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[英]How to Establish database(sql) Connection to receive the data from textfields using c#?
[英]How to establish database(SQL) Connection using c#?
我想建立一個數據庫連接,以使用C#接收客戶的詳細信息。 我正在使用sql-server 2008和visual studio 2010 .....
這是這段代碼:
<asp:Textbox id="TxtBox1" runat="server" />
<asp:Textbox id="TxtBox2" runat="server" />
<asp:Button id="Button1" runat="server" Onclick="Button1_Click" />
和背后的代碼:
protected void Button1_Click(Object sender,EventArgs e)
{
string Text1=TextBox1.Text;
string Text2=TextBox2.Text;
string connectionString="Data Source=servername;InitialCatalog=DataBaseNameUserID=sa; Password=YourPassword;"
SqlConnection sqlConnection=new SqlConnection(connectionString);
string insertStatement="INSERT INTO TableName(column1,column2) VALUES Txtb1+","+Txtb2";
SqlCommand sqlCommand=new SqlCommand(insertStatement,sqlConnection);
try
{
sqlConnection.Open();
sqlCommand.ExecuteNonQuery();
}
finally
{
sqlConnection.Close();
}
}
我已經在其中創建了data.mdf文件,已經創建了包含字段的表,但是我無法獲得連接未建立的錯誤,有人可以幫助我解決我的問題嗎???
該連接字符串錯誤。
string connectionString="Data Source=servername;InitialCatalog=DataBaseNameUserID=sa;" +
"Password=YourPassword;"
應該
string connectionString="Data Source=servername;InitialCatalog=DataBaseName; UserID=sa;" +
"Password=YourPassword;"
但是,切勿在應用程序中使用sa用戶。 使用Management Studio創建新用戶或更好地使用Integrated Security。
另外,您的其余代碼也應以這種方式編寫
using(SqlConnection sqlConnection=new SqlConnection(connectionString))
{
string insertStatement="INSERT INTO TableName(column1,column2) VALUES (@col1, @col2)";
SqlCommand sqlCommand=new SqlCommand(insertStatement,sqlConnection);
sqlCommand.Parameters.AddWithValue("@col1", Text1);
sqlCommand.Parameters.AddWithValue("@col2", Text2);
sqlConnection.Open();
sqlCommand.ExecuteNonQuery();
}
此代碼無法編譯。 您需要在此行添加分號:
string connectionString="Data Source=servername;InitialCatalog=DataBaseNameUserID=sa; Password=YourPassword;"
像這樣:
string connectionString="Data Source=servername;InitialCatalog=DataBaseNameUserID=sa; Password=YourPassword;";
您還需要更改此行:
string insertStatement="INSERT INTO TableName(column1,column2) VALUES Txtb1+","+Txtb2";
對此:
string insertStatement = "INSERT INTO TableName(column1,column2) VALUES " + Text1 + ", " + Text2;
使用連接字符串,如下所示:
connectionString="Data Source=ServerAddress;Initial Catalog=DataBaseName;Integrated Security=SSPI;User ID=Domain\Username;Password=Password;"
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