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情绝��D��(fresmaster) — Sun, 10 Jul 2016 12:38:00 GMT

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情绝��D��(fresmaster) 2016-07-10 20:38 发表评论

DateTime常用�Ҏ��

情绝��D��(fresmaster) — Sun, 10 Jul 2016 12:34:00 GMT

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情绝��D��(fresmaster) 2016-07-10 20:34 发表评论

情绝��D��(fresmaster) — Sat, 12 Dec 2015 07:18:00 GMT

一�Q�通过System.Data.OracleClient(需要安装Oracle客户端�ƈ配置tnsnames.ora)
1. ��d��命名�I�间System.Data.OracleClient引用
2. using System.Data.OracleClient;
3. 
string connString = "User ID=IFSAPP;Password=IFSAPP;Data Source=RACE;";
OracleConnection conn = new OracleConnection(connString);
try
{
    conn.Open();
    MessageBox.Show(conn.State.ToString());
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

二：通过System.Data.OracleClient(需要安装Oracle客户端不需配置tnsnames.ora)
1. ��d��命名�I�间System.Data.OracleClient引用
2. using System.Data.OracleClient;
3.
string connString = "User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";
OracleConnection conn = new OracleConnection(connString);
try
{
    conn.Open();
    MessageBox.Show(conn.State.ToString());
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

三：通过System.Data.OleDb和Oracle公司的驱�?
1. ��d��命名�I�间System.Data.OracleClient引用
2. using System.Data.OleDb;
3.
string connString = "Provider=OraOLEDB.Oracle.1;User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";
OleDbConnection conn = new OleDbConnection(connString);
try
{
    conn.Open();
    MessageBox.Show(conn.State.ToString());
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

四：通过System.Data.OleDb和微软公司的Oracle驱动
1. ��d��命名�I�间System.Data.OracleClient引用
2. using System.Data.OleDb;
3.
string connString = "Provider=MSDAORA.1;User ID=IFSAPP;Password=IFSAPP;Data Source=(DESCRIPTION = (ADDRESS_LIST= (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))) (CONNECT_DATA = (SERVICE_NAME = RACE)))";
OleDbConnection cnn = new OleDbConnection(connString);
try
{
    conn.Open();
    MessageBox.Show(conn.State.ToString());
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

备注�Q?
a.XP操作�pȝ��已经安装了微软公司的Oracle驱动C:\Program Files\Common Files\System\Ole DB\msdaora.dll
b.该驱动需要Oracle客户端的三个文�g(oraocixe10.dll、oci.dll、ociw32.dll)攑֜�System32下即�?

五：使用ODP�q�接
1. 下蝲安装ODP.NET(http://www.oracle.com/technetwork/developer-tools/visual-studio/downloads/index.html)
2. 安装完全成后会��生一序列文�g�?
3. 扑ֈ��q�个安装目录�Q�打开文�g�?ORACLE_HOME%\Network\Admin在这个下面徏立一个tnsnames.ora的文�Ӟ��其内容可以参考其下的Sample目录下面的配�|?
Oracle.RACE =
(DESCRIPTION=
   (ADDRESS_LIST=
     (ADDRESS=
       (PROTOCOL=TCP)
       (HOST=127.0.0.1)
       (PORT=1521)
     )
   )
   (CONNECT_DATA=
     (SID=RACE)
     (SERVER=DEDICATED)
   )
)
Oracle.RACE�����接字�W�串名称�Q�可以随便取。等号后面的字符串可以在Enterprise Manager Console工具中连接数据库后的TNS描述�W�中拯����?
4. 引用Oracle.DataAccess命名�I�间
5. using Oracle.DataAccess.Client;
6. �C�Z��代码�Q?
string connString = "DATA SOURCE=Oracle.RACE;PERSIST SECURITY INFO=True;USER ID=IFSAPP;password=IFSAPP";
OracleConnection conn = new OracleConnection(connString);
try
{
    conn.Open();
    OracleCommand cmd = new OracleCommand(cmdText,conn);
    OracleDataReader reader = cmd.ExecuteReader();
    this.DataGridView1.DataSource = reader;
    this.DataGridView1.DataBind();
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

六：使用�W�三斚w���?
�W�三斚w��动有 Devart�Q�下载驱�?http://www.devart.com/dotconnect/oracle/�Q�但是是商业版，需要购买许可或破解
�q�接格式 User ID=myUsername;Password=myPassword;Host=ora;Pooling=true;Min Pool Size=0;Max Pool Size=100;Connection Lifetime=0;
1. 引用Devart.Data.Oracle命名�I�间
2. using Devart.Data.Oracle;
3.
OracleConnection conn = new OracleConnection();
conn.ConnectionString = "";
conn.Unicode = true;
conn.UserId = "IFSAPP";
conn.Password = "IFSAPP";
conn.Port = 1521;
conn.Server = "127.0.0.1";
conn.Sid = "RACE";
try
{
    conn.Open();
    //execute queries, etc
}
catch (Exception ex)
{
    ShowErrorMessage(ex.Message.ToString());
}
finally
{
    conn.Close();
}

情绝��D��(fresmaster) 2015-12-12 15:18 发表评论

情绝��D��(fresmaster) — Thu, 22 Oct 2015 16:27:00 GMT

摘要: 阅读全文

情绝��D��(fresmaster) 2015-10-23 00:27 发表评论

glAlphaFunc in OpenGL ES2.0

情绝��D��(fresmaster) — Mon, 19 Nov 2012 14:28:00 GMT

In OpenGL ES 2.0 glAlphaFunc isn't available, you have to implement it in a fragment shader. There isn't a lot of reference out there for this (not that I could find anyway) so I thought I'd write this up.

It's actually quite simple to implement a quick alpha test. I needed to be able to cookie cut out sprites and fonts so I simply needed to reject fragments where the alpha value was zero. Here are the guts of a shader to do this:

#ifdef GL_ES 
precision highp float;
#endif 
uniform sampler2D u_tex0; 
uniform bool u_alphatestenable; 
varying vec2 v_texCoord;
varying vec4 v_color;
void main(){ 
    //calculate the fragment color based on the texture and the vertex colour
    vec4 basecolor = texture2D( u_tex0, v_texCoord ) * v_color;

    //if testing is enabled, check the alpha component and discard if zero      
    if(u_alphatestenable){ 
        if(basecolor.a == 0.0){ 
            //throw this fragment away
            discard;
        }
    }
    gl_FragColor = basecolor;
}

You need to set up a uniform variable u_alphatestenable which enables the alpha test. If you want to support different test types ( less than, greater than etc) then you will need two more uniform variables: one for the test type and one for the value to test against.

int uni_alphatest_enable = glGetUniformLocation(mProgram, "u_alphatestenable"); 
bool alphateston = true; 
glUniform1i(uni_alphatest_enabl

note that you shouldn't call glGetUniformLocation every frame, it should be cached somewhere.
It's quite simple and while you may be thinking oh that is so slow it not that bad. It's faster then the fixed function pipeline which is doing tests for alpha, lights, blend modes etc. If you get paranoid then you can create multiple shaders that support different subsets of features. All you need to be careful of is the cost of calling glSetProgram (to switch shaders) which can be expensive and cause bubbles in the vertex pipeline in the hardware.

情绝��D��(fresmaster) 2012-11-19 22:28 发表评论