private void btnAddFont_Click(object sender, EventArgs e) { float fSize = this.txtResult.Font.Size; if (fSize > 22.0) { return; } fSize = fSize + 1; txtResult.Font = new Font(txtResult.Font.FontFamily, fSize, txtResult.Font.Style); } private void btnSubtractFont_Click(object sender, EventArgs e) { float fSize = this.txtResult.Font.Size; if (fSize <6.0) { return; } fSize = fSize - 1; txtResult.Font = new Font(txtResult.Font.FontFamily, fSize, txtResult.Font.Style); }
winform 给textbox 增加 或 减小字体大小 z
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