C# 如何将文本框绑定到类属性_C#_Wpf_Binding

C# 如何将文本框绑定到类属性

c# wpf binding

C# 如何将文本框绑定到类属性,c#,wpf,binding,C#,Wpf,Binding,我想将类中的属性单向绑定到文本框。但是有一个问题，场景在我下面的代码中，将test_string的字符串值放到我的视图中。这个代码我试过了，但似乎不起作用。我需要做什么具有属性的类： namespace config { class tester : INotifyPropertyChanged { public tester() { } private string test_string;

我想将类中的属性单向绑定到文本框。但是有一个问题，场景在我下面的代码中，将test_string的字符串值放到我的视图中。这个代码我试过了，但似乎不起作用。我需要做什么

具有属性的类：

namespace config
{
    class tester : INotifyPropertyChanged
    {
        public tester()
        {
        }

        private string test_string;

        public string Test{
            get { return test_string; }
            private set
            {
                test_string = value;
                RaisePropertyChanged("Test");
            }
        }

        public void dotest(){
            ... do some testing
            Test = "Past point one"
            ... do some more testing
            Test += "Past point two"
            ... do some more testing
            Test += "Finished testing"
        }
    }
}

视图模型

using config
namespace notif
{
    class t_viewmodel
    {
        public t_viewmodel()
        {
        }

        Tester tester = new Tester();

        public string TestLink
        {
            get { return tester.Test; }
        }

        public void run_test()
        {
            tester.dotest();
        }
    }
}

看法

[EDIT1] 由于进程是通过dotest运行的，所以直到完成后才会填充文本框，是否可以在每次设置Test属性时进行此更新

[EDIT2]更改

public void SQLDBAccessTest(string db)
{
    if (test_debug)
        ConnectionTest = "Test started. " + DateTime.Now;

    string conn_string = "";

    try
    {
        conn_string = createConnectionString(db);
        if (test_debug)
            ConnectionTest += "\nConnection string = '" + conn_string + "'";
    }
    catch (Exception ex)
    {
        throw ex;
    }

    try
    {
        if (test_debug)
            ConnectionTest += "\nCreating connection to database...";

        cnn = new SqlConnection(conn_string);

        if (test_debug)
            ConnectionTest += "\nConnection created.";

        if (test_debug)
            ConnectionTest += "\nEstablishing open connection to database...";

        cnn.Open();

        if (test_debug)
            ConnectionTest += "\nEstablished connection to database.";
        if (test_debug)
            ConnectionTest += "\nClosing connection to database...";

        cnn.Close();

        if (test_debug)
            ConnectionTest += "\nConnection closed.";
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nAn error has occured whilst connecting to the database.\n\t - " + ex.Message;

        throw ex;
    }

    if (test_debug)
        ConnectionTest += "\nTest complete. " + DateTime.Now;
}

private string createConnectionString(string db)
{
    string tempConString = ConStr;

    try
    {
        TestConnSettingsFile();
        setDBDataSourceAndSecurity();

        if (test_debug)
            ConnectionTest += "\nCreating connection string...";

        tempConString = tempConString.Replace("<SERVER>", db_datasource);
        tempConString = tempConString.Replace("<DB>", db);
        tempConString = tempConString.Replace("<SECURITY>", db_security);

        if (test_debug)
            ConnectionTest += "\nCreated connection string.";
    }
    catch (Exception ex)
    {
        throw ex;
    }
    return tempConString;
}

private bool TestConnSettingsFile()
{
    bool settingsFileExist = false;
    string filePath = "";

    if (test_debug)
        ConnectionTest += "\nTesting for encrypted connection file...";

    try
    {
        string directory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location);
        filePath = System.IO.Path.Combine(directory, "afx.settings");

        if (System.IO.File.Exists(filePath))
        {
            settingsFileExist = true;
            xmlSettingsFilePath = filePath;

            if (test_debug)
                ConnectionTest += "\nThe encrypted connection file has been found at: " + filePath;
        }
        else
        {
            if (test_debug)
                ConnectionTest += "\nThe encrypted connection file could not be found at: " + filePath;
            throw new Exception("The encrypted connection file could not be found at: " + filePath);
        }
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nError occured while testing if encrypted file exists:\n\t - " + ex.Message;
        throw ex;
    }

    return settingsFileExist;
}

private bool setDBDataSourceAndSecurity()
{
    bool result = false;

    if (test_debug)
        ConnectionTest += "\nRetrieving encrypted connection...";

    try
    {
        if (System.IO.File.Exists(xmlSettingsFilePath))
        {
            XmlTextReader reader = null;

            if (test_debug)
                ConnectionTest += "\nReading connection xml file...";

