本篇文章给大家谈谈asp.net-mvc–SQLAzure得到一个错误’已经有一个打开的DataReader与此命令..’关联,即使设置’MultipleActiveResultSets=True’，

本篇文章给大家谈谈asp.net-mvc – SQL Azure得到一个错误’已经有一个打开的DataReader与此命令..’关联,即使设置’MultipleActiveResultSets = True’，同时本文还将给你拓展158. Read N Characters Given Read4 II - Call multiple times、Android startActivityForResult,setResult,onActivityResult未调用、ASP.net MVC中的Azure Redis StackExchange.Redis ConnectionMultiplexer、asp.net-core – Stream的意外结束,内容可能已被另一个组件读取. Microsoft.AspNetCore.WebUtilities.MultipartReaderStream等相关知识，希望对各位有所帮助，不要忘了收藏本站喔。

• asp.net-mvc – SQL Azure得到一个错误’已经有一个打开的DataReader与此命令..’关联,即使设置’MultipleActiveResultSets = True’
• 158. Read N Characters Given Read4 II - Call multiple times
• Android startActivityForResult,setResult,onActivityResult未调用
• ASP.net MVC中的Azure Redis StackExchange.Redis ConnectionMultiplexer
• asp.net-core – Stream的意外结束,内容可能已被另一个组件读取. Microsoft.AspNetCore.WebUtilities.MultipartReaderStream

asp.net-mvc – SQL Azure得到一个错误’已经有一个打开的DataReader与此命令..’关联,即使设置’MultipleActiveResultSets = True’

<connectionStrings>
        <add name="#DBInstanceName#" connectionString="Data Source=tcp:#server#.database.windows.net,1433;Initial Catalog=#dbname#;User ID=”UserName#@#server#;Password=”#password#”;MultipleActiveResultSets=True" providerName="System.Data.sqlClient"/>
    </connectionStrings>

158. Read N Characters Given Read4 II - Call multiple times

158. Read N Characters Given Read4 II - Call multiple times

题目链接：https://leetcode.com/problems...

和那道read n不同的是这次call multiple times，问题就是当前的call可能存在多读了几个字节，那么下一次call read的时候要先算上上次多读的部分，所以要保存上次读的。和读一次一样有两种要考虑的case：

1. file读完了： read4(buf[]) == 0

2. file没读完，但是buf装满了read4(buf[]) > n - res

public class Solution extends Reader4 {
    /**
     * @param buf Destination buffer
     * @param n   Maximum number of characters to read
     * @return    The number of characters read
     */
    char[] buff = new char[4];
    int start = 0;
    int num = 0;
    public int read(char[] buf, int n) {
        int res = 0;
        while(res < n) {
            // no previous buff remain
            if(start == 0) num = read4(buff);
            // finish reading
            if(num == 0) break;
            // count the remain char to use for next call: start is the next start
            while(res < n && start < num) buf[res++] = buff[start++];
            // clear start if read all: n - res >= num - start
            if(start == num) start = 0;
        }
        return res;
    }
}

157. Read N Characters Given Read4

    public int read(char[] buf, int n) {
        int res = 0;
        char[] temp = new char[4];
        while(res < n) {
            int cur = read4(temp);
            if(cur == 0) break;
            
            int num = Math.min(cur, n - res);
            for(int j = 0; j < num; j++) buf[res++] = temp[j];
        }
        return res;
    }

Android startActivityForResult,setResult,onActivityResult未调用

我打了一个电话,要求提供结果：

    Intent intentcall = new Intent();
intentcall.setAction(Intent.ACTION_CALL);
intentcall.setData(Uri.parse("tel:" + phoneNumber));
this.startActivityForResult(intentcall, REQUEST_SLIPDROP_ICON_OFF);

然后像这样在电话监听器中设置结果：

    private class MyPhonestateListener extends PhonestateListener{
     public void onCallStateChanged(int state, String incomingNumber) {

         super.onCallStateChanged(state, incomingNumber);

         switch (state) {
             case TelephonyManager.CALL_STATE_IDLE:
                                   setResult(Activity.RESULT_OK);
                                   break;

最后,我想关闭onActivityResult中的图标,但是什么也没有发生.

    switch (requestCode) {

    case REQUEST_SLIPDROP_ICON_OFF:
        Log.d("request icon off", "request icon off");

        if (resultCode == Activity.RESULT_OK) {     

            changeMenuItem(R.id.fall, R.drawable.fall);
            slipAndDropIconOn = false;

        } 

        break;

哪里不对了？请指教！谢谢

解决方法:

我认为此操作不会返回结果,因此调用startActivityForResult与调用startActivity没什么不同

注意：输出=无.
http://developer.android.com/reference/android/content/Intent.html#ACTION_CALL

ASP.net MVC中的Azure Redis StackExchange.Redis ConnectionMultiplexer

private static ConnectionMultiplexer Connection { get { return LazyConnection.Value; } }

    private static readonly Lazy<ConnectionMultiplexer> LazyConnection =
        new Lazy<ConnectionMultiplexer>(
            () =>
            {
                return
                    ConnectionMultiplexer.Connect(connStinrg);
            });

asp.net-core – Stream的意外结束,内容可能已被另一个组件读取. Microsoft.AspNetCore.WebUtilities.MultipartReaderStream

if (MultipartRequestHelper.IsMultipartContentType(Request.ContentType))
            {
                // Used to accumulate all the form url encoded key value pairs in the 
                // request.
                var formAccumulator = new keyvalueAccumulator();

                var boundary = Request.GetMultipartBoundary();
                var reader = new MultipartReader(boundary,HttpContext.Request.Body);
                var section = await reader.ReadNextSectionAsync();
                while (section != null)
                {
                    ContentdispositionHeaderValue contentdisposition;
                    var hasContentdispositionHeader =
                        ContentdispositionHeaderValue.TryParse(section.Contentdisposition,out contentdisposition);
                }
            }

[HttpPost]
    [Route("")]
    [disableFormValueModelBinding]
    public async Task<IActionResult> Post()

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
public class disableFormValueModelBindingAttribute : Attribute,IResourceFilter
{
    public void OnResourceExecuting(ResourceExecutingContext context)
    {
        var factories = context.ValueProviderFactories;
        factories.RemoveType<FormValueProviderFactory>();
        factories.RemoveType<JQueryFormValueProviderFactory>();
    }

    public void OnResourceExecuted(ResourceExecutedContext context)
    {
    }
}

关于asp.net-mvc – SQL Azure得到一个错误’已经有一个打开的DataReader与此命令..’关联,即使设置’MultipleActiveResultSets = True’的介绍现已完结，谢谢您的耐心阅读，如果想了解更多关于158. Read N Characters Given Read4 II - Call multiple times、Android startActivityForResult,setResult,onActivityResult未调用、ASP.net MVC中的Azure Redis StackExchange.Redis ConnectionMultiplexer、asp.net-core – Stream的意外结束,内容可能已被另一个组件读取. Microsoft.AspNetCore.WebUtilities.MultipartReaderStream的相关知识，请在本站寻找。