小编C S*_*per的帖子

我第一次用 vb.net 编码，想从数据集中读取值。

为此，我编码如下，但不起作用：

 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        '------------------------------Load Name------------------'

        Try
            Dim strcon As String = ConfigurationManager.ConnectionStrings("ConnStringDb").ConnectionString
            Dim i As Integer
            Dim con As New SqlConnection(strcon)

            da = New SqlDataAdapter("select empName from empMaster_VB", con)
            ds = New DataSet()
            da.Fill(ds)
            For(i=0;i<ds.



        Catch ex As Exception

        End Try
  End Sub

当我们从 C# 中的数据集获取值时，我尝试使用 VB（从 for 循环）作为，

for(int i=0;i<ds.Tables[0].Rows.Count;i++)
{

  int someVar=int.parse(ds.Tables[0].Rows[i][0].toString());

}

但它不能像我上面编码的那样在 vb.net 中工作，

请帮我。

我写了一个存储过程: -

CREATE PROCEDURE GET_USERSTORYDATA_EXISTS
    @MyWizardUserStoryId INT
   ,@ProjectId INT
   ,@StoryTitle NVARCHAR(MAX)
AS
BEGIN
    SET NOCOUNT ON;
    IF EXISTS (SELECT 1 FROM USERSTORY WHERE [MyWizardUserStoryId]=@MyWizardUserStoryId AND ProjectId=@ProjectId)
    BEGIN
        IF EXISTS (SELECT 1 FROM USERSTORY WHERE [MyWizardUserStoryId]=@MyWizardUserStoryId AND ProjectId=@ProjectId AND Title=@StoryTitle)
        BEGIN
            SELECT 0;
        END
        ELSE
         BEGIN
            SELECT 1;
        END
    END
    ELSE
         BEGIN
            SELECT 1;
        END

END
GO

我通过Entity框架使用了这个程序: -

List<Int32>lst=context.GET_USERSTORYDATA_EXISTS(MyWizardUserStoryId,ProjectId,storyTitle);

但它给我的错误: -

Can not implicitly convert type 'ObjectResult<int?>' to List<int>

我有以下类结构:

class Child
{
    public List<ParentData> ParentData { get; set; }
}

class ParentData
{
    public string FatherName {get;set;}
    public string MotherName {get;set;}
    public List<GrandParentData> GrandParentData{ get; set; }
}

class GrandParentData
{
    public string GrandFatherName {get;set;}
    public string GrandMotherName {get;set;}
}

当我想填补这个:

foreach (var item in res)
{
    obj.StoryData.Add(
        new StoryData
        {
            FatherName = item.FatherName,
            MotherName = item.Description,                                                                        
            GrandParentData = new List<GrandParentData().Add(
                new GrandParentData 
                { 
                    GrandFatherName = "",
                    GrandMotherName = ""
                }
            );
        }                            
    );
}

当我尝试将数据添加到GrandParentList列表时,这给了我错误:

无法将类型void隐式转换为List

我需要改变我的班级结构吗？我应该对代码进行哪些编辑？

我有桌子:

Bonus     Value

500       1400

1500       177

1800       453

1200       100

800       2500

200         50

780        740

我想打印列的总和,以最大值为准.

我试过以下:

select 
case when sum(bonus)>sum(Value) then sum(bonus) end
case when sum(Value)>sum(bonus) then sum(Value) end
from emp

但我没有得到结果.

错误:

Msg 156, Level 15, State 1, Line 3
Incorrect syntax near the keyword 'case'.

我试图在数据库中插入一个问题,表中的字段为nvarchar(max)(sql server 2008 r2)

代码如下:

Protected Sub btnSave_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSave.Click
    gc.ExecuteCommand("insert into QuestionMaster values('" & txtQuestion.Text & "','" & ViewState("ClientID") & "','" & ViewState("KioskID") & "')")
    Response.Write("<script type='text/javascript' language='javascript'>alert('Question Added Sucessfully!!!')</script>")
    BindGrid()
End Sub

当我插入任何字符串时:

what's your name? 

然后它给了我错误:

's'附近的语法不正确.字符串')'后面的未闭合引号.

如果我只是提供字符串:

What is your name?

然后它不会给我错误.

请帮我.

我直接将android连接到SQLServer(我知道它不推荐)

我写了以下代码:

public class MainActivity extends Activity {


     String dbName = "AndroidDB";
     String serverip="10.0.2.2";
     String serverport="1433";
     //String url = "jdbc:sqlserver://14GRAFICALI\\MSSQLSERVER2008;databaseName="+dbName+"";
     //String url ="jdbc:sqlserver://14GRAFICALI\\MSSQLSERVER2008;databaseName=AndroidDB;integratedSecurity=true";
     String url ="jdbc:sqlserver://14GRAFICALI;instanceName=\\MSSQLSERVER2008;DatabaseName=AndroidDB;integratedSecurity=true";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        TextView tvData=(TextView)findViewById(R.id.tvSelectedData);

        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver").newInstance();
            Class.forName("javax.sql.XAConnection").newInstance();
            Connection conn =DriverManager.getConnection(url);                   

            Statement statement=conn.createStatement();
            ResultSet resultSet=statement.executeQuery("select * from UserMaster");
            while(resultSet.next()){
                tvData.setText(" Data1 : "+resultSet.getString(1)+"  Data 2 : "+resultSet.getNString(2));
            }

        } catch (Exception e) {
            e.printStackTrace();
            tvData.setText(e.getMessage());
        }



    }

在此之前,我没有这条线:

 Class.forName("javax.sql.XAConnection").newInstance();

但它给了我一个例外:

09-07 15:12:20.911: E/dalvikvm(1293): Could not find class 'javax.sql.XAConnection', …

我在android中使用jdbc(Aware not recomended)

我有以下代码:

 public int CheckUser(String uName,String password)
        {

             try {

                    String sql="select uid from UserMaster where username='"+uName+"' and password='"+password+"'";
                    statement = conn.createStatement();
                    resultSet = statement.executeQuery(sql);
                    int value=0;
                    if (resultSet.next()) {
                         value=resultSet.getInt(1);
                        }


                    return value;

                }
                catch (Exception e) 
                {
                    e.printStackTrace();
                    return 0;
                }
}

我得到空指针异常 statement = conn.createStatement();

logcat的:

09-12 11:04:14.543: W/KeyCharacterMap(483): No keyboard for id 0
09-12 11:04:14.553: W/KeyCharacterMap(483): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
09-12 11:04:51.173: W/System.err(483): java.lang.NullPointerException
09-12 11:04:51.194: W/System.err(483):  at com.example.messagesql.gaSQLConnect.CheckUser(gaSQLConnect.java:69)
09-12 11:04:51.213: W/System.err(483):  at com.example.messagesql.Login$UserLogin.doInBackground(Login.java:109) …

我有一个字符串列表.

我想在其中删除一个如下:

  settings.RecentSearches.Keys.Remove(itemToAdd.Key);
  settings.RecentSearches.Keys.Add(itemToAdd.Key);

错误:

Mutating a key collection derived from a dictionary is not allowed.

我想在其中添加和删除值.

我能做什么？

我想获得点击按钮的ID,因为我的表单上有4-5个按钮.

    <button type="submit" style="height: 30px" id="btnHelp" name="btnHelp" onclick="ShowHelp(2);return false;">Help</button>

    <button type="button" style="height: 30px" id="btnClose" name="btnClose" onclick="Close();return false;">Close</button>

    <button type="button" style="height: 30px" id="btnSave" name="btnSave" onclick="Save();return false;">Close</button>

...............................

无论哪个按钮点击,我只想获得该按钮的ID.

$(function () {

        var id = $(this).attr('id');

        alert(id);
})

还有

$("input").click(function (event) {
        var urlid = $(this).attr('id')
        alert(urlid);
    })

但我得到的警报是未定义的.

如何点击按钮的ID？

请帮我.

我有字符串:

string sku= "plmca60     5";

我只想用逗号替换第一个空格.因此我试过:

sku.replace(" ",",");

但它给了我:

sku="plmca60,,,,,5";

因为字符串中有五个空格.但是我想要替换第一次出现的空白区域;

sku="plmca60,    5"

我怎么能这样做？

我有下面的示例 javascript 数组对象 -

[ {id:"B1",name:"Belacost",group:"Quim"},
  {id:"B1",name:"Medtown",group:"Bik"},
  {id:"B1",name:"Regkim",group:"Dum"},
  {id:"C1",name:"CSet",group:"Core"},
  {id:"D1",name:"Merigo",group:"Dian"},
  {id:"D1",name:"Chilland",group:"Ground"},
  {id:"N1",name:"Fiwkow",group:"Vig"},
]

在这个数组中，如果重复，我想将 id 设为空。

Eg. [ {id:"B1",name:"Belacost",group:"Quim"}, //id is here since this is first time
      {id:"",name:"Medtown",group:"Bik"}, //id is blank since we already have B1
      {id:"",name:"Regkim",group:"Dum"},
      {id:"C1",name:"CSet",group:"Core"},
      {id:"D1",name:"Merigo",group:"Dian"}, // id is here since D1 is first time
      {id:"",name:"Chilland",group:"Ground"}, //id is empty since we already have id D1
      {id:"N1",name:"Fiwkow",group:"Vig"},
    ]

我尝试通过 map 实现它，但找不到重复 id。