            // Load the file with an XmlTextReader
            reader = new XmlTextReader(xmlSettingsFilePath);
            // Read the File
            while (reader.Read())
            {
                //checking where read text is element and and name is “DataSource”
                if (reader.NodeType == XmlNodeType.Element && reader.Name == "DataSource")
                {
                    if (test_debug)
                        ConnectionTest += "\nReading data source...";

                    //assigning ReadElementstring to strCmb1.
                    string datasource = reader.ReadElementString();

                    if (test_debug)
                        ConnectionTest += "\nData source = " + db_datasource;
                }
                if (reader.NodeType == XmlNodeType.Element && reader.Name == "Security")
                {
                    if (test_debug)
                        ConnectionTest += "\nReading security...";

                    string security = reader.ReadElementString();

                    if (test_debug)
                        ConnectionTest += "\nSecurity = " + db_security;
                }
            }
            if (test_debug)
                ConnectionTest += "\nClosing connection xml file...";

            reader.Close();
            reader = null;

            if (test_debug)
                ConnectionTest += "\nSuccess retrieving encrypted connection...";

            result = true;
        }
        else
        {
            if (test_debug)
                ConnectionTest += "\nLost connection xml file, could not be found at: " + xmlSettingsFilePath;
            throw new Exception("The configuration file, setup for database connectivity could not be found.");
        }
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nError occured while setting data source and security:\n\t - " + ex.Message;
        throw ex;
    }
    return result;
}

