Question

我正在使用SQL Server Compact 4.0并在Windows Home Server 2011上托管该站点，程序是用C＃编写的 - Visual Web Developer。

我已经尝试了所有可能的连接字符串变体，但我仍然会遇到此错误：

初始化字符串的格式不符合从索引0开始的规范。

这是我目前的字符串

<add name="Inventory" 
     connectionString="Data Source=C:\Program Files\Windows Server\Bin\WebApps\Site\App_Data\PHSInventory.sdf;"  /  >

我也尝试用|data directory|指出它。我在Google上用完了蓝色链接点击。

STACK TRACE

[ArgumentException：初始化字符串的格式不符合从索引0开始的规范。]      System.Data.SqlServerCe.ConStringUtil.GetKeyValuePair（Char [] connectionString，Int32 currentPosition，String＆amp; key，Char [] valuebuf，Int32＆amp; vallength，Boolean＆amp; isempty）+1182      System.Data.SqlServerCe.ConStringUtil.ParseStringIntoHashtable（String conString，Hashtable values）+188      System.Data.SqlServerCe.ConStringUtil.ParseConnectionString（String＆amp; connectionString）+128      System.Data.SqlServerCe.SqlCeConnection.set_ConnectionString（String value）+679      System.Data.SqlServerCe.SqlCeConnection..ctor（String connectionString）+46      System.Data.SqlServerCe.SqlCeDataAdapter..ctor（String selectCommandText，String selectConnectionString）+73      DataAccess.FillDataTable（String SQL）+149      Default.Page_Load（Object sender，EventArgs e）+378      System.Web.Util.CalliEventHandlerDelegateProxy.Callback（Object sender，EventArgs e）+51      System.Web.UI.Control.OnLoad（EventArgs e）+92      System.Web.UI.Control.LoadRecursive（）+54      System.Web.UI.Page.ProcessRequestMain（Boolean includeStagesBeforeAsyncPoint，Boolean includeStagesAfterAsyncPoint）+772

数据访问

using System;

using System.Data;

using System.Data.SqlClient;

using System.Web.Configuration;

using System.Data.SqlServerCe;

public class DataAccess
{

    private int count = -1;

    public int Count
    { get { return count; } }

    private string connectionString;
    public string ConnectionName
    {
        set
        {
            if (WebConfigurationManager.ConnectionStrings[value] == null)
            {
                throw new Exception("Cannot find connection string named '" +
                   value + "' in web.config");
            }
            //Retrieve connection string from web.config.
            connectionString =
               WebConfigurationManager.ConnectionStrings[value].ConnectionString;
        }
    }

    public DataAccess(string connectionName)
    {
        ConnectionName = connectionName;
    }

    public DataTable FillDataTable(string SQL)
    {
        // Fill dataTable.
         WriteToTraceLogForDebugging(SQL);
        SqlCeConnection sqlConn = new SqlCeConnection("Data Source=D:\\InventoryData\\PHSInventory.sdf;");
        SqlCeDataAdapter objAdapter = new SqlCeDataAdapter(SQL, sqlConn);
        DataTable dt = new DataTable();
        objAdapter.Fill(dt);
        count = dt.Rows.Count;  
        return dt;
    }
    public int ExecuteNonQuery(string SQL)
    {
        WriteToTraceLogForDebugging(SQL);
        SqlCeConnection sqlConn = new SqlCeConnection(connectionString);
        sqlConn.Open();
        SqlCeCommand objCmd = new SqlCeCommand(SQL, sqlConn);
        count = objCmd.ExecuteNonQuery();
        return count;
    }

    public object ExecuteScalar(String SQL)
    {
        WriteToTraceLogForDebugging(SQL);
        SqlCeConnection sqlConn = new SqlCeConnection(connectionString);
        sqlConn.Open();
        SqlCeCommand objCmd = new SqlCeCommand(SQL, sqlConn);
        //calling code needs to cast data (to integer, string, double, etc.) upon receipt. 
        return objCmd.ExecuteScalar();
    }

    private void WriteToTraceLogForDebugging(string sql)
    {
        System.Web.HttpContext.Current.Trace.Write("sql****", sql);
        System.Web.HttpContext.Current.Trace.Write("CONNECTION*****", connectionString);
    }

}

Answer 1

您正在使用System.Data.SqlConnection类，对于SQL Server Compact，您必须使用System.Data.SqlServerCe类，如SqlCeConnection。

然后你构建的SqlCeDataAdapter错误，你应该使用：

 SqlCeDataAdapter objAdapter = new SqlCeDataAdapter(SQL, sqlConn);

或

 SqlCeDataAdapter objAdapter = new SqlCeDataAdapter(SQL, connectionString);

Answer 2

您的封闭引号已关闭：

Data Source="C:\Program Files\Windows Server\Bin\WebApps\Site\App_Data\PHSInventory.sdf;"

应该是：

"Data Source=C:\Program Files\Windows Server\Bin\WebApps\Site\App_Data\PHSInventory.sdf;"

请注意，您的初始字符串会尝试在实际连接字符串之前将Data Source作为文字放置：

connectionString=Data Source="

连接字符串的部分应该在哪里。

SQL Server Compact的连接字符串 - Windows主服务器

2 个答案: