在MVVM Light中需要執行邏輯按下按鈕以生成數據庫

Question

我對MVVM Light for WPF相當陌生。我正在使用VIsual Studio 2013，並使用C＃創建了一個項目。我已經得到了xaml中按鈕的邏輯。當用戶點擊這個按鈕時，我想讓應用程序生成一個數據庫和一個數據表。我已經在xaml中獲得了綁定命令，它將觸發中繼命令。我在模型中也有一個方法來生成數據庫和數據表。我在視圖模型中創建了一箇中繼命令，但除此之外，我不太確定接下來要做什麼。任何幫助，將不勝感激。

視圖 - XAML

<Button Content="New Project" Margin="0,0,3,0" Command="{Binding AddProjectCommand}" IsEnabled="{Binding CommNotStreaming}" Grid.Column="2" Grid.Row="0"/> 

視圖模型 -

public class ProjectConfigViewModel : ViewModelBase 
{ 
    //Binding AddProjectCommand 
    public RelayCommand AddProjectCommand { get; set; } 


    private string consoleText { get; set; } 
    private StringBuilder consoleBuilder = new StringBuilder(360); 

    public ProjectConfigViewModel() 
    { 
     this.AddProjectCommand = new RelayCommand(this.AddProject); 

    } 

    public void AddProject() 
    { 
      //Not really sure what to do here to call the ProjectDbInteraction class 

    } 

}  

型號 - 數據庫交互類

public class ProjectDbInteraction 
{ 
    //String rawDBConnectionString = "Server=localhost; Database=12_rse_002_db; uid=root; pwd=password; Connection Timeout=5;"; //TODO Either pick a standard for make this edittable 

    public void CreateProjectDb(string projName) 
    { 
     try 
     { 
      MySqlConnection connection = new MySqlConnection("DataSource=localhost;UserId=root;pwd=password"); 
      MySqlCommand command = new MySqlCommand("CREATE DATABASE " + projName + ";", connection); 
      connection.Open(); 
      command.CommandText = "DROP DATABASE IF EXISTS " + projName; 
      command.ExecuteNonQuery(); 
      command.CommandText = "CREATE TABLE Projects(ProjectID INT NOT NULL, ProjectName VARCHAR(VARCHAR(255), ProjectStartDate DateTime, ProjectEndDate DateTime, ProjectNotes VARCHAR(MAX) PRIMARY KEY (ProjectID))"; 
      command.ExecuteNonQuery(); 
      //command.CommandText = "CREATE TABLE Metabolites(MetaboliteID VARCHAR(10) NOT NULL, Metabolite_Name VARCHAR(45) NULL, ReactionTime INT NULL, PRIMARY KEY (MetaboliteID)"; 
      connection.Close(); 
     } 
     catch (Exception) 
     { 

     } 
    } 


    public event PropertyChangedEventHandler PropertyChanged; 
    private void NotifyPropertyChanged(String propertyName) 
    { 
     if (PropertyChanged != null) 
     { 
      PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); 
     } 
    } 
} 

Answer 1

開始通過更換

this.AddProjectCommand = new RelayCommand(this.AddProject); 

與

this.AddProjectCommand=new RelayCommand(() => AddProject()); 

。

然後在你的AddProject（）方法，調用數據庫的創建，是這樣的：

ProjectDbInteraction.CreateProjectDb("some name");