public void SQLDBAccessTest（字符串db）
{
如果（测试调试）
ConnectionTest=“测试已开始。”+DateTime.Now；
字符串conn_string=“”；
尝试
{
conn_字符串=createConnectionString（db）；
如果（测试调试）
ConnectionTest+=“\n连接字符串=”+“连接字符串+”；
}
捕获（例外情况除外）
{
掷骰子；
}
尝试
{
如果（测试调试）
ConnectionTest+=“\n正在创建到数据库的连接…”；
cnn=新的SqlConnection（连接字符串）；
如果（测试调试）
ConnectionTest+=“\n已创建连接。”；
如果（测试调试）
ConnectionTest+=“\n正在建立与数据库的开放连接…”；
cnn.Open（）；
如果（测试调试）
ConnectionTest+=“\n已建立到数据库的连接。”；
如果（测试调试）
ConnectionTest+=“\n关闭与数据库的连接…”；
cnn.Close（）；
如果（测试调试）
ConnectionTest+=“\n连接已关闭。”；
}
捕获（例外情况除外）
{
如果（测试调试）
ConnectionTest+=“\n连接到数据库时发生错误。\n\t-”+例如消息；
掷骰子；
}
如果（测试调试）
ConnectionTest+=“\n测试完成。”+DateTime.Now；
}
私有字符串createConnectionString（字符串数据库）
{
字符串tempConString=ConStr；
尝试
{
TestConnSettingsFile（）；
setDBDataSourceAndSecurity（）；
如果（测试调试）
ConnectionTest+=“\n正在创建连接字符串…”；
tempConString=tempConString.Replace（“，db_数据源）；
tempcontring=tempcontring.Replace（“，db）；
tempcontring=tempcontring.Replace（“，db_security”）；
如果（测试调试）
ConnectionTest+=“\n创建的连接字符串。”；
}
捕获（例外情况除外）
{
掷骰子；
}
返温；
}
私有布尔测试连接设置文件（）
{
bool设置fileexist=false；
字符串filePath=“”；
如果（测试调试）
ConnectionTest+=“\n测试加密的连接文件…”；
尝试
{
string directory=System.IO.Path.GetDirectoryName（System.Reflection.Assembly.GetEntryAssembly（）.Location）；
filePath=System.IO.Path.Combine（目录“afx.settings”）；
if（System.IO.File.Exists（filePath））
{
settingsFileExist=true；
xmlSettingsFilePath=filePath；
如果（测试调试）
ConnectionTest+=“\n已在以下位置找到加密的连接文件：”+文件路径；
}
其他的
{
如果（测试调试）
ConnectionTest+=“\n在以下位置找不到加密的连接文件：”+文件路径；
抛出新异常（“在“+filePath”处找不到加密的连接文件）；
}
}
捕获（例外情况除外）
{
如果（测试调试）
ConnectionTest+=“\n测试加密文件是否存在时出错：\n\t-“+ex.Message；
掷骰子；
}
返回设置文件存在；
}
私有bool setDBDataSourceAndSecurity（）
{
布尔结果=假；
如果（测试调试）
ConnectionTest+=“\n正在检索加密连接…”；
尝试
{
if（System.IO.File.Exists（xmlSettingsFilePath））
{
XmlTextReader=null；
如果（测试调试）
ConnectionTest+=“\n正在读取连接xml文件…”；
//使用XmlTextReader加载文件
reader=新的XmlTextReader（xmlSettingsFilePath）；
//读文件
while（reader.Read（））
{
//检查读取文本为元素且名称为“数据源”的位置
if（reader.NodeType==XmlNodeType.Element&&reader.Name==DataSource）
{
如果（测试调试）
ConnectionTest+=“\n正在读取数据源…”；
//将ReadElementstring分配给strCmb1。
string datasource=reader.ReadElementString（）；
如果（测试调试）
ConnectionTest+=“\n数据源=“+db\u数据源；
}
if（reader.NodeType==XmlNodeType.Element&&reader.Name==“安全性”）
{
如果（测试调试）
ConnectionTest+=“\n读取安全…”；
字符串安全性=reader.ReadElementString（）；
如果（测试调试）
ConnectionTest+=“\n安全性=“+db\U安全性；
}
}
如果（测试调试）
ConnectionTest+=“\n关闭连接xml文件…”；
reader.Close（）；
reader=null；
如果（测试调试）
ConnectionTest+=“\n成功检索加密连接…”；
结果=真；
}
其他的
{
如果（测试调试）
ConnectionTest+=“\n在以下位置找不到缺少连接的xml文件：”+xmlSettingsFilePath；
抛出新异常（“找不到配置文件，数据库连接设置”）；
}
}
捕获（例外情况除外）
{
如果（测试调试）
连接测试+=”
public void SQLDBAccessTest(string db)
{
    if (test_debug)
        ConnectionTest = "Test started. " + DateTime.Now;

    string conn_string = "";

    try
    {
        conn_string = createConnectionString(db);
        if (test_debug)
            ConnectionTest += "\nConnection string = '" + conn_string + "'";
    }
    catch (Exception ex)
    {
        throw ex;
    }

    try
    {
        if (test_debug)
            ConnectionTest += "\nCreating connection to database...";

        cnn = new SqlConnection(conn_string);

        if (test_debug)
            ConnectionTest += "\nConnection created.";

        if (test_debug)
            ConnectionTest += "\nEstablishing open connection to database...";

        cnn.Open();

        if (test_debug)
            ConnectionTest += "\nEstablished connection to database.";
        if (test_debug)
            ConnectionTest += "\nClosing connection to database...";

        cnn.Close();

        if (test_debug)
            ConnectionTest += "\nConnection closed.";
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nAn error has occured whilst connecting to the database.\n\t - " + ex.Message;

        throw ex;
    }

    if (test_debug)
        ConnectionTest += "\nTest complete. " + DateTime.Now;
}

private string createConnectionString(string db)
{
    string tempConString = ConStr;

    try
    {
        TestConnSettingsFile();
        setDBDataSourceAndSecurity();

        if (test_debug)
            ConnectionTest += "\nCreating connection string...";

        tempConString = tempConString.Replace("<SERVER>", db_datasource);
        tempConString = tempConString.Replace("<DB>", db);
        tempConString = tempConString.Replace("<SECURITY>", db_security);

