dataGridView not updating c#? -

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i have filled datagridview using code below

    this.empinfotableadapter1.fill(this.empdata.empinfo);

but when updating table gridview updating orginal database. not showing update in form.

i have searched google , found similar question. of them custom data binding. not using 

  this.empinfotableadapter1.fill(this.empdata.empinfo);

so, posted question.

if asp.net application need call databind() like:

gridview1.databind();

if winform application need assign datasoure again like:

gridview1.datasource = this.empdata.empinfo;

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