As shown in figure, it is a form of WPF, the middle piece is the DataGrid,

The form consists of 3 large
The top is a GRID, there is some of the above control;
In the middle is a GRID there is a DataGrid above;
After the bottom is also a grid to put photos,,

Could you tell me if want to set the placed on the GRID in the middle of the DataGrid control line 5 font size must be 21, how should do?

In addition to set up the datagrid row 2 column 1 cell type must be 23, how should do??




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