Delphi 调整列宽DBGrid
我有一个TDBGrid。它可以工作,但显示的列非常大Delphi 调整列宽DBGrid,delphi,dbgrid,Delphi,Dbgrid,我有一个TDBGrid。它可以工作,但显示的列非常大 如何设置“自动固定列宽”所需的列宽取决于网格画布的设置和每个字段显示文本的最大长度 procedure FitGrid(Grid: TDBGrid); const C_Add=3; var ds: TDataSet; bm: TBookmark; i: Integer; w: Integer; a: Array of Integer; begin ds := Grid.DataSource.DataSet; i
如何设置“自动固定列宽”所需的列宽取决于网格画布的设置和每个字段显示文本的最大长度
procedure FitGrid(Grid: TDBGrid);
const
C_Add=3;
var
ds: TDataSet;
bm: TBookmark;
i: Integer;
w: Integer;
a: Array of Integer;
begin
ds := Grid.DataSource.DataSet;
if Assigned(ds) then
begin
ds.DisableControls;
bm := ds.GetBookmark;
try
ds.First;
SetLength(a, Grid.Columns.Count);
while not ds.Eof do
begin
for I := 0 to Grid.Columns.Count - 1 do
begin
if Assigned(Grid.Columns[i].Field) then
begin
w := Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName).DisplayText);
if a[i] < w then
a[i] := w ;
end;
end;
ds.Next;
end;
for I := 0 to Grid.Columns.Count - 1 do
Grid.Columns[i].Width := a[i] + C_Add;
ds.GotoBookmark(bm);
finally
ds.FreeBookmark(bm);
ds.EnableControls;
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
FitGrid(DBgrid1)
end;
程序FitGrid(网格:TDBGrid);
常数
C_Add=3;
变量
ds:TDataSet;
bm:TBookmark;
i:整数;
w:整数;
a:整数数组;
开始
ds:=Grid.DataSource.DataSet;
如果分配(ds),则
开始
禁用控制;
bm:=ds.GetBookmark;
尝试
第一,;
SetLength(a,Grid.Columns.Count);
而不是ds.Eof
开始
对于I:=0到Grid.Columns.Count-1 do
开始
如果指定了(Grid.Columns[i].Field),则
开始
w:=Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName).DisplayText);
如果a[i]
对bummi的答案进行微小修改,以确保标题行(第0行)不会被截断
procedure FitGrid(Grid: TDBGrid);
const
C_Add=3;
var
ds: TDataSet;
bm: TBookmark;
i: Integer;
w: Integer;
a: Array of Integer;
begin
ds := Grid.DataSource.DataSet;
if Assigned(ds) then
begin
ds.DisableControls;
bm := ds.GetBookmark;
try
ds.First;
SetLength(a, Grid.Columns.Count);
while not ds.Eof do
begin
for I := 0 to Grid.Columns.Count - 1 do
begin
if Assigned(Grid.Columns[i].Field) then
begin
w := Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName.).DisplayText);
if a[i] < w then
a[i] := w ;
end;
end;
ds.Next;
end;
//if fieldwidth is smaller than Row 0 (field names) fix
for I := 0 to Grid.Columns.Count - 1 do
begin
w := Grid.Canvas.TextWidth(Grid.Columns[i].Field.FieldName);
if a[i] < w then
a[i] := w ;
end;
for I := 0 to Grid.Columns.Count - 1 do
Grid.Columns[i].Width := a[i] + C_Add;
ds.GotoBookmark(bm);
finally
ds.FreeBookmark(bm);
ds.EnableControls;
end;
end;
end;
程序FitGrid(网格:TDBGrid);
常数
C_Add=3;
变量
ds:TDataSet;
bm:TBookmark;
i:整数;
w:整数;
a:整数数组;
开始
ds:=Grid.DataSource.DataSet;
如果分配(ds),则
开始
禁用控制;
bm:=ds.GetBookmark;
尝试
第一,;
SetLength(a,Grid.Columns.Count);
而不是ds.Eof
开始
对于I:=0到Grid.Columns.Count-1 do
开始
如果指定了(Grid.Columns[i].Field),则
开始
w:=Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName.).DisplayText);
如果a[i]
对bummi的答案进行微小修改,以确保标题行(第0行)不会被截断,并在每列上分配多余的空间
procedure FitGrid(Grid: TDBGrid);
const
C_Add = 3;
var
ds: TDataSet;
bm: TBookmark;
i: Integer;
w: Integer;
a: array of Integer;
begin
ds := Grid.DataSource.DataSet;
if not Assigned(ds) then
exit;
if Grid.Columns.Count = 0 then
exit;
ds.DisableControls;
bm := ds.GetBookmark;
try
ds.First;
SetLength(a, Grid.Columns.Count);
for i := 0 to Grid.Columns.Count - 1 do
if Assigned(Grid.Columns[i].Field) then
a[i] := Grid.Canvas.TextWidth(Grid.Columns[i].FieldName);
while not ds.Eof do
begin
for i := 0 to Grid.Columns.Count - 1 do
begin
if not Assigned(Grid.Columns[i].Field) then
continue;
w := Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName).DisplayText);
if a[i] < w then
a[i] := w;
end;
ds.Next;
end;
w := 0;
for i := 0 to Grid.Columns.Count - 1 do
begin
Grid.Columns[i].Width := a[i] + C_Add;
inc(w, a[i] + C_Add);
end;
w := (Grid.ClientWidth - w - 20) div (Grid.Columns.Count);
if w > 0 then
for i := 0 to Grid.Columns.Count - 1 do
Grid.Columns[i].Width := Grid.Columns[i].Width + w;
ds.GotoBookmark(bm);
finally
ds.FreeBookmark(bm);
ds.EnableControls;
end;
end;
程序FitGrid(网格:TDBGrid);
常数
C_Add=3;
变量
ds:TDataSet;
bm:TBookmark;
i:整数;
w:整数;
a:整数数组;
开始
ds:=Grid.DataSource.DataSet;
如果未分配(ds),则
出口
如果Grid.Columns.Count=0,则
出口
禁用控制;
bm:=ds.GetBookmark;
尝试
第一,;
SetLength(a,Grid.Columns.Count);
对于i:=0到Grid.Columns.Count-1 do
如果指定了(Grid.Columns[i].Field),则
a[i]:=Grid.Canvas.TextWidth(Grid.Columns[i].FieldName);
而不是ds.Eof
开始
对于i:=0到Grid.Columns.Count-1 do
开始
如果未指定(Grid.Columns[i].Field),则
继续;
w:=Grid.Canvas.TextWidth(ds.FieldByName(Grid.Columns[i].Field.FieldName).DisplayText);
如果a[i]0,则
对于i:=0到Grid.Columns.Count-1 do
Grid.Columns[i]。宽度:=Grid.Columns[i]。宽度+w;
哥托博马克博士(bm);
最后
免费书签(bm);
ds.EnableControl;
结束;
结束;
对bummi、TheSteven和Jens的答案进行了细微修改,以确保标题行(第0行)不会被截断,并且会在每列上分配多余的空间,并考虑列的可见性
procedure-FitGrid(const-Grid:TDBGrid;const-CoverWhiteSpace:Boolean=True);
常数
C_Add=3;
变量
DS:TDataSet;
BM:TBookmark;
一、 W,VisibleColumnsCount:整数;
A:整数数组;
VisibleColumns:TColumn的数组;
开始
DS:=Grid.DataSource.DataSet;
如果分配(DS),则
开始
VisibleColumnsCount:=0;
SetLength(VisibleColumns、Grid.Columns.Count);
对于I:=0到Grid.Columns.Count-1 do
如果指定了(Grid.Columns[I].Field)和(Grid.Columns[I].Visible),则
开始
VisibleColumns[VisibleColumnsCount]:=Grid.Columns[I];
公司(VisibleColumnsunt);
结束;
设置长度(VisibleColumns,VisibleColumnsCount);
禁用控制;
BM:=DS.GetBookmark;
尝试
第一,;
设置长度(A,可见列);
而不是DS.Eof
开始
对于I:=0的VisibleColumnsCount-1 do
开始
W:=Grid.Canvas.TextWidth(DS.FieldByName(VisibleColumns[I].Field.FieldName).DisplayText);
如果A[I]procedure FitGrid(const Grid: TDBGrid; const CoverWhiteSpace: Boolean = True);
const
C_Add=3;
var
DS: TDataSet;
BM: TBookmark;
I, W, VisibleColumnsCount: Integer;
A: array of Integer;
VisibleColumns: array of TColumn;
begin
DS := Grid.DataSource.DataSet;
if Assigned(DS) then
begin
VisibleColumnsCount := 0;
SetLength(VisibleColumns, Grid.Columns.Count);
for I := 0 to Grid.Columns.Count - 1 do
if Assigned(Grid.Columns[I].Field) and (Grid.Columns[I].Visible) then
begin
VisibleColumns[VisibleColumnsCount] := Grid.Columns[I];
Inc(VisibleColumnsCount);
end;
SetLength(VisibleColumns, VisibleColumnsCount);
DS.DisableControls;
BM := DS.GetBookmark;
try
DS.First;
SetLength(A, VisibleColumnsCount);
while not DS.Eof do
begin
for I := 0 to VisibleColumnsCount - 1 do
begin
W := Grid.Canvas.TextWidth(DS.FieldByName(VisibleColumns[I].Field.FieldName).DisplayText);
if A[I] < W then
A[I] := W;
end;
DS.Next;
end;
//if fieldwidth is smaller than Row 0 (field names) fix
for I := 0 to VisibleColumnsCount - 1 do
begin
W := Grid.Canvas.TextWidth(VisibleColumns[I].Field.FieldName);
if A[I] < W then
A[I] := W;
end;
W := 0;
if CoverWhiteSpace then
begin
for I := 0 to VisibleColumnsCount - 1 do
Inc(W, A[I] + C_Add);
W := (Grid.ClientWidth - W - 20) div VisibleColumnsCount;
if W < 0 then
W := 0;
end;
for I := 0 to VisibleColumnsCount - 1 do
VisibleColumns[I].Width := A[I] + C_Add + W;
DS.GotoBookmark(BM);
finally
DS.FreeBookmark(BM);
DS.EnableControls;
end;
end;
end;
const
C_Add=20;
Sup := 0;
if CoverWhiteSpace then
sup :=C_Add;
for I := 0 to VisibleColumnsCount - 1 do
VisibleColumns[I].Width := A[I] + sup;
DS.GotoBookmark(BM);