        if (test_debug)
            ConnectionTest += "\nCreated connection string.";
    }
    catch (Exception ex)
    {
        throw ex;
    }
    return tempConString;
}

private bool TestConnSettingsFile()
{
    bool settingsFileExist = false;
    string filePath = "";

    if (test_debug)
        ConnectionTest += "\nTesting for encrypted connection file...";

    try
    {
        string directory = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetEntryAssembly().Location);
        filePath = System.IO.Path.Combine(directory, "afx.settings");

        if (System.IO.File.Exists(filePath))
        {
            settingsFileExist = true;
            xmlSettingsFilePath = filePath;

            if (test_debug)
                ConnectionTest += "\nThe encrypted connection file has been found at: " + filePath;
        }
        else
        {
            if (test_debug)
                ConnectionTest += "\nThe encrypted connection file could not be found at: " + filePath;
            throw new Exception("The encrypted connection file could not be found at: " + filePath);
        }
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nError occured while testing if encrypted file exists:\n\t - " + ex.Message;
        throw ex;
    }

    return settingsFileExist;
}

private bool setDBDataSourceAndSecurity()
{
    bool result = false;

    if (test_debug)
        ConnectionTest += "\nRetrieving encrypted connection...";

    try
    {
        if (System.IO.File.Exists(xmlSettingsFilePath))
        {
            XmlTextReader reader = null;

            if (test_debug)
                ConnectionTest += "\nReading connection xml file...";

            // Load the file with an XmlTextReader
            reader = new XmlTextReader(xmlSettingsFilePath);
            // Read the File
            while (reader.Read())
            {
                //checking where read text is element and and name is “DataSource”
                if (reader.NodeType == XmlNodeType.Element && reader.Name == "DataSource")
                {
                    if (test_debug)
                        ConnectionTest += "\nReading data source...";

                    //assigning ReadElementstring to strCmb1.
                    string datasource = reader.ReadElementString();

                    if (test_debug)
                        ConnectionTest += "\nData source = " + db_datasource;
                }
                if (reader.NodeType == XmlNodeType.Element && reader.Name == "Security")
                {
                    if (test_debug)
                        ConnectionTest += "\nReading security...";

                    string security = reader.ReadElementString();

                    if (test_debug)
                        ConnectionTest += "\nSecurity = " + db_security;
                }
            }
            if (test_debug)
                ConnectionTest += "\nClosing connection xml file...";

            reader.Close();
            reader = null;

            if (test_debug)
                ConnectionTest += "\nSuccess retrieving encrypted connection...";

            result = true;
        }
        else
        {
            if (test_debug)
                ConnectionTest += "\nLost connection xml file, could not be found at: " + xmlSettingsFilePath;
            throw new Exception("The configuration file, setup for database connectivity could not be found.");
        }
    }
    catch (Exception ex)
    {
        if (test_debug)
            ConnectionTest += "\nError occured while setting data source and security:\n\t - " + ex.Message;
        throw ex;
    }
    return result;
}

public string Tester
{
    get { return tester; }
}

<TextBox Name="txtTestMessage" Text="{Binding Tester.Test}" />

public void dotest(){
    var dummyAction = new Action( () => Thread.Sleep(1000) );
    var first = new Task(dummyAction);
    var second = new Task(dummyAction);
    var third = new Task(dummyAction);

    first.ContinueWith(task =>
    {
        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
        {
            Test = Environment.NewLine + "past point one";
        }));
        second.Start();
    });
    second.ContinueWith(task =>
    {
        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
        {
            Test += Environment.NewLine + "past point two";
        }));
        third.Start();
    });
    third.ContinueWith(task => {
        Application.Current.Dispatcher.BeginInvoke(new Action(() =>
        {
            Test += Environment.NewLine + "Finished testing";
        }));
    });
    first.Start();
}

Tester tester = new Tester();

//Add property to return your Tester instance.
public Tester TestLink
{
    get { return tester; }
}

//In your XAML bind Test property.
<TextBox Name="txtTestMessage" Text="{Binding TestLink.Test}" />