DeepSkyBlue"
BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
CssClass="submitButton" Font-Names="Palatino Linotype" ForeColor="White"
onclick="Search_Click" Text="Start Searching!" Width="119px" />
<br />
<hr />
Want to see all the companies that we work with? <br />
Click the button below!
<br />
<asp:Button ID="Getall" runat="server" BackColor="DeepSkyBlue"
BorderColor="Black" BorderStyle="Solid" BorderWidth="1px"
CssClass="submitButton" Font-Names="Palatino Linotype" ForeColor="White"
onclick="Getall_Click" Text="Get all records!" Width="119px" />
<br />
<br />
</asp:Content>
更新：我已经更新了代码以显示正确的代码。添加按钮有效，但我的删除按钮无效。我仍在试图弄清楚这一点。