delphi10.3下学习ClientDataSet1全攻略

0]ClientDataSet1.Active 设为true弹出AVdsnap260.bpl错误的解决办法

Access violation at address 5134E27F in module 'dsnap260.bpl'. Read of address 00000000.

:因为与Delphi7冲突，这是先装delphi10.3,再装Delphi7造成的。解决办法，

将Midas.dll从C:\Program Files (x86)\Embarcadero\Studio\20.0\bin\midas.dll

覆盖   掉C:\Windows\SysWOW64\midas.dll

 02]最简单代码

{本来可以不写代码, 设置四个属性即可}
procedure TForm1.FormCreate(Sender: TObject);
begin
  DBGrid1.DataSource := DataSource1;     {DBGrid1 需要连接数据源}
  DataSource1.DataSet := ClientDataSet1; {数据源 DataSource 需要连接数据集}
  ClientDataSet1.FileName := 'country.cds';
  ClientDataSet1.Active := True; //或 ClientDataSet1.Open;
end;

 

链接：https://pan.baidu.com/s/1Ovp_U0qn_Gr-zrqN0x-Xng
提取码：sais

更多CDS文件下载：D:\Ext.Samples\Samples\Data

  //过滤数据
  ClientDataSet1.Filter :=  'Name like ''%r%''';//Name字段包含  r
  ClientDataSet1.Filtered